Google-Provided Templates | Cloud Dataflow

Google provides a set of open-source Cloud Dataflow templates. The following templates are available:

WordCount
Cloud Bigtable to Cloud Storage AvroFile
Cloud Bigtable to Cloud Storage SequenceFile
Cloud Pub/Sub to BigQuery
Cloud Storage Text to Cloud Pub/Sub (Batch)
Cloud Storage Text to Cloud Pub/Sub (Stream)
Cloud Pub/Sub to Cloud Storage Text
Cloud Pub/Sub to Cloud Pub/Sub
Cloud Datastore to Cloud Storage Text
Cloud Storage Text to BigQuery
Cloud Storage Text to Cloud Datastore
Cloud Storage AvroFile to Cloud Bigtable
Cloud Storage SequenceFile to Cloud Bigtable
Bulk Compress Cloud Storage Files
Bulk Decompress Cloud Storage Files
Cloud Datastore Bulk Delete
Cloud Spanner to Cloud Storage Avro
Cloud Spanner to Cloud Storage Text
Cloud Storage Avro to Cloud Spanner
Java Database Connectivity (JDBC) to BigQuery
Cloud Pub/Sub to Cloud Storage Avro

WordCount

The WordCount template is a batch pipeline that reads text from Cloud Storage, tokenizes the text lines into individual words, and performs a frequency count on each of the words. For more information about WordCount, see WordCount Example Pipeline.

Template parameters

Parameter	Description
`inputFile`	The Cloud Storage input file path.
`output`	The Cloud Storage output file path and prefix.

Executing the WordCount template

Console

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the WordCount template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/latest/Word_Count

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/Word_Count \
    --parameters \
inputFile=gs://dataflow-samples/shakespeare/kinglear.txt,\
outputFile=gs://YOUR_BUCKET_NAME/output/my_output

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/latest/Word_Count

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/Word_Count
{
    "jobName": "JOB_NAME",
    "parameters": {
       "inputFile" : "gs://dataflow-samples/shakespeare/kinglear.txt",
       "output": "gs://YOUR_BUCKET_NAME/output/my_output"
    },
    "environment": { "zone": "us-central1-f" }
}

Cloud Bigtable to Cloud Storage AvroFile

The Cloud Bigtable to Cloud Storage AvroFile template is a pipeline that reads data from a Cloud Bigtable table and writes them to a Cloud Storage bucket in AvroFile format. You can use the template as a quick solution to move data from Cloud Bigtable to Cloud Storage.

Requirements for this pipeline:

The Cloud Bigtable table must exist.
The output Cloud Storage bucket must exist prior to pipeline execution.

Template parameters

Parameter	Description
`bigtableProjectId`	The ID of the GCP project of the Cloud Bigtable instance that you want to read data from.
`bigtableInstanceId`	The ID of the Cloud Bigtable instance that contains the table.
`bigtableTableId`	The ID of the Cloud Bigtable table to export.
`outputDirectory`	Cloud Storage path where data should be written. For example, `gs://mybucket/somefolder`.
`filenamePrefix`	The prefix of the AvroFile file name. For example, `output-`.

Executing the Cloud Bigtable to Cloud Storage AvroFile template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Bigtable to Cloud Storage AvroFile template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Cloud_Bigtable_to_GCS_AvroFile

Use this example request as documented in Using the REST API. This request requires authorization, and you must specify a tempLocation where you have write permissions. You must replace the following values in this example:

Replace [YOUR_PROJECT_ID] with your project ID.
Replace [JOB_NAME] with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace [PROJECT_ID] with the ID of the GCP project of the Cloud Bigtable instance that you want to read data from.
Replace [INSTANCE_ID] with the ID of the Cloud Bigtable instance that contains the table.
Replace [TABLE_ID] with the ID of the Cloud Bigtable table to export.
Replace [OUTPUT_DIRECTORY] with Cloud Storage path where data should be written. For example, gs://mybucket/somefolder.
Replace [FILENAME_PREFIX] with the prefix of the AvroFile file name. For example, output-.

gcloud dataflow jobs run [JOB_NAME] \
    --gcs-location gs://dataflow-templates/latest/Cloud_Bigtable_to_GCS_AvroFile \
    --parameters bigtableProjectId=[PROJECT_ID],bigtableInstanceId=[INSTANCE_ID],bigtableTableId=[TABLE_ID],outputDirectory=[OUTPUT_DIRECTORY],filenamePrefix=[FILENAME_PREFIX]

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Cloud_Bigtable_to_GCS_AvroFile

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

Replace [YOUR_PROJECT_ID] with your project ID.
Replace [JOB_NAME] with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace [PROJECT_ID] with the ID of the GCP project of the Cloud Bigtable instance that you want to read data from.
Replace [INSTANCE_ID] with the ID of the Cloud Bigtable instance that contains the table.
Replace [TABLE_ID] with the ID of the Cloud Bigtable table to export.
Replace [OUTPUT_DIRECTORY] with Cloud Storage path where data should be written. For example, gs://mybucket/somefolder.
Replace [FILENAME_PREFIX] with the prefix of the AvroFile file name. For example, output-.

POST https://dataflow.googleapis.com/v1b3/projects/[YOUR_PROJECT_ID]/templates:launch?gcsPath=gs://dataflow-templates/latest/Cloud_Bigtable_to_GCS_AvroFile
{
   "jobName": "[JOB_NAME]",
   "parameters": {
       "bigtableProjectId": "[PROJECT_ID]",
       "bigtableInstanceId": "[INSTANCE_ID]",
       "bigtableTableId": "[TABLE_ID]",
       "outputDirectory": "[OUTPUT_DIRECTORY]",
       "filenamePrefix": "[FILENAME_PREFIX]",
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java: SDK 2.x

This template's source code is in the GoogleCloudPlatform/DataflowTemplates repository on GitHub.

Python

Python source code is not available.

Cloud Bigtable to Cloud Storage SequenceFile

The Cloud Bigtable to Cloud Storage SequenceFile template is a pipeline that reads data from a Cloud Bigtable table and writes them to a Cloud Storage bucket in SequenceFile format. You can use the template as a quick solution to move data from Cloud Bigtable to Cloud Storage.

Requirements for this pipeline:

The Cloud Bigtable table must exist.
The output Cloud Storage bucket must exist prior to pipeline execution.

Template parameters

Parameter	Description
`bigtableProject`	The ID of the GCP project of the Cloud Bigtable instance that you want to read data from.
`bigtableInstanceId`	The ID of the Cloud Bigtable instance that contains the table.
`bigtableTableId`	The ID of the Cloud Bigtable table to export.
`bigtableAppProfileId`	The ID of the Cloud Bigtable application profile to be used for the export. If you do not specify an app profile, Cloud Bigtable uses the instance's default app profile.
`destinationPath`	Cloud Storage path where data should be written. For example, `gs://mybucket/somefolder`.
`filenamePrefix`	The prefix of the SequenceFile file name. For example, `output-`.

Executing the Cloud Bigtable to Cloud Storage SequenceFile template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Bigtable to Cloud Storage SequenceFile template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Cloud_Bigtable_to_GCS_SequenceFile

Replace [YOUR_PROJECT_ID] with your project ID.
Replace [JOB_NAME] with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace [PROJECT_ID] with the ID of the GCP project of the Cloud Bigtable instance that you want to read data from.
Replace [INSTANCE_ID] with the ID of the Cloud Bigtable instance that contains the table.
Replace [TABLE_ID] with the ID of the Cloud Bigtable table to export.
Replace [APPLICATION_PROFILE_ID] with the ID of the Cloud Bigtable application profile to be used for the export.
Replace [DESTINATION_PATH] with Cloud Storage path where data should be written. For example, gs://mybucket/somefolder.
Replace [FILENAME_PREFIX] with the prefix of the SequenceFile file name. For example, output-.

gcloud dataflow jobs run [JOB_NAME] \
    --gcs-location gs://dataflow-templates/latest/Cloud_Bigtable_to_GCS_SequenceFile \
    --parameters bigtableProject=[PROJECT_ID],bigtableInstanceId=[INSTANCE_ID],bigtableTableId=[TABLE_ID],bigtableAppProfileId=[APPLICATION_PROFILE_ID],destinationPath=[DESTINATION_PATH],filenamePrefix=[FILENAME_PREFIX]

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Cloud_Bigtable_to_GCS_SequenceFile

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

Replace [YOUR_PROJECT_ID] with your project ID.
Replace [JOB_NAME] with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace [PROJECT_ID] with the ID of the GCP project of the Cloud Bigtable instance that you want to read data from.
Replace [INSTANCE_ID] with the ID of the Cloud Bigtable instance that contains the table.
Replace [TABLE_ID] with the ID of the Cloud Bigtable table to export.
Replace [APPLICATION_PROFILE_ID] with the ID of the Cloud Bigtable application profile to be used for the export.
Replace [DESTINATION_PATH] with Cloud Storage path where data should be written. For example, gs://mybucket/somefolder.
Replace [FILENAME_PREFIX] with the prefix of the SequenceFile file name. For example, output-.

POST https://dataflow.googleapis.com/v1b3/projects/[YOUR_PROJECT_ID]/templates:launch?gcsPath=gs://dataflow-templates/latest/Cloud_Bigtable_to_GCS_SequenceFile
{
   "jobName": "[JOB_NAME]",
   "parameters": {
       "bigtableProject": "[PROJECT_ID]",
       "bigtableInstanceId": "[INSTANCE_ID]",
       "bigtableTableId": "[TABLE_ID]",
       "bigtableAppProfileId": "[APPLICATION_PROFILE_ID]",
       "destinationPath": "[DESTINATION_PATH]",
       "filenamePrefix": "[FILENAME_PREFIX]",
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java: SDK 2.x

This template's source code is in the GoogleCloudPlatform/cloud-bigtable-client repository on GitHub.

Python

Python source code is not available.

Cloud Pub/Sub to BigQuery

The Cloud Pub/Sub to BigQuery template is a streaming pipeline that reads JSON-formatted messages from a Cloud Pub/Sub topic and writes them to a BigQuery table. You can use the template as a quick solution to move Cloud Pub/Sub data to BigQuery. The template reads JSON-formatted messages from Cloud Pub/Sub and converts them to BigQuery elements.

Requirements for this pipeline:

The Cloud Pub/Sub messages must be in JSON format, described here. For example, messages formatted as {"k1":"v1", "k2":"v2"} may be inserted into a BigQuery table with two columns, named k1 and k2, with string data type.
The output directory must exist prior to pipeline execution.

Template parameters

Parameter	Description
`inputTopic`	The Cloud Pub/Sub input topic to read from, in the format of `projects/<project>/topics/<topic>`.
`outputTableSpec`	The BigQuery output table location, in the format of `<my-project>:<my-dataset>.<my-table>`

Executing the Cloud Pub/Sub to BigQuery template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Pub/Sub to BigQuery template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/PubSub_to_BigQuery

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_TOPIC_NAME with your Cloud Pub/Sub topic name.
Replace YOUR_DATASET with your BigQuery dataset, and replace YOUR_TABLE_NAME with your BigQuery table name.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/PubSub_to_BigQuery \
    --parameters \
inputTopic=projects/YOUR_PROJECT_ID/topics/YOUR_TOPIC_NAME,\
outputTableSpec=YOUR_PROJECT_ID:YOUR_DATASET.YOUR_TABLE_NAME

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/PubSub_to_BigQuery

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_TOPIC_NAME with your Cloud Pub/Sub topic name.
Replace YOUR_DATASET with your BigQuery dataset, and replace YOUR_TABLE_NAME with your BigQuery table name.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/PubSub_to_BigQuery
{
   "jobName": "JOB_NAME",
   "parameters": {
       "inputTopic": "projects/YOUR_PROJECT_ID/topics/YOUR_TOPIC_NAME",
       "outputTableSpec": "YOUR_PROJECT_ID:YOUR_DATASET.YOUR_TABLE_NAME"
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.cloud.teleport.templates;

import com.google.api.services.bigquery.model.TableRow;
import com.google.cloud.teleport.coders.FailsafeElementCoder;
import com.google.cloud.teleport.templates.common.BigQueryConverters.FailsafeJsonToTableRow;
import com.google.cloud.teleport.templates.common.ErrorConverters.WritePubsubMessageErrors;
import com.google.cloud.teleport.templates.common.JavascriptTextTransformer.FailsafeJavascriptUdf;
import com.google.cloud.teleport.templates.common.JavascriptTextTransformer.JavascriptTextTransformerOptions;
import com.google.cloud.teleport.util.DualInputNestedValueProvider;
import com.google.cloud.teleport.util.DualInputNestedValueProvider.TranslatorInput;
import com.google.cloud.teleport.util.ResourceUtils;
import com.google.cloud.teleport.util.ValueProviderUtils;
import com.google.cloud.teleport.values.FailsafeElement;
import java.nio.charset.StandardCharsets;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.PipelineResult;
import org.apache.beam.sdk.coders.CoderRegistry;
import org.apache.beam.sdk.coders.StringUtf8Coder;
import org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO;
import org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO.Write.CreateDisposition;
import org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO.Write.WriteDisposition;
import org.apache.beam.sdk.io.gcp.pubsub.PubsubIO;
import org.apache.beam.sdk.io.gcp.pubsub.PubsubMessage;
import org.apache.beam.sdk.io.gcp.pubsub.PubsubMessageWithAttributesCoder;
import org.apache.beam.sdk.options.Description;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.options.ValueProvider;
import org.apache.beam.sdk.transforms.DoFn;
import org.apache.beam.sdk.transforms.Flatten;
import org.apache.beam.sdk.transforms.PTransform;
import org.apache.beam.sdk.transforms.ParDo;
import org.apache.beam.sdk.transforms.SerializableFunction;
import org.apache.beam.sdk.values.PCollection;
import org.apache.beam.sdk.values.PCollectionList;
import org.apache.beam.sdk.values.PCollectionTuple;
import org.apache.beam.sdk.values.TupleTag;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * The {@link PubSubToBigQuery} pipeline is a streaming pipeline which ingests data in JSON format
 * from Cloud Pub/Sub, executes a UDF, and outputs the resulting records to BigQuery. Any errors
 * which occur in the transformation of the data or execution of the UDF will be output to a
 * separate errors table in BigQuery. The errors table will be created if it does not exist prior to
 * execution. Both output and error tables are specified by the user as template parameters.
 *
 * <p><b>Pipeline Requirements</b>
 *
 * <ul>
 *   <li>The Pub/Sub topic exists.
 *   <li>The BigQuery output table exists.
 * </ul>
 *
 * <p><b>Example Usage</b>
 *
 * <pre>
 * # Set the pipeline vars
 * PROJECT_ID=PROJECT ID HERE
 * BUCKET_NAME=BUCKET NAME HERE
 * PIPELINE_FOLDER=gs://${BUCKET_NAME}/dataflow/pipelines/pubsub-to-bigquery
 *
 * # Set the runner
 * RUNNER=DataflowRunner
 *
 * # Build the template
 * mvn compile exec:java \
 * -Dexec.mainClass=com.google.cloud.teleport.templates.PubSubToBigQuery \
 * -Dexec.cleanupDaemonThreads=false \
 * -Dexec.args=" \
 * --project=${PROJECT_ID} \
 * --stagingLocation=${PIPELINE_FOLDER}/staging \
 * --tempLocation=${PIPELINE_FOLDER}/temp \
 * --templateLocation=${PIPELINE_FOLDER}/template \
 * --runner=${RUNNER}"
 *
 * # Execute the template
 * JOB_NAME=pubsub-to-bigquery-$USER-`date +"%Y%m%d-%H%M%S%z"`
 *
 * gcloud dataflow jobs run ${JOB_NAME} \
 * --gcs-location=${PIPELINE_FOLDER}/template \
 * --zone=us-east1-d \
 * --parameters \
 * "inputTopic=projects/data-analytics-pocs/topics/teleport-pubsub-to-bigquery,\
 * outputTableSpec=data-analytics-pocs:demo.pubsub_to_bigquery,\
 * outputDeadletterTable=data-analytics-pocs:demo.pubsub_to_bigquery_deadletter"
 * </pre>
 */
public class PubSubToBigQuery {

  /** The log to output status messages to. */
  private static final Logger LOG = LoggerFactory.getLogger(PubSubToBigQuery.class);

  /** The tag for the main output for the UDF. */
  public static final TupleTag<FailsafeElement<PubsubMessage, String>> UDF_OUT =
      new TupleTag<FailsafeElement<PubsubMessage, String>>() {};

  /** The tag for the main output of the json transformation. */
  public static final TupleTag<TableRow> TRANSFORM_OUT = new TupleTag<TableRow>() {};

  /** The tag for the dead-letter output of the udf. */
  public static final TupleTag<FailsafeElement<PubsubMessage, String>> UDF_DEADLETTER_OUT =
      new TupleTag<FailsafeElement<PubsubMessage, String>>() {};

  /** The tag for the dead-letter output of the json to table row transform. */
  public static final TupleTag<FailsafeElement<PubsubMessage, String>> TRANSFORM_DEADLETTER_OUT =
      new TupleTag<FailsafeElement<PubsubMessage, String>>() {};

  /** The default suffix for error tables if dead letter table is not specified. */
  public static final String DEFAULT_DEADLETTER_TABLE_SUFFIX = "_error_records";

  /**
   * The {@link Options} class provides the custom execution options passed by the executor at the
   * command-line.
   */
  public interface Options extends PipelineOptions, JavascriptTextTransformerOptions {
    @Description("Table spec to write the output to")
    ValueProvider<String> getOutputTableSpec();

    void setOutputTableSpec(ValueProvider<String> value);

    @Description("Pub/Sub topic to read the input from")
    ValueProvider<String> getInputTopic();

    void setInputTopic(ValueProvider<String> value);

    @Description(
        "The dead-letter table to output to within BigQuery in <project-id>:<dataset>.<table> "
            + "format. If it doesn't exist, it will be created during pipeline execution.")
    ValueProvider<String> getOutputDeadletterTable();

    void setOutputDeadletterTable(ValueProvider<String> value);
  }

  /**
   * The main entry-point for pipeline execution. This method will start the pipeline but will not
   * wait for it's execution to finish. If blocking execution is required, use the {@link
   * PubSubToBigQuery#run(Options)} method to start the pipeline and invoke {@code
   * result.waitUntilFinish()} on the {@link PipelineResult}.
   *
   * @param args The command-line args passed by the executor.
   */
  public static void main(String[] args) {
    Options options = PipelineOptionsFactory.fromArgs(args).withValidation().as(Options.class);

    run(options);
  }

  /**
   * Runs the pipeline to completion with the specified options. This method does not wait until the
   * pipeline is finished before returning. Invoke {@code result.waitUntilFinish()} on the result
   * object to block until the pipeline is finished running if blocking programmatic execution is
   * required.
   *
   * @param options The execution options.
   * @return The pipeline result.
   */
  public static PipelineResult run(Options options) {

    Pipeline pipeline = Pipeline.create(options);

    // Register the coder for pipeline
    FailsafeElementCoder<PubsubMessage, String> coder =
        FailsafeElementCoder.of(PubsubMessageWithAttributesCoder.of(), StringUtf8Coder.of());

    CoderRegistry coderRegistry = pipeline.getCoderRegistry();
    coderRegistry.registerCoderForType(coder.getEncodedTypeDescriptor(), coder);

    /*
     * Steps:
     *  1) Read messages in from Pub/Sub
     *  2) Transform the PubsubMessages into TableRows
     *     - Transform message payload via UDF
     *     - Convert UDF result to TableRow objects
     *  3) Write successful records out to BigQuery
     *  4) Write failed records out to BigQuery
     */
    PCollectionTuple transformOut =
        pipeline
            /*
             * Step #1: Read messages in from Pub/Sub
             */
            .apply(
                "ReadPubsubMessages",
                PubsubIO.readMessagesWithAttributes().fromTopic(options.getInputTopic()))

            /*
             * Step #2: Transform the PubsubMessages into TableRows
             */
            .apply("ConvertMessageToTableRow", new PubsubMessageToTableRow(options));

    /*
     * Step #3: Write the successful records out to BigQuery
     */
    transformOut
        .get(TRANSFORM_OUT)
        .apply(
            "WriteSuccessfulRecords",
            BigQueryIO.writeTableRows()
                .withoutValidation()
                .withCreateDisposition(CreateDisposition.CREATE_NEVER)
                .withWriteDisposition(WriteDisposition.WRITE_APPEND)
                .to(options.getOutputTableSpec()));

    /*
     * Step #4: Write failed records out to BigQuery
     */
    PCollectionList.of(transformOut.get(UDF_DEADLETTER_OUT))
        .and(transformOut.get(TRANSFORM_DEADLETTER_OUT))
        .apply("Flatten", Flatten.pCollections())
        .apply(
            "WriteFailedRecords",
            WritePubsubMessageErrors.newBuilder()
                .setErrorRecordsTable(
                    ValueProviderUtils.maybeUseDefaultDeadletterTable(
                        options.getOutputDeadletterTable(),
                        options.getOutputTableSpec(),
                        DEFAULT_DEADLETTER_TABLE_SUFFIX))
                .setErrorRecordsTableSchema(ResourceUtils.getDeadletterTableSchemaJson())
                .build());

    return pipeline.run();
  }

  /**
   * If deadletterTable is available, it is returned as is, otherwise outputTableSpec +
   * defaultDeadLetterTableSuffix is returned instead.
   */
  private static ValueProvider<String> maybeUseDefaultDeadletterTable(
      ValueProvider<String> deadletterTable,
      ValueProvider<String> outputTableSpec,
      String defaultDeadLetterTableSuffix) {
    return DualInputNestedValueProvider.of(
        deadletterTable,
        outputTableSpec,
        new SerializableFunction<TranslatorInput<String, String>, String>() {
          @Override
          public String apply(TranslatorInput<String, String> input) {
            String userProvidedTable = input.getX();
            String outputTableSpec = input.getY();
            if (userProvidedTable == null) {
              return outputTableSpec + defaultDeadLetterTableSuffix;
            }
            return userProvidedTable;
          }
        });
  }

  /**
   * The {@link PubsubMessageToTableRow} class is a {@link PTransform} which transforms incoming
   * {@link PubsubMessage} objects into {@link TableRow} objects for insertion into BigQuery while
   * applying an optional UDF to the input. The executions of the UDF and transformation to {@link
   * TableRow} objects is done in a fail-safe way by wrapping the element with it's original payload
   * inside the {@link FailsafeElement} class. The {@link PubsubMessageToTableRow} transform will
   * output a {@link PCollectionTuple} which contains all output and dead-letter {@link
   * PCollection}.
   *
   * <p>The {@link PCollectionTuple} output will contain the following {@link PCollection}:
   *
   * <ul>
   *   <li>{@link PubSubToBigQuery#UDF_OUT} - Contains all {@link FailsafeElement} records
   *       successfully processed by the optional UDF.
   *   <li>{@link PubSubToBigQuery#UDF_DEADLETTER_OUT} - Contains all {@link FailsafeElement}
   *       records which failed processing during the UDF execution.
   *   <li>{@link PubSubToBigQuery#TRANSFORM_OUT} - Contains all records successfully converted from
   *       JSON to {@link TableRow} objects.
   *   <li>{@link PubSubToBigQuery#TRANSFORM_DEADLETTER_OUT} - Contains all {@link FailsafeElement}
   *       records which couldn't be converted to table rows.
   * </ul>
   */
  static class PubsubMessageToTableRow
      extends PTransform<PCollection<PubsubMessage>, PCollectionTuple> {

    private final Options options;

    PubsubMessageToTableRow(Options options) {
      this.options = options;
    }

    @Override
    public PCollectionTuple expand(PCollection<PubsubMessage> input) {

      PCollectionTuple udfOut =
          input
              // Map the incoming messages into FailsafeElements so we can recover from failures
              // across multiple transforms.
              .apply("MapToRecord", ParDo.of(new PubsubMessageToFailsafeElementFn()))
              .apply(
                  "InvokeUDF",
                  FailsafeJavascriptUdf.<PubsubMessage>newBuilder()
                      .setFileSystemPath(options.getJavascriptTextTransformGcsPath())
                      .setFunctionName(options.getJavascriptTextTransformFunctionName())
                      .setSuccessTag(UDF_OUT)
                      .setFailureTag(UDF_DEADLETTER_OUT)
                      .build());

      // Convert the records which were successfully processed by the UDF into TableRow objects.
      PCollectionTuple jsonToTableRowOut =
          udfOut
              .get(UDF_OUT)
              .apply(
                  "JsonToTableRow",
                  FailsafeJsonToTableRow.<PubsubMessage>newBuilder()
                      .setSuccessTag(TRANSFORM_OUT)
                      .setFailureTag(TRANSFORM_DEADLETTER_OUT)
                      .build());

      // Re-wrap the PCollections so we can return a single PCollectionTuple
      return PCollectionTuple.of(UDF_OUT, udfOut.get(UDF_OUT))
          .and(UDF_DEADLETTER_OUT, udfOut.get(UDF_DEADLETTER_OUT))
          .and(TRANSFORM_OUT, jsonToTableRowOut.get(TRANSFORM_OUT))
          .and(TRANSFORM_DEADLETTER_OUT, jsonToTableRowOut.get(TRANSFORM_DEADLETTER_OUT));
    }
  }

  /**
   * The {@link PubsubMessageToFailsafeElementFn} wraps an incoming {@link PubsubMessage} with the
   * {@link FailsafeElement} class so errors can be recovered from and the original message can be
   * output to a error records table.
   */
  static class PubsubMessageToFailsafeElementFn
      extends DoFn<PubsubMessage, FailsafeElement<PubsubMessage, String>> {
    @ProcessElement
    public void processElement(ProcessContext context) {
      PubsubMessage message = context.element();
      context.output(
          FailsafeElement.of(message, new String(message.getPayload(), StandardCharsets.UTF_8)));
    }
  }
}

Python

Python source code is not available.

Java Database Connectivity (JDBC) to BigQuery

The JDBC to BigQuery template is a batch pipeline that copies data from a relational database table into an existing BigQuery table. This pipeline uses JDBC to connect to the relational database. You can use this template to copy data from any relational database with available JDBC drivers into BigQuery.

Requirements for this pipeline:

The JDBC drivers for the relational database must be available.
The BigQuery table must exist prior to pipeline execution.
The BigQuery table must have a compatible schema.
The relational database must be accessible from the subnet where Cloud Dataflow executes.

Template parameters

Parameter	Description
`driverJars`	Comma separated list of driver jars. For example, `gs://<my-bucket>/driver_jar1.jar,gs://<my-bucket>/driver_jar2.jar`.
`driverClassName`	The JDBC driver class name. For example, `com.mysql.jdbc.Driver`.
`connectionURL`	The JDBC connection URL string. For example, `jdbc:mysql://some-host:3306/sampledb`.
`query`	Query to be executed on the source to extract the data. For example, `select * from sampledb.sample_table`.
`outputTable`	The BigQuery output table location, in the format of `<my-project>:<my-dataset>.<my-table>`.
`bigQueryLoadingTemporaryDirectory`	Temporary directory for BigQuery loading process. For example, `gs://<my-bucket>/my-files/temp_dir`.
`connectionProperties`	[Optional] Properties string to use for the JDBC connection. For example, `unicode=true&characterEncoding=UTF-8`.
`username`	[Optional] User name to be used for the JDBC connection.
`password`	[Optional] Password to be used for the JDBC connection.

Executing the JDBC to BigQuery template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the JDBC to BigQuery template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Jdbc_to_BigQuery

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace DRIVER_PATHS with the comma separated Cloud Storage path(s) of the JDBC driver(s).
Replace DRIVER_CLASS_NAME with the drive class name.
Replace JDBC_CONNECTION_URL with the JDBC connection URL.
Replace SOURCE_SQL_QUERY with the SQL query to be executed on the source database.
Replace YOUR_DATASET with your BigQuery dataset, and replace YOUR_TABLE_NAME with your BigQuery table name.
Replace PATH_TO_TEMP_DIR_ON_GCS with your Cloud Storage path to the temp directory.
Replace CONNECTION_PROPERTIES with the JDBC connection properties if required.
Replace CONNECTION_USERNAME with the JDBC connection username.
Replace CONNECTION_PASSWORD with the JDBC connection password.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/Jdbc_to_BigQuery \
    --parameters \
driverJars=DRIVER_PATHS,\
driverClassName=DRIVER_CLASS_NAME,\
connectionURL=JDBC_CONNECTION_URL,\
query=SOURCE_SQL_QUERY,\
outputTable=YOUR_PROJECT_ID:YOUR_DATASET.YOUR_TABLE_NAME,
bigQueryLoadingTemporaryDirectory=PATH_TO_TEMP_DIR_ON_GCS,\
connectionProperties=CONNECTION_PROPERTIES,\
username=CONNECTION_USERNAME,\
password=CONNECTION_PASSWORD

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Jdbc_to_BigQuery

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace DRIVER_PATHS with the comma separated Cloud Storage path(s) of the JDBC driver(s).
Replace DRIVER_CLASS_NAME with the drive class name.
Replace JDBC_CONNECTION_URL with the JDBC connection URL.
Replace SOURCE_SQL_QUERY with the SQL query to be executed on the source database.
Replace YOUR_DATASET with your BigQuery dataset, and replace YOUR_TABLE_NAME with your BigQuery table name.
Replace PATH_TO_TEMP_DIR_ON_GCS with your Cloud Storage path to the temp directory.
Replace CONNECTION_PROPERTIES with the JDBC connection properties if required.
Replace CONNECTION_USERNAME with the JDBC connection username.
Replace CONNECTION_PASSWORD with the JDBC connection password.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/Jdbc_to_BigQuery
{
   "jobName": "JOB_NAME",
   "parameters": {
       "driverJars": "DRIVER_PATHS",
       "driverClassName": "DRIVER_CLASS_NAME",
       "connectionURL": "JDBC_CONNECTION_URL",
       "query": "SOURCE_SQL_QUERY",
       "outputTable": "YOUR_PROJECT_ID:YOUR_DATASET.YOUR_TABLE_NAME",
       "bigQueryLoadingTemporaryDirectory": "PATH_TO_TEMP_DIR_ON_GCS",
       "connectionProperties": "CONNECTION_PROPERTIES",
       "username": "CONNECTION_USERNAME",
       "password": "CONNECTION_PASSWORD"
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.cloud.teleport.templates;

import com.google.api.services.bigquery.model.TableRow;
import com.google.cloud.teleport.io.DynamicJdbcIO;
import com.google.cloud.teleport.templates.common.JdbcConverters;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.PipelineResult;
import org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO;
import org.apache.beam.sdk.io.gcp.bigquery.TableRowJsonCoder;
import org.apache.beam.sdk.options.PipelineOptionsFactory;

/**
 * A template that copies data from a relational database using JDBC to an existing BigQuery table.
 */
public class JdbcToBigQuery {

  /**
   * Main entry point for executing the pipeline. This will run the pipeline asynchronously. If
   * blocking execution is required, use the {@link
   * JdbcToBigQuery#run(JdbcConverters.JdbcToBigQueryOptions)} method to start the pipeline and
   * invoke {@code result.waitUntilFinish()} on the {@link PipelineResult}
   *
   * @param args The command-line arguments to the pipeline.
   */
  public static void main(String[] args) {

    // Parse the user options passed from the command-line
    JdbcConverters.JdbcToBigQueryOptions options =
        PipelineOptionsFactory.fromArgs(args)
            .withValidation()
            .as(JdbcConverters.JdbcToBigQueryOptions.class);

    run(options);
  }

  /**
   * Runs the pipeline with the supplied options.
   *
   * @param options The execution parameters to the pipeline.
   * @return The result of the pipeline execution.
   */
  private static PipelineResult run(JdbcConverters.JdbcToBigQueryOptions options) {
    // Create the pipeline
    Pipeline pipeline = Pipeline.create(options);

    /*
     * Steps: 1) Read records via JDBC and convert to TableRow via RowMapper
     *        2) Append TableRow to BigQuery via BigQueryIO
     */
    pipeline
        /*
         * Step 1: Read records via JDBC and convert to TableRow
         *         via {@link org.apache.beam.sdk.io.jdbc.JdbcIO.RowMapper}
         */
        .apply(
            "Read from JdbcIO",
            DynamicJdbcIO.<TableRow>read()
                .withDataSourceConfiguration(
                    DynamicJdbcIO.DynamicDataSourceConfiguration.create(
                            options.getDriverClassName(), options.getConnectionURL())
                        .withUsername(options.getUsername())
                        .withPassword(options.getPassword())
                        .withDriverJars(options.getDriverJars())
                        .withConnectionProperties(options.getConnectionProperties()))
                .withQuery(options.getQuery())
                .withCoder(TableRowJsonCoder.of())
                .withRowMapper(JdbcConverters.getResultSetToTableRow()))
        /*
         * Step 2: Append TableRow to an existing BigQuery table
         */
        .apply(
            "Write to BigQuery",
            BigQueryIO.writeTableRows()
                .withoutValidation()
                .withCreateDisposition(BigQueryIO.Write.CreateDisposition.CREATE_NEVER)
                .withWriteDisposition(BigQueryIO.Write.WriteDisposition.WRITE_APPEND)
                .withCustomGcsTempLocation(options.getBigQueryLoadingTemporaryDirectory())
                .to(options.getOutputTable()));

    // Execute the pipeline and return the result.
    return pipeline.run();
  }
}

Python

Python source code is not available.

Cloud Storage Text to Cloud Pub/Sub (Batch)

This template creates a batch pipeline that reads records from text files stored in Cloud Storage and publishes them to a Cloud Pub/Sub topic. The template can be used to publish records in a newline-delimited file containing JSON records or CSV file to a Cloud Pub/Sub topic for real-time processing. You can use this template to replay data to Cloud Pub/Sub.

Note that this template does not set any timestamp on the individual records, so the event time will be equal to the publishing time during execution. If your pipeline is reliant on an accurate event time for processing, you should not use this pipeline.

Requirements for this pipeline:

The files to read need to be in newline-delimited JSON or CSV format. Records spanning multiple lines in the source files may cause issues downstream as each line within the files will be published as a message to Cloud Pub/Sub.
The Cloud Pub/Sub topic must exist prior to execution.

Template parameters

Parameter	Description
`inputFilePattern`	The input file pattern to read from. For example, `gs://bucket-name/files/*.json`.
`outputTopic`	The Cloud Pub/Sub input topic to write to. The name should be in the format of `projects/<project-id>/topics/<topic-name>`.

Executing the Cloud Storage Text to Cloud Pub/Sub (Batch) template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Storage Text to Cloud Pub/Sub (Batch) template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/GCS_Text_to_Cloud_PubSub

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_TOPIC_NAME with your Cloud Pub/Sub topic name.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/GCS_Text_to_Cloud_PubSub \
    --parameters \
inputFilePattern=gs://YOUR_BUCKET_NAME/files/*.json,\
outputTopic=projects/YOUR_PROJECT_ID/topics/YOUR_TOPIC_NAME

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/GCS_Text_to_Cloud_PubSub

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_TOPIC_NAME with your Cloud Pub/Sub topic name.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/GCS_Text_to_Cloud_PubSub
{
   "jobName": "JOB_NAME",
   "parameters": {
       "inputFilePattern": "gs://YOUR_BUCKET_NAME/files/*.json",
       "outputTopic": "projects/YOUR_PROJECT_ID/topics/YOUR_TOPIC_NAME"
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */


package com.google.cloud.teleport.templates;

import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.PipelineResult;
import org.apache.beam.sdk.io.TextIO;
import org.apache.beam.sdk.io.gcp.pubsub.PubsubIO;
import org.apache.beam.sdk.options.Description;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.options.Validation.Required;
import org.apache.beam.sdk.options.ValueProvider;

/**
 * The {@code TextToPubsub} pipeline publishes records to
 * Cloud Pub/Sub from a set of files. The pipeline reads each
 * file row-by-row and publishes each record as a string message.
 * At the moment, publishing messages with attributes is unsupported.
 *
 * <p>Example Usage:
 *
 * <pre>
 * {@code mvn compile exec:java \
    -Dexec.mainClass=com.google.cloud.teleport.templates.TextToPubsub \
    -Dexec.args=" \
    --project=${PROJECT_ID} \
    --stagingLocation=gs://${PROJECT_ID}/dataflow/pipelines/${PIPELINE_FOLDER}/staging \
    --tempLocation=gs://${PROJECT_ID}/dataflow/pipelines/${PIPELINE_FOLDER}/temp \
    --runner=DataflowRunner \
    --inputFilePattern=gs://path/to/demo_file.csv \
    --outputTopic=projects/${PROJECT_ID}/topics/${TOPIC_NAME}"
 * }
 * </pre>
 *
 */
public class TextToPubsub {

  /**
   * The custom options supported by the pipeline. Inherits
   * standard configuration options.
   */
  public interface Options extends PipelineOptions {
    @Description("The file pattern to read records from (e.g. gs://bucket/file-*.csv)")
    @Required
    ValueProvider<String> getInputFilePattern();
    void setInputFilePattern(ValueProvider<String> value);

    @Description("The name of the topic which data should be published to. "
        + "The name should be in the format of projects/<project-id>/topics/<topic-name>.")
    @Required
    ValueProvider<String> getOutputTopic();
    void setOutputTopic(ValueProvider<String> value);
  }

  /**
   * Main entry-point for the pipeline. Reads in the
   * command-line arguments, parses them, and executes
   * the pipeline.
   *
   * @param args  Arguments passed in from the command-line.
   */
  public static void main(String[] args) {

    // Parse the user options passed from the command-line
    Options options = PipelineOptionsFactory
        .fromArgs(args)
        .withValidation()
        .as(Options.class);

    run(options);
  }

  /**
   * Executes the pipeline with the provided execution
   * parameters.
   *
   * @param options The execution parameters.
   */
  public static PipelineResult run(Options options) {
    // Create the pipeline.
    Pipeline pipeline = Pipeline.create(options);

    /*
     * Steps:
     *  1) Read from the text source.
     *  2) Write each text record to Pub/Sub
     */
    pipeline
        .apply("Read Text Data", TextIO.read().from(options.getInputFilePattern()))
        .apply("Write to PubSub", PubsubIO.writeStrings().to(options.getOutputTopic()));

    return pipeline.run();
  }
}

Python

Python source code is not available.

Cloud Storage Text to Cloud Pub/Sub (Stream)

This template creates a streaming pipeline that continuously polls for new text files uploaded to Cloud Storage, reads each file line by line, and publishes strings to a Cloud Pub/Sub topic. The template publishes records in a newline-delimited file containing JSON records or CSV file to a Cloud Pub/Sub topic for real-time processing. You can use this template to replay data to Cloud Pub/Sub.

Currently, the polling interval is fixed and set to 10 seconds. This template does not set any timestamp on the individual records, so the event time will be equal to the publishing time during execution. If your pipeline relies on an accurate event time for processing, you should not use this pipeline.

Requirements for this pipeline:

Input files must be in newline-delimited JSON or CSV format. Records that span multiple lines in the source files can cause issues downstream, as each line within the files will be published as a message to Cloud Pub/Sub.
The Cloud Pub/Sub topic must exist prior to execution.
The pipeline runs indefinitely and needs to be terminated manually.

Template parameters

Parameter	Description
`inputFilePattern`	The input file pattern to read from. For example, `gs://bucket-name/files/*.json`.
`outputTopic`	The Cloud Pub/Sub input topic to write to. The name should be in the format of `projects/<project-id>/topics/<topic-name>`.

Executing the Cloud Storage Text to Cloud Pub/Sub (Stream) template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Storage Text to Cloud Pub/Sub (Stream) template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Stream_GCS_Text_to_Cloud_PubSub

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_TOPIC_NAME with your Cloud Pub/Sub topic name.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/Stream_GCS_Text_to_Cloud_PubSub \
    --parameters \
inputFilePattern=gs://YOUR_BUCKET_NAME/files/*.json,\
outputTopic=projects/YOUR_PROJECT_ID/topics/YOUR_TOPIC_NAME

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Stream_GCS_Text_to_Cloud_PubSub

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_TOPIC_NAME with your Cloud Pub/Sub topic name.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/Stream_GCS_Text_to_Cloud_PubSub
{
   "jobName": "JOB_NAME",
   "parameters": {
       "inputFilePattern": "gs://YOUR_BUCKET_NAME/files/*.json",
       "outputTopic": "projects/YOUR_PROJECT_ID/topics/YOUR_TOPIC_NAME"
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.cloud.teleport.templates;

import com.google.cloud.teleport.templates.TextToPubsub.Options;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.PipelineResult;
import org.apache.beam.sdk.io.TextIO;
import org.apache.beam.sdk.io.gcp.pubsub.PubsubIO;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.transforms.Watch;
import org.joda.time.Duration;

/**
 * The {@code TextToPubsubStream} is a streaming version of {@code TextToPubsub} pipeline that
 * publishes records to Cloud Pub/Sub from a set of files. The pipeline continuously polls for new
 * files, reads them row-by-row and publishes each record as a string message. The polling interval
 * is fixed and equals to 10 seconds. At the moment, publishing messages with attributes is
 * unsupported.
 *
 * <p>Example Usage:
 *
 * <pre>
 * {@code mvn compile exec:java \
-Dexec.mainClass=com.google.cloud.teleport.templates.TextToPubsubStream \
-Dexec.args=" \
--project=${PROJECT_ID} \
--stagingLocation=gs://${STAGING_BUCKET}/dataflow/pipelines/${PIPELINE_FOLDER}/staging \
--tempLocation=gs://${STAGING_BUCKET}/dataflow/pipelines/${PIPELINE_FOLDER}/temp \
--runner=DataflowRunner \
--inputFilePattern=gs://path/to/*.csv \
--outputTopic=projects/${PROJECT_ID}/topics/${TOPIC_NAME}"
 * }
 * </pre>
 *
 */
public class TextToPubsubStream extends TextToPubsub {
  private static final Duration DEFAULT_POLL_INTERVAL = Duration.standardSeconds(10);

  /**
   * Main entry-point for the pipeline. Reads in the
   * command-line arguments, parses them, and executes
   * the pipeline.
   *
   * @param args  Arguments passed in from the command-line.
   */
  public static void main(String[] args) {

    // Parse the user options passed from the command-line
    Options options = PipelineOptionsFactory
      .fromArgs(args)
      .withValidation()
      .as(Options.class);

    run(options);
  }

  /**
   * Executes the pipeline with the provided execution
   * parameters.
   *
   * @param options The execution parameters.
   */
  public static PipelineResult run(Options options) {
    // Create the pipeline.
    Pipeline pipeline = Pipeline.create(options);

    /*
     * Steps:
     *  1) Read from the text source.
     *  2) Write each text record to Pub/Sub
     */
    pipeline
      .apply(
        "Read Text Data",
        TextIO.read()
          .from(options.getInputFilePattern())
          .watchForNewFiles(DEFAULT_POLL_INTERVAL, Watch.Growth.never()))
      .apply("Write to PubSub", PubsubIO.writeStrings().to(options.getOutputTopic()));

    return pipeline.run();
  }
}

Python

Python source code is not available.

Cloud Pub/Sub to Cloud Storage Text

The Cloud Pub/Sub to Cloud Storage Text template is a streaming pipeline that reads records from Cloud Pub/Sub and saves them as a series of Cloud Storage files in text format. The template can be used as a quick way to save data in Cloud Pub/Sub for future use. By default, the template generates a new file every 5 minutes.

Requirements for this pipeline:

The Cloud Pub/Sub topic must exist prior to execution.
The messages published to the topic must be in text format.
The messages published to the topic must not contain any newlines. Note that each Cloud Pub/Sub message is saved as a single line in the output file.

Template parameters

Parameter	Description
`inputTopic`	The Cloud Pub/Sub topic to read the input from. The topic name should be in the format `projects/<project-id>/topics/<topic-name>`.
`outputDirectory`	The path and filename prefix for writing output files. For example, `gs://bucket-name/path/`. This value must end in a slash.
`outputFilenamePrefix`	The prefix to place on each windowed file. For example, `output-`
`outputFilenameSuffix`	The suffix to place on each windowed file, typically a file extension such as `.txt` or `.csv`.
`outputShardTemplate`	The shard template defines the dynamic portion of each windowed file. By default, the pipeline uses a single shard for output to the file system within each window. This means that all data will land into a single file per window. The `outputShardTemplate` defaults to `W-P-SS-of-NN` where `W` is the window date range, `P` is the pane info, `S` is the shard number, and `N` is the number of shards. In case of a single file, the `SS-of-NN` portion of the `outputShardTemplate` will be `00-of-01`.

Executing the Cloud Pub/Sub to Cloud Storage Text template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Pub/Sub to Cloud Storage Text template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Cloud_PubSub_to_GCS_Text

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_TOPIC_NAME with your Cloud Pub/Sub topic name.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/Cloud_PubSub_to_GCS_Text \
    --parameters \
inputTopic=projects/YOUR_PROJECT_ID/topics/YOUR_TOPIC_NAME,\
outputDirectory=gs://YOUR_BUCKET_NAME/output/,\
outputFilenamePrefix=output-,\
outputFilenameSuffix=.txt

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Cloud_PubSub_to_GCS_Text

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_TOPIC_NAME with your Cloud Pub/Sub topic name.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/Cloud_PubSub_to_GCS_Text
{
   "jobName": "JOB_NAME",
   "parameters": {
       "inputTopic": "projects/YOUR_PROJECT_ID/topics/YOUR_TOPIC_NAME"
       "outputDirectory": "gs://YOUR_BUCKET_NAME/output/",
       "outputFilenamePrefix": "output-",
       "outputFilenameSuffix": ".txt",
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */



package com.google.cloud.teleport.templates;

import com.google.cloud.teleport.io.WindowedFilenamePolicy;
import com.google.cloud.teleport.util.DurationUtils;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.PipelineResult;
import org.apache.beam.sdk.io.FileBasedSink;
import org.apache.beam.sdk.io.TextIO;
import org.apache.beam.sdk.io.fs.ResourceId;
import org.apache.beam.sdk.io.gcp.pubsub.PubsubIO;
import org.apache.beam.sdk.options.Default;
import org.apache.beam.sdk.options.Description;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.options.StreamingOptions;
import org.apache.beam.sdk.options.Validation.Required;
import org.apache.beam.sdk.options.ValueProvider;
import org.apache.beam.sdk.options.ValueProvider.NestedValueProvider;
import org.apache.beam.sdk.transforms.SerializableFunction;
import org.apache.beam.sdk.transforms.windowing.FixedWindows;
import org.apache.beam.sdk.transforms.windowing.Window;

/**
 * This pipeline ingests incoming data from a Cloud Pub/Sub topic and
 * outputs the raw data into windowed files at the specified output
 * directory.
 *
 * <p> Example Usage:
 *
 * <pre>
 * mvn compile exec:java \
 -Dexec.mainClass=com.google.cloud.teleport.templates.${PIPELINE_NAME} \
 -Dexec.cleanupDaemonThreads=false \
 -Dexec.args=" \
 --project=${PROJECT_ID} \
 --stagingLocation=gs://${PROJECT_ID}/dataflow/pipelines/${PIPELINE_FOLDER}/staging \
 --tempLocation=gs://${PROJECT_ID}/dataflow/pipelines/${PIPELINE_FOLDER}/temp \
 --runner=DataflowRunner \
 --windowDuration=2m \
 --numShards=1 \
 --inputTopic=projects/${PROJECT_ID}/topics/windowed-files \
 --outputDirectory=gs://${PROJECT_ID}/temp/ \
 --outputFilenamePrefix=windowed-file \
 --outputFilenameSuffix=.txt"
 * </pre>
 * </p>
 */
public class PubsubToText {

  /**
   * Options supported by the pipeline.
   *
   * <p>Inherits standard configuration options.</p>
   */
  public interface Options extends PipelineOptions, StreamingOptions {
    @Description("The Cloud Pub/Sub topic to read from.")
    @Required
    ValueProvider<String> getInputTopic();
    void setInputTopic(ValueProvider<String> value);

    @Description("The directory to output files to. Must end with a slash.")
    @Required
    ValueProvider<String> getOutputDirectory();
    void setOutputDirectory(ValueProvider<String> value);

    @Description("The filename prefix of the files to write to.")
    @Default.String("output")
    @Required
    ValueProvider<String> getOutputFilenamePrefix();
    void setOutputFilenamePrefix(ValueProvider<String> value);

    @Description("The suffix of the files to write.")
    @Default.String("")
    ValueProvider<String> getOutputFilenameSuffix();
    void setOutputFilenameSuffix(ValueProvider<String> value);

    @Description("The shard template of the output file. Specified as repeating sequences "
        + "of the letters 'S' or 'N' (example: SSS-NNN). These are replaced with the "
        + "shard number, or number of shards respectively")
    @Default.String("W-P-SS-of-NN")
    ValueProvider<String> getOutputShardTemplate();
    void setOutputShardTemplate(ValueProvider<String> value);

    @Description("The maximum number of output shards produced when writing.")
    @Default.Integer(1)
    Integer getNumShards();
    void setNumShards(Integer value);

    @Description("The window duration in which data will be written. Defaults to 5m. "
        + "Allowed formats are: "
        + "Ns (for seconds, example: 5s), "
        + "Nm (for minutes, example: 12m), "
        + "Nh (for hours, example: 2h).")
    @Default.String("5m")
    String getWindowDuration();
    void setWindowDuration(String value);
  }

  /**
   * Main entry point for executing the pipeline.
   * @param args  The command-line arguments to the pipeline.
   */
  public static void main(String[] args) {

    Options options = PipelineOptionsFactory
        .fromArgs(args)
        .withValidation()
        .as(Options.class);

    options.setStreaming(true);

    run(options);
  }

  /**
   * Runs the pipeline with the supplied options.
   *
   * @param options The execution parameters to the pipeline.
   * @return  The result of the pipeline execution.
   */
  public static PipelineResult run(Options options) {
    // Create the pipeline
    Pipeline pipeline = Pipeline.create(options);

    /*
     * Steps:
     *   1) Read string messages from PubSub
     *   2) Window the messages into minute intervals specified by the executor.
     *   3) Output the windowed files to GCS
     */
    pipeline
        .apply("Read PubSub Events", PubsubIO.readStrings().fromTopic(options.getInputTopic()))
        .apply(
            options.getWindowDuration() + " Window",
            Window.into(FixedWindows.of(DurationUtils.parseDuration(options.getWindowDuration()))))

        // Apply windowed file writes. Use a NestedValueProvider because the filename
        // policy requires a resourceId generated from the input value at runtime.
        .apply(
            "Write File(s)",
            TextIO.write()
                .withWindowedWrites()
                .withNumShards(options.getNumShards())
                .to(
                    new WindowedFilenamePolicy(
                        options.getOutputDirectory(),
                        options.getOutputFilenamePrefix(),
                        options.getOutputShardTemplate(),
                        options.getOutputFilenameSuffix()))
                .withTempDirectory(NestedValueProvider.of(
                    options.getOutputDirectory(),
                    (SerializableFunction<String, ResourceId>) input ->
                        FileBasedSink.convertToFileResourceIfPossible(input))));

    // Execute the pipeline and return the result.
    return pipeline.run();
  }
}

Python

Python source code is not available.

Cloud Pub/Sub to Cloud Pub/Sub

The Cloud Pub/Sub to Cloud Pub/Sub template is a streaming pipeline that reads messages from a Cloud Pub/Sub subscription and writes the messages to another Cloud Pub/Sub topic. The pipeline also accepts an optional message attribute key and a value that can be used to filter the messages that should be written to the Cloud Pub/Sub topic. You can use this template to copy messages from a Cloud Pub/Sub subscription to another Cloud Pub/Sub topic with an optional message filter.

Requirements for this pipeline:

The source Cloud Pub/Sub subscription must exist prior to execution.
The destination Cloud Pub/Sub topic must exist prior to execution.

Template parameters

Parameter	Description
`inputSubscription`	Cloud Pub/Sub subscription to read the input from. For example, `projects/<project-id>/subscriptions/<subscription-name>`.
`outputTopic`	Cloud Pub/Sub topic to write the output to. For example, `projects/<project-id>/topics/<topic-name>`.
`filterKey`	[Optional] Filter events based on an attribute key. No filters are applied if `filterKey` is not specified.
`filterValue`	[Optional] Filter attribute value to use in case a filterKey is provided. A null `filterValue` is used by default.

Executing the Cloud Pub/Sub to Cloud Pub/Sub template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Pub/Sub to Cloud Pub/Sub template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Cloud_PubSub_to_Cloud_PubSub

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_SUBSCRIPTION_NAME with the Cloud Pub/Sub subscription name.
Replace YOUR_TOPIC_NAME with the Cloud Pub/Sub topic name.
Replace FILTER_KEY with the name of the attribute key to filter messages with.
Replace FILTER_VALUE with the attribute value.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/Cloud_PubSub_to_Cloud_PubSub \
    --parameters \
inputSubscription=projects/YOUR_PROJECT_ID/subscriptions/YOUR_SUBSCRIPTION_NAME,\
outputTopic=projects/YOUR_PROJECT_ID/topics/YOUR_TOPIC_NAME,\
filterKey=FILTER_KEY,\
filterValue=FILTER_VALUE

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Cloud_PubSub_to_Cloud_PubSub

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_SUBSCRIPTION_NAME with the Cloud Pub/Sub subscription name.
Replace YOUR_TOPIC_NAME with the Cloud Pub/Sub topic name.
Replace FILTER_KEY with the name of the attribute key to filter messages with.
Replace FILTER_VALUE with the attribute value.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/Cloud_PubSub_to_Cloud_PubSub
{
   "jobName": "JOB_NAME",
   "parameters": {
       "inputSubscription": "projects/YOUR_PROJECT_ID/subscriptions/YOUR_SUBSCRIPTION_NAME",
       "outputTopic": "projects/YOUR_PROJECT_ID/topics/YOUR_TOPIC_NAME",
       "filterKey": "FILTER_KEY",
       "filterValue": "FILTER_VALUE"
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */


package com.google.cloud.teleport.templates;

import java.util.Objects;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.PipelineResult;
import org.apache.beam.sdk.io.gcp.pubsub.PubsubIO;
import org.apache.beam.sdk.io.gcp.pubsub.PubsubMessage;
import org.apache.beam.sdk.options.Description;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.options.StreamingOptions;
import org.apache.beam.sdk.options.Validation;
import org.apache.beam.sdk.options.ValueProvider;
import org.apache.beam.sdk.transforms.DoFn;
import org.apache.beam.sdk.transforms.ParDo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/** An template that copies messages from one Pubsub subscription to another Pubsub topic. */
public class PubsubToPubsub {

  /**
   * Options supported by {@link PubsubToPubsub}.
   *
   * <p>Inherits standard configuration options.
   */
  public interface Options extends PipelineOptions, StreamingOptions {
    @Description(
        "The Cloud Pub/Sub subscription to consume from. "
            + "The name should be in the format of "
            + "projects/<project-id>/subscriptions/<subscription-name>.")
    @Validation.Required
    ValueProvider<String> getInputSubscription();

    void setInputSubscription(ValueProvider<String> inputSubscription);

    @Description(
        "The Cloud Pub/Sub topic to publish to. "
            + "The name should be in the format of "
            + "projects/<project-id>/topics/<topic-name>.")
    @Validation.Required
    ValueProvider<String> getOutputTopic();

    void setOutputTopic(ValueProvider<String> outputTopic);

    @Description(
        "Filter events based on an optional attribute key. "
            + "No filters are applied if a filterKey is not specified.")
    @Validation.Required
    ValueProvider<String> getFilterKey();

    void setFilterKey(ValueProvider<String> filterKey);

    @Description(
        "Filter attribute value to use in case a filterKey is provided. "
            + "A null filterValue is used by default.")
    @Validation.Required
    ValueProvider<String> getFilterValue();

    void setFilterValue(ValueProvider<String> filterValue);
  }

  /**
   * DoFn that will determine if events are to be filtered. If filtering is enabled, it will only
   * publish events that pass the filter else, it will publish all input events.
   */
  public static class ExtractAndFilterEventsFn extends DoFn<PubsubMessage, PubsubMessage> {

    private Boolean doFilter;
    private String inputFilterKey;
    private String inputFilterValue;
    private static final Logger LOG = LoggerFactory.getLogger(ExtractAndFilterEventsFn.class);

    @StartBundle
    public void startBundle(StartBundleContext context) {
      if (this.doFilter != null) {
        return; // Filter has been evaluated already
      }

      Options options = context.getPipelineOptions().as(Options.class);

      inputFilterKey = (options.getFilterKey() == null ? null : options.getFilterKey().get());
      inputFilterValue = (options.getFilterValue() == null ? null : options.getFilterValue().get());

      if (inputFilterKey == null) {
        this.doFilter = false;
      } else {
        this.doFilter = true;
        LOG.info(
            "Enabling event filter [key: " + inputFilterKey + "][value: " + inputFilterValue + "]");
      }
    }

    @ProcessElement
    public void processElement(ProcessContext context) {
      if (!this.doFilter) {
        // Filter is not enabled
        context.output(context.element());
      } else {
        PubsubMessage message = context.element();
        String extractedValue = message.getAttribute(this.inputFilterKey);
        if (Objects.equals(extractedValue, this.inputFilterValue)) {
          context.output(message);
        }
      }
    }
  }

  /**
   * Main entry point for executing the pipeline.
   *
   * @param args The command-line arguments to the pipeline.
   */
  public static void main(String[] args) {

    // Parse the user options passed from the command-line
    Options options = PipelineOptionsFactory.fromArgs(args).withValidation().as(Options.class);

    options.setStreaming(true);

    run(options);
  }

  /**
   * Runs the pipeline with the supplied options.
   *
   * @param options The execution parameters to the pipeline.
   * @return The result of the pipeline execution.
   */
  public static PipelineResult run(Options options) {
    // Create the pipeline
    Pipeline pipeline = Pipeline.create(options);

    /**
     * Steps: 1) Read PubSubMessage with attributes from input PubSub subscription.
     *        2) Apply any filters if an attribute=value pair is provided.
     *        3) Write each PubSubMessage to output PubSub topic.
     */
    pipeline
        .apply(
            "Read PubSub Events",
            PubsubIO.readMessagesWithAttributes().fromSubscription(options.getInputSubscription()))
        .apply("Filter Events If Enabled", ParDo.of(new ExtractAndFilterEventsFn()))
        .apply("Write PubSub Events", PubsubIO.writeMessages().to(options.getOutputTopic()));

    // Execute the pipeline and return the result.
    return pipeline.run();
  }
}

Python

Python source code is not available.

Cloud Pub/Sub to Cloud Storage Avro

The Cloud Pub/Sub to Cloud Storage Avro template is a streaming pipeline that reads data from a Cloud Pub/Sub topic and writes Avro files into the specified Cloud Storage bucket. This pipeline supports optional user provided window duration to be used to perform windowed writes.

Requirements for this pipeline:

The input Cloud Pub/Sub topic must exist prior to pipeline execution.

Template parameters

Parameter	Description
`inputTopic`	Cloud Pub/Sub Topic to subscribe for message consumption. The topic name should be in the format of `projects/<project-id>/topics/<topic-name>`.
`outputDirectory`	Output Directory where output Avro Files will be archived. Please add / at the end. For eg: `gs://example-bucket/example-directory/`.
`avroTempDirectory`	Directory for temporary Avro Files. Please add / at the end. For eg: `gs://example-bucket/example-directory/`.
`outputFilenamePrefix`	[Optional] Output Filename Prefix for the Avro Files.
`outputFilenameSuffix`	[Optional] Output Filename Suffix for the Avro Files.
`outputShardTemplate`	[Optional] The shard template of the output file. Specified as repeating sequences of the letters 'S' or 'N' (example: SSS-NNN). These are replaced with the shard number, or number of shards respectively. Default Template Format is 'W-P-SS-of-NN' when this parameter is not specified.
`numShards`	[Optional] The maximum number of output shards produced when writing.Default maximum number of Shards is 1.
`windowDuration`	[Optional] The window duration in which data will be written. Defaults to 5m. Allowed formats are: Ns (for seconds, example: 5s), Nm (for minutes, example: 12m), Nh (for hours, example: 2h).

Executing the Cloud Pub/Sub to Cloud Storage Avro template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Pub/Sub to Cloud Storage Avro template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Cloud_PubSub_to_Avro

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_TOPIC_NAME with the Cloud Pub/Sub topic name.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.
Replace FILENAME_PREFIX with the preferred output filename prefix.
Replace FILENAME_SUFFIX with the preferred output filename suffix.
Replace SHARD_TEMPLATE with the preferred output shard template.
Replace NUM_SHARDS with the number of output shards.
Replace WINDOW_DURATION with the output window duration.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/Cloud_PubSub_to_Avro \
    --parameters \
inputTopic=projects/YOUR_PROJECT_ID/topics/YOUR_TOPIC_NAME,\
outputDirectory=gs://YOUR_BUCKET_NAME/output/,\
avroTempDirectory=gs://YOUR_BUCKET_NAME/temp/,\
outputFilenamePrefix=FILENAME_PREFIX,\
outputFilenameSuffix=FILENAME_SUFFIX,\
outputShardTemplate=SHARD_TEMPLATE,\
numShards=NUM_SHARDS,\
windowDuration=WINDOW_DURATION

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Cloud_PubSub_to_Avro

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_TOPIC_NAME with the Cloud Pub/Sub topic name.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.
Replace FILENAME_PREFIX with the preferred output filename prefix.
Replace FILENAME_SUFFIX with the preferred output filename suffix.
Replace SHARD_TEMPLATE with the preferred output shard template.
Replace NUM_SHARDS with the number of output shards.
Replace WINDOW_DURATION with the output window duration.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/Cloud_PubSub_to_Avro
{
   "jobName": "JOB_NAME",
   "parameters": {
       "inputTopic": "projects/YOUR_PROJECT_ID/topics/YOUR_TOPIC_NAME",
       "outputDirectory": "gs://YOUR_BUCKET_NAME/output/",
       "avroTempDirectory": "gs://YOUR_BUCKET_NAME/temp/",
       "outputFilenamePrefix": "FILENAME_PREFIX",
       "outputFilenameSuffix": "FILENAME_SUFFIX",
       "outputShardTemplate": "SHARD_TEMPLATE",
       "numShards": "NUM_SHARDS",
       "windowDuration": "WINDOW_DURATION"
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */


package com.google.cloud.teleport.templates;

import com.google.cloud.teleport.avro.AvroPubsubMessageRecord;
import com.google.cloud.teleport.io.WindowedFilenamePolicy;
import com.google.cloud.teleport.util.DurationUtils;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.PipelineResult;
import org.apache.beam.sdk.io.AvroIO;
import org.apache.beam.sdk.io.FileBasedSink;
import org.apache.beam.sdk.io.fs.ResourceId;
import org.apache.beam.sdk.io.gcp.pubsub.PubsubIO;
import org.apache.beam.sdk.io.gcp.pubsub.PubsubMessage;
import org.apache.beam.sdk.options.Default;
import org.apache.beam.sdk.options.Description;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.options.StreamingOptions;
import org.apache.beam.sdk.options.Validation.Required;
import org.apache.beam.sdk.options.ValueProvider;
import org.apache.beam.sdk.options.ValueProvider.NestedValueProvider;
import org.apache.beam.sdk.transforms.DoFn;
import org.apache.beam.sdk.transforms.ParDo;
import org.apache.beam.sdk.transforms.SerializableFunction;
import org.apache.beam.sdk.transforms.windowing.FixedWindows;
import org.apache.beam.sdk.transforms.windowing.Window;

/**
 * This pipeline ingests incoming data from a Cloud Pub/Sub topic and outputs the raw data into
 * windowed Avro files at the specified output directory.
 *
 * <p>Files output will have the following schema:
 *
 * <pre>
 *   {
 *      "type": "record",
 *      "name": "AvroPubsubMessageRecord",
 *      "namespace": "com.google.cloud.teleport.avro",
 *      "fields": [
 *        {"name": "message", "type": {"type": "array", "items": "bytes"}},
 *        {"name": "attributes", "type": {"type": "map", "values": "string"}},
 *        {"name": "timestamp", "type": "long"}
 *      ]
 *   }
 * </pre>
 *
 * <p>Example Usage:
 *
 * <pre>
 * mvn compile exec:java \
 *   -Dexec.mainClass=com.google.cloud.teleport.templates.${PIPELINE_NAME} \
 *   -Dexec.cleanupDaemonThreads=false \
 *   -Dexec.args=" \
 *   --project=${PROJECT_ID} \
 *   --stagingLocation=gs://${PROJECT_ID}/dataflow/pipelines/${PIPELINE_FOLDER}/staging \
 *   --tempLocation=gs://${PROJECT_ID}/dataflow/pipelines/${PIPELINE_FOLDER}/temp \
 *   --runner=DataflowRunner \
 *   --windowDuration=2m \
 *   --numShards=1 \
 *   --topic=projects/${PROJECT_ID}/topics/windowed-files \
 *   --outputDirectory=gs://${PROJECT_ID}/temp/ \
 *   --outputFilenamePrefix=windowed-file \
 *   --outputFilenameSuffix=.avro
 *   --avroTempDirectory=gs://${PROJECT_ID}/avro-temp-dir/"
 * </pre>
 */
public class PubsubToAvro {

  /**
   * Options supported by the pipeline.
   *
   * <p>Inherits standard configuration options.
   */
  public interface Options extends PipelineOptions, StreamingOptions {
    @Description("The Cloud Pub/Sub topic to read from.")
    @Required
    ValueProvider<String> getInputTopic();

    void setInputTopic(ValueProvider<String> value);

    @Description("The directory to output files to. Must end with a slash.")
    @Required
    ValueProvider<String> getOutputDirectory();

    void setOutputDirectory(ValueProvider<String> value);

    @Description("The filename prefix of the files to write to.")
    @Default.String("output")
    ValueProvider<String> getOutputFilenamePrefix();

    void setOutputFilenamePrefix(ValueProvider<String> value);

    @Description("The suffix of the files to write.")
    @Default.String("")
    ValueProvider<String> getOutputFilenameSuffix();

    void setOutputFilenameSuffix(ValueProvider<String> value);

    @Description(
        "The shard template of the output file. Specified as repeating sequences "
            + "of the letters 'S' or 'N' (example: SSS-NNN). These are replaced with the "
            + "shard number, or number of shards respectively")
    @Default.String("W-P-SS-of-NN")
    ValueProvider<String> getOutputShardTemplate();

    void setOutputShardTemplate(ValueProvider<String> value);

    @Description("The maximum number of output shards produced when writing.")
    @Default.Integer(1)
    Integer getNumShards();

    void setNumShards(Integer value);

    @Description(
        "The window duration in which data will be written. Defaults to 5m. "
            + "Allowed formats are: "
            + "Ns (for seconds, example: 5s), "
            + "Nm (for minutes, example: 12m), "
            + "Nh (for hours, example: 2h).")
    @Default.String("5m")
    String getWindowDuration();

    void setWindowDuration(String value);

    @Description("The Avro Write Temporary Directory. Must end with /")
    @Required
    ValueProvider<String> getAvroTempDirectory();

    void setAvroTempDirectory(ValueProvider<String> value);

  }

  /**
   * Main entry point for executing the pipeline.
   *
   * @param args The command-line arguments to the pipeline.
   */
  public static void main(String[] args) {

    Options options = PipelineOptionsFactory.fromArgs(args).withValidation().as(Options.class);
    options.setStreaming(true);

    run(options);
  }

  /**
   * Runs the pipeline with the supplied options.
   *
   * @param options The execution parameters to the pipeline.
   * @return The result of the pipeline execution.
   */
  public static PipelineResult run(Options options) {
    // Create the pipeline
    Pipeline pipeline = Pipeline.create(options);

    /*
     * Steps:
     *   1) Read messages from PubSub
     *   2) Window the messages into minute intervals specified by the executor.
     *   3) Output the windowed data into Avro files, one per window by default.
     */
    pipeline
        .apply(
            "Read PubSub Events",
            PubsubIO.readMessagesWithAttributes().fromTopic(options.getInputTopic()))
        .apply("Map to Archive", ParDo.of(new PubsubMessageToArchiveDoFn()))
        .apply(
            options.getWindowDuration() + " Window",
            Window.into(FixedWindows.of(DurationUtils.parseDuration(options.getWindowDuration()))))

        // Apply windowed file writes. Use a NestedValueProvider because the filename
        // policy requires a resourceId generated from the input value at runtime.
        .apply(
            "Write File(s)",
            AvroIO.write(AvroPubsubMessageRecord.class)
                .to(
                    new WindowedFilenamePolicy(
                        options.getOutputDirectory(),
                        options.getOutputFilenamePrefix(),
                        options.getOutputShardTemplate(),
                        options.getOutputFilenameSuffix()))
                .withTempDirectory(NestedValueProvider.of(
                    options.getAvroTempDirectory(),
                    (SerializableFunction<String, ResourceId>) input ->
                        FileBasedSink.convertToFileResourceIfPossible(input)))
                /*.withTempDirectory(FileSystems.matchNewResource(
                    options.getAvroTempDirectory(),
                    Boolean.TRUE))
                    */
                .withWindowedWrites()
                .withNumShards(options.getNumShards()));

    // Execute the pipeline and return the result.
    return pipeline.run();
  }

  /**
   * Converts an incoming {@link PubsubMessage} to the {@link AvroPubsubMessageRecord} class by
   * copying it's fields and the timestamp of the message.
   */
  static class PubsubMessageToArchiveDoFn extends DoFn<PubsubMessage, AvroPubsubMessageRecord> {
    @ProcessElement
    public void processElement(ProcessContext context) {
      PubsubMessage message = context.element();
      context.output(
          new AvroPubsubMessageRecord(
              message.getPayload(), message.getAttributeMap(), context.timestamp().getMillis()));
    }
  }
}

Python

Python source code is not available.

Cloud Datastore to Cloud Storage Text

The Cloud Datastore to Cloud Storage Text template is a batch pipeline that reads Cloud Datastore entities and writes them to Cloud Storage as text files. You can provide a function to process each entity as a JSON string. If you don't provide such a function, every line in the output file will be a JSON-serialized entity.

Requirements for this pipeline:

Cloud Datastore must be set up in the project prior to execution.

Template parameters

Parameter	Description
`datastoreReadGqlQuery`	A GQL query that specifies which entities to grab. For example, `SELECT * FROM MyKind`.
`datastoreReadProjectId`	The GCP project ID of the Cloud Datastore instance that you want to read data from.
`datastoreReadNamespace`	The namespace of the requested entities. To use the default namespace, leave this parameter blank.
`javascriptTextTransformGcsPath`	A Cloud Storage path that contains all your Javascript code. For example, `gs://mybucket/mytransforms/*.js`. If you don't want to provide a function, leave this parameter blank.
`javascriptTextTransformFunctionName`	Name of the Javascript function to be called. For example, if your Javascript function is `function myTransform(inJson) { ...dostuff...}` then the function name is `myTransform`. If you don't want to provide a function, leave this parameter blank.
`textWritePrefix`	The Cloud Storage path prefix to specify where the data should be written. For example, `gs://mybucket/somefolder/`.

Executing the Cloud Datastore to Cloud Storage Text template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Datastore to Cloud Storage Text template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Datastore_to_GCS_Text

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.
Replace YOUR_DATASTORE_KIND with your the type of your Datastore entities.
Replace YOUR_DATASTORE_NAMESPACE with the namespace of your Datastore entities.
Replace YOUR_JAVASCRIPT_FUNCTION with your Javascript function name.
Replace PATH_TO_JAVASCRIPT_UDF_FILE with the Cloud Storage path to the .js file containing your Javascript code.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/Datastore_to_GCS_Text \
    --parameters \
datastoreReadGqlQuery="SELECT * FROM YOUR_DATASTORE_KIND",\
datastoreReadProjectId=YOUR_PROJECT_ID,\
datastoreReadNamespace=YOUR_DATASTORE_NAMESPACE,\
javascriptTextTransformGcsPath=PATH_TO_JAVASCRIPT_UDF_FILE,\
javascriptTextTransformFunctionName=YOUR_JAVASCRIPT_FUNCTION,\
textWritePrefix=gs://YOUR_BUCKET_NAME/output/

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Datastore_to_GCS_Text

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.
Replace YOUR_DATASTORE_KIND with your the type of your Datastore entities.
Replace YOUR_DATASTORE_NAMESPACE with the namespace of your Datastore entities.
Replace YOUR_JAVASCRIPT_FUNCTION with your Javascript function name.
Replace PATH_TO_JAVASCRIPT_UDF_FILE with the Cloud Storage path to the .js file containing your Javascript code.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/Datastore_to_GCS_Text
{
   "jobName": "JOB_NAME",
   "parameters": {
       "datastoreReadGqlQuery": "SELECT * FROM YOUR_DATASTORE_KIND"
       "datastoreReadProjectId": "YOUR_PROJECT_ID",
       "datastoreReadNamespace": "YOUR_DATASTORE_NAMESPACE",
       "javascriptTextTransformGcsPath": "PATH_TO_JAVASCRIPT_UDF_FILE",
       "javascriptTextTransformFunctionName": "YOUR_JAVASCRIPT_FUNCTION",
       "textWritePrefix": "gs://YOUR_BUCKET_NAME/output/"
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.cloud.teleport.templates;

import com.google.cloud.teleport.templates.common.DatastoreConverters.DatastoreReadOptions;
import com.google.cloud.teleport.templates.common.DatastoreConverters.ReadJsonEntities;
import com.google.cloud.teleport.templates.common.JavascriptTextTransformer.JavascriptTextTransformerOptions;
import com.google.cloud.teleport.templates.common.JavascriptTextTransformer.TransformTextViaJavascript;
import com.google.cloud.teleport.templates.common.TextConverters.FilesystemWriteOptions;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.io.TextIO;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;

/**
 * Dataflow template which copies Datastore Entities to a Text sink.
 * Text is encoded using JSON encoded entity in the v1/Entity rest format:
 * https://cloud.google.com/datastore/docs/reference/rest/v1/Entity
 */
public class DatastoreToText {

  interface DatastoreToTextOptions extends
      PipelineOptions,
      DatastoreReadOptions,
      JavascriptTextTransformerOptions,
      FilesystemWriteOptions {}

  /**
   * Runs a pipeline which reads in Entities from Datastore, passes in the JSON encoded Entities
   * to a Javascript UDF, and writes the JSON to TextIO sink.
   *
   * @param args arguments to the pipeline
   */
  public static void main(String[] args) {
    DatastoreToTextOptions options = PipelineOptionsFactory.fromArgs(args)
        .withValidation()
        .as(DatastoreToTextOptions.class);

    Pipeline pipeline = Pipeline.create(options);

    pipeline
        .apply(ReadJsonEntities.newBuilder()
            .setGqlQuery(options.getDatastoreReadGqlQuery())
            .setProjectId(options.getDatastoreReadProjectId())
            .setNamespace(options.getDatastoreReadNamespace())
            .build())
        .apply(TransformTextViaJavascript.newBuilder()
            .setFileSystemPath(options.getJavascriptTextTransformGcsPath())
            .setFunctionName(options.getJavascriptTextTransformFunctionName())
            .build())
        .apply(TextIO.write()
            .to(options.getTextWritePrefix())
            .withSuffix(".json"));

    pipeline.run();
  }
}

Python

Python source code is not available.

Cloud Storage Text to BigQuery

The Cloud Storage Text to BigQuery pipeline is a batch pipeline that allows you to read text files stored in Cloud Storage, transform them using a Javascript User Defined Function (UDF) that you provide, and output the result to BigQuery.

IMPORTANT: If you reuse an existing BigQuery table, the table will be overwritten.

Requirements for this pipeline:

Create a JSON file that describes your BigQuery schema.

Ensure that there is a top level JSON array titled “BigQuery Schema” and that its contents follow the pattern {“name”: ‘COLUMN NAME”, “type”:”DATA TYPE”}. For example:

{
  "BigQuery Schema": [
    {
      "name": "location",
      "type": "STRING"
    },
    {
      "name": "name",
      "type": "STRING"
    },
    {
      "name": "age",
      "type": "STRING"
    },
    {
      "name": "color",
      "type": "STRING"
    },
    {
      "name": "coffee",
      "type": "STRING"
    }
  ]
}

Create a Javascript (.js) file with your UDF function that supplies the logic to transform the lines of text. Note that your function must return a JSON string.
For example, this function splits each line of a CSV file and returns a JSON string after transforming the values.
```
function transform(line) {
var values = line.split(',');

var obj = new Object();
obj.location = values[0];
obj.name = values[1];
obj.age = values[2];
obj.color = values[3];
obj.coffee = values[4];
var jsonString = JSON.stringify(obj);

return jsonString;
}
```

Template parameters

Parameter	Description
`javascriptTextTransformFunctionName`	The name of the function you want to call from your `.js` file.
`JSONPath`	The `gs://` path to the JSON file that defines your BigQuery Schema, stored in Cloud Storage. For example, `gs://path/to/my/schema.json`.
`javascriptTextTransformGcsPath`	The `gs://` path to the Javascript file that defines your UDF. For example, `gs://path/to/my/javascript_function.js`.
`inputFilePattern`	The `gs://` path to the text in Cloud Storage you’d like to process. For example, `gs://path/to/my/text/data.txt`.
`outputTable`	The BigQuery table name you want to create to store your processed data in. If you reuse an existing BigQuery table, the table will be overwritten. For example, `my-project-name:my-dataset.my-table`.
`bigQueryLoadingTemporaryDirectory`	Temporary directory for BigQuery loading process. For example, `gs://my-bucket/my-files/temp_dir`.

Executing the Cloud Storage Text to BigQuery template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Storage Text to BigQuery template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/GCS_Text_to_BigQuery

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_JAVASCRIPT_FUNCTION with the name of your UDF.
Replace PATH_TO_BIGQUERY_SCHEMA_JSON with the Cloud Storage path to the JSON file containing the schema definition.
Replace PATH_TO_JAVASCRIPT_UDF_FILE with the Cloud Storage path to the .js file containing your Javascript code.
Replace PATH_TO_YOUR_TEXT_DATA with your Cloud Storage path to your text dataset.
Replace BIGQUERY_TABLE with your BigQuery table name.
Replace PATH_TO_TEMP_DIR_ON_GCS with your Cloud Storage path to the temp directory.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/GCS_Text_to_BigQuery \
    --parameters \
javascriptTextTransformFunctionName=YOUR_JAVASCRIPT_FUNCTION,\
JSONPath=PATH_TO_BIGQUERY_SCHEMA_JSON,\
javascriptTextTransformGcsPath=PATH_TO_JAVASCRIPT_UDF_FILE,\
inputFilePattern=PATH_TO_YOUR_TEXT_DATA,\
outputTable=BIGQUERY_TABLE,\
bigQueryLoadingTemporaryDirectory=PATH_TO_TEMP_DIR_ON_GCS

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/GCS_Text_to_BigQuery

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_JAVASCRIPT_FUNCTION with the name of your UDF.
Replace PATH_TO_BIGQUERY_SCHEMA_JSON with the Cloud Storage path to the JSON file containing the schema definition.
Replace PATH_TO_JAVASCRIPT_UDF_FILE with the Cloud Storage path to the .js file containing your Javascript code.
Replace PATH_TO_YOUR_TEXT_DATA with your Cloud Storage path to your text dataset.
Replace BIGQUERY_TABLE with your BigQuery table name.
Replace PATH_TO_TEMP_DIR_ON_GCS with your Cloud Storage path to the temp directory.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/GCS_Text_to_BigQuery
{
   "jobName": "JOB_NAME",
   "parameters": {
       "javascriptTextTransformFunctionName": "YOUR_JAVASCRIPT_FUNCTION",
       "JSONPath": "PATH_TO_BIGQUERY_SCHEMA_JSON",
       "javascriptTextTransformGcsPath": "PATH_TO_JAVASCRIPT_UDF_FILE",
       "inputFilePattern":"PATH_TO_YOUR_TEXT_DATA",
       "outputTable":"BIGQUERY_TABLE",
       "bigQueryLoadingTemporaryDirectory": "PATH_TO_TEMP_DIR_ON_GCS"
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */


package com.google.cloud.teleport.templates;

import com.google.api.services.bigquery.model.TableFieldSchema;
import com.google.api.services.bigquery.model.TableSchema;
import com.google.cloud.teleport.templates.common.BigQueryConverters;
import com.google.cloud.teleport.templates.common.JavascriptTextTransformer.JavascriptTextTransformerOptions;
import com.google.cloud.teleport.templates.common.JavascriptTextTransformer.TransformTextViaJavascript;
import java.util.ArrayList;
import java.util.List;
import org.apache.beam.runners.dataflow.options.DataflowPipelineOptions;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.io.TextIO;
import org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO;
import org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO.Write.CreateDisposition;
import org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO.Write.WriteDisposition;
import org.apache.beam.sdk.options.Description;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.options.Validation;
import org.apache.beam.sdk.options.ValueProvider;
import org.apache.beam.sdk.options.ValueProvider.NestedValueProvider;
import org.apache.beam.sdk.transforms.SerializableFunction;
import org.json.JSONArray;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Templated pipeline to read text from TextIO, apply a javascript UDF to it, and write it to GCS.
 */
public class TextIOToBigQuery {

  /** Options supported by {@link TextIOToBigQuery}. */
  public interface Options extends DataflowPipelineOptions, JavascriptTextTransformerOptions {
    @Description("The GCS location of the text you'd like to process")
    ValueProvider<String> getInputFilePattern();

    void setInputFilePattern(ValueProvider<String> value);

    @Description("JSON file with BigQuery Schema description")
    ValueProvider<String> getJSONPath();

    void setJSONPath(ValueProvider<String> value);

    @Description("Output topic to write to")
    ValueProvider<String> getOutputTable();

    void setOutputTable(ValueProvider<String> value);

    @Description("GCS path to javascript fn for transforming output")
    ValueProvider<String> getJavascriptTextTransformGcsPath();

    void setJavascriptTextTransformGcsPath(ValueProvider<String> jsTransformPath);

    @Validation.Required
    @Description("UDF Javascript Function Name")
    ValueProvider<String> getJavascriptTextTransformFunctionName();

    void setJavascriptTextTransformFunctionName(
        ValueProvider<String> javascriptTextTransformFunctionName);

    @Validation.Required
    @Description("Temporary directory for BigQuery loading process")
    ValueProvider<String> getBigQueryLoadingTemporaryDirectory();

    void setBigQueryLoadingTemporaryDirectory(ValueProvider<String> directory);
  }

  private static final Logger LOG = LoggerFactory.getLogger(TextIOToBigQuery.class);

  private static final String BIGQUERY_SCHEMA = "BigQuery Schema";
  private static final String NAME = "name";
  private static final String TYPE = "type";
  private static final String MODE = "mode";

  public static void main(String[] args) {
    Options options = PipelineOptionsFactory.fromArgs(args).withValidation().as(Options.class);
    Pipeline pipeline = Pipeline.create(options);

    pipeline
        .apply("Read from source", TextIO.read().from(options.getInputFilePattern()))
        .apply(
            TransformTextViaJavascript.newBuilder()
                .setFileSystemPath(options.getJavascriptTextTransformGcsPath())
                .setFunctionName(options.getJavascriptTextTransformFunctionName())
                .build())
        .apply(BigQueryConverters.jsonToTableRow())
        .apply(
            "Insert into Bigquery",
            BigQueryIO.writeTableRows()
                .withSchema(
                    NestedValueProvider.of(
                        options.getJSONPath(),
                        new SerializableFunction<String, TableSchema>() {

                          @Override
                          public TableSchema apply(String jsonPath) {

                            TableSchema tableSchema = new TableSchema();
                            List<TableFieldSchema> fields = new ArrayList<>();
                            SchemaParser schemaParser = new SchemaParser();
                            JSONObject jsonSchema;

                            try {

                              jsonSchema = schemaParser.parseSchema(jsonPath);

                              JSONArray bqSchemaJsonArray =
                                  jsonSchema.getJSONArray(BIGQUERY_SCHEMA);

                              for (int i = 0; i < bqSchemaJsonArray.length(); i++) {
                                JSONObject inputField = bqSchemaJsonArray.getJSONObject(i);
                                TableFieldSchema field =
                                    new TableFieldSchema()
                                        .setName(inputField.getString(NAME))
                                        .setType(inputField.getString(TYPE));

                                if (inputField.has(MODE)) {
                                  field.setMode(inputField.getString(MODE));
                                }

                                fields.add(field);
                              }
                              tableSchema.setFields(fields);

                            } catch (Exception e) {
                              throw new RuntimeException(e);
                            }
                            return tableSchema;
                          }
                        }))
                .to(options.getOutputTable())
                .withCreateDisposition(CreateDisposition.CREATE_IF_NEEDED)
                .withWriteDisposition(WriteDisposition.WRITE_TRUNCATE)
                .withCustomGcsTempLocation(options.getBigQueryLoadingTemporaryDirectory()));

    pipeline.run();
  }
}

Python

Python source code is not available.

Cloud Storage Text to Cloud Datastore

The Cloud Storage Text to Cloud Datastore template is a batch pipeline which reads from text files stored in Cloud Storage and writes JSON encoded Entities to Cloud Datastore. Each line in the input text files should be in JSON format specified in https://cloud.google.com/datastore/docs/reference/rest/v1/Entity .

Requirements for this pipeline:

Datastore must be enabled in the destination project.

Template parameters

Parameter	Description
`textReadPattern`	A Cloud Storage file path pattern that specifies the location of your text data files. For example, `gs://mybucket/somepath/*.json`.
`javascriptTextTransformGcsPath`	A Cloud Storage path pattern that contains all your Javascript code. For example, `gs://mybucket/mytransforms/*.js`. If you don't want to provide a function, leave this parameter blank.
`javascriptTextTransformFunctionName`	Name of the Javascript function to be called. For example, if your Javascript function is `function myTransform(inJson) { ...dostuff...}` then the function name is `myTransform`. If you don't want to provide a function, leave this parameter blank.
`datastoreWriteProjectId`	The GCP project id of where to write the Cloud Datastore entities
`errorWritePath`	The error log output file to use for write failures that occur during processing. For example, `gs://bucket-name/errors.txt`.

Executing the Cloud Storage Text to Datastore template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Storage Text to Datastore template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/GCS_Text_to_Datastore

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace PATH_TO_INPUT_TEXT_FILES with the input files pattern on Cloud Storage.
Replace YOUR_JAVASCRIPT_FUNCTION with your Javascript function name.
Replace PATH_TO_JAVASCRIPT_UDF_FILE with the Cloud Storage path to the .js file containing your Javascript code.
Replace ERROR_FILE_WRITE_PATH with your desired path to error file on Cloud Storage.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/GCS_Text_to_Datastore \
    --parameters \
textReadPattern=PATH_TO_INPUT_TEXT_FILES,\
javascriptTextTransformGcsPath=PATH_TO_JAVASCRIPT_UDF_FILE,\
javascriptTextTransformFunctionName=YOUR_JAVASCRIPT_FUNCTION,\
datastoreWriteProjectId=YOUR_PROJECT_ID,\
errorWritePath=ERROR_FILE_WRITE_PATH

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/GCS_Text_to_Datastore

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace PATH_TO_INPUT_TEXT_FILES with the input files pattern on Cloud Storage.
Replace YOUR_JAVASCRIPT_FUNCTION with your Javascript function name.
Replace PATH_TO_JAVASCRIPT_UDF_FILE with the Cloud Storage path to the .js file containing your Javascript code.
Replace ERROR_FILE_WRITE_PATH with your desired path to error file on Cloud Storage.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/GCS_Text_to_Datastore
{
   "jobName": "JOB_NAME",
   "parameters": {
       "textReadPattern": "PATH_TO_INPUT_TEXT_FILES",
       "javascriptTextTransformGcsPath": "PATH_TO_JAVASCRIPT_UDF_FILE",
       "javascriptTextTransformFunctionName": "YOUR_JAVASCRIPT_FUNCTION",
       "datastoreWriteProjectId": "YOUR_PROJECT_ID",
       "errorWritePath": "ERROR_FILE_WRITE_PATH"
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.cloud.teleport.templates;

import com.google.cloud.teleport.templates.common.DatastoreConverters.DatastoreWriteOptions;
import com.google.cloud.teleport.templates.common.DatastoreConverters.WriteJsonEntities;
import com.google.cloud.teleport.templates.common.ErrorConverters.ErrorWriteOptions;
import com.google.cloud.teleport.templates.common.ErrorConverters.LogErrors;
import com.google.cloud.teleport.templates.common.JavascriptTextTransformer.JavascriptTextTransformerOptions;
import com.google.cloud.teleport.templates.common.JavascriptTextTransformer.TransformTextViaJavascript;
import com.google.cloud.teleport.templates.common.TextConverters.FilesystemReadOptions;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.io.TextIO;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.values.TupleTag;

/**
 * Dataflow template which reads from a Text Source and writes JSON encoded Entities into Datastore.
 * The Json is expected to be in the format of:
 * https://cloud.google.com/datastore/docs/reference/rest/v1/Entity
 */
public class TextToDatastore {

  /**
   * TextToDatastore Pipeline Options.
   */
  public interface TextToDatastoreOptions extends
      PipelineOptions,
      FilesystemReadOptions,
      JavascriptTextTransformerOptions,
      DatastoreWriteOptions,
      ErrorWriteOptions {}

  /**
   * Runs a pipeline which reads from a Text Source, passes the Text to a Javascript UDF,
   * writes the JSON encoded Entities to a TextIO sink.
   *
   * <p>If your Text Source does not contain JSON encoded Entities, then you'll need to supply a
   * Javascript UDF which transforms your data to be JSON encoded Entities.
   *
   * @param args arguments to the pipeline
   */
  public static void main(String[] args) {
    TextToDatastoreOptions options = PipelineOptionsFactory.fromArgs(args)
        .withValidation()
        .as(TextToDatastoreOptions.class);

    TupleTag<String> errorTag = new TupleTag<String>("errors"){};

    Pipeline pipeline = Pipeline.create(options);

    pipeline
        .apply(TextIO.read()
            .from(options.getTextReadPattern()))
        .apply(TransformTextViaJavascript.newBuilder()
            .setFileSystemPath(options.getJavascriptTextTransformGcsPath())
            .setFunctionName(options.getJavascriptTextTransformFunctionName())
            .build())
        .apply(WriteJsonEntities.newBuilder()
            .setProjectId(options.getDatastoreWriteProjectId())
            .setErrorTag(errorTag)
            .build())
        .apply(LogErrors.newBuilder()
            .setErrorWritePath(options.getErrorWritePath())
            .setErrorTag(errorTag)
            .build());

    pipeline.run();
  }
}

Python

Python source code is not available.

Cloud Storage AvroFile to Cloud Bigtable

The Cloud Storage AvroFile to Cloud Bigtable template is a pipeline that reads data from AvroFile in a Cloud Storage bucket and writes them to a Cloud Bigtable table. You can use the template as a quick solution to move data from Cloud Storage to Cloud Bigtable.

Requirements for this pipeline:

The Cloud Bigtable table must exist and has the same column families as exported in the AvroFile.
The input AvroFile must exist in a Cloud Storage bucket prior to pipeline execution.

Template parameters

Parameter	Description
`bigtableProjectId`	The ID of the GCP project of the Cloud Bigtable instance that you want to write data to.
`bigtableInstanceId`	The ID of the Cloud Bigtable instance that contains the table.
`bigtableTableId`	The ID of the Cloud Bigtable table to import.
`inputFilePattern`	Cloud Storage path pattern where data is located. For example, `gs://mybucket/somefolder/prefix*`.

Executing the Cloud Storage AvroFile to Cloud Bigtable template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Storage AvroFile to Cloud Bigtable template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/GCS_AvroFile_to_Cloud_Bigtable

Replace [YOUR_PROJECT_ID] with your project ID.
Replace [JOB_NAME] with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace [PROJECT_ID] with the ID of the GCP project of the Cloud Bigtable instance that you want to read data from.
Replace [INSTANCE_ID] with the ID of the Cloud Bigtable instance that contains the table.
Replace [TABLE_ID] with the ID of the Cloud Bigtable table to export.
Replace [INPUT_FILE_PATTERN] with Cloud Storage path pattern where data is located. For example, gs://mybucket/somefolder/prefix*.

gcloud dataflow jobs run [JOB_NAME] \
    --gcs-location gs://dataflow-templates/latest/GCS_AvroFile_to_Cloud_Bigtable \
    --parameters bigtableProjectId=[PROJECT_ID],bigtableInstanceId=[INSTANCE_ID],bigtableTableId=[TABLE_ID],inputFilePattern=[INPUT_FILE_PATTERN]

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/GCS_AvroFile_to_Cloud_Bigtable

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

Replace [YOUR_PROJECT_ID] with your project ID.
Replace [JOB_NAME] with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace [PROJECT_ID] with the ID of the GCP project of the Cloud Bigtable instance that you want to read data from.
Replace [INSTANCE_ID] with the ID of the Cloud Bigtable instance that contains the table.
Replace [TABLE_ID] with the ID of the Cloud Bigtable table to export.
Replace [INPUT_FILE_PATTERN] with Cloud Storage path pattern where data is located. For example, gs://mybucket/somefolder/prefix*.

POST https://dataflow.googleapis.com/v1b3/projects/[YOUR_PROJECT_ID]/templates:launch?gcsPath=gs://dataflow-templates/latest/GCS_AvroFile_to_Cloud_Bigtable
{
   "jobName": "[JOB_NAME]",
   "parameters": {
       "bigtableProjectId": "[PROJECT_ID]",
       "bigtableInstanceId": "[INSTANCE_ID]",
       "bigtableTableId": "[TABLE_ID]",
       "inputFilePattern": "[INPUT_FILE_PATTERN]",
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java: SDK 2.x

This template's source code is in the GoogleCloudPlatform/DataflowTemplate repository on GitHub.

Python

Python source code is not available.

Cloud Storage SequenceFile to Cloud Bigtable

The Cloud Storage SequenceFile to Cloud Bigtable template is a pipeline that reads data from SequenceFile in a Cloud Storage bucket and writes them to a Cloud Bigtable table. You can use the template as a quick solution to move data from Cloud Storage to Cloud Bigtable.

Requirements for this pipeline:

The Cloud Bigtable table must exist.
The input SequenceFile must exist in a Cloud Storage bucket prior to pipeline execution.
The input SequenceFile must have been exported from Cloud Bigtable or HBase.

Template parameters

Parameter	Description
`bigtableProject`	The ID of the GCP project of the Cloud Bigtable instance that you want to write data to.
`bigtableInstanceId`	The ID of the Cloud Bigtable instance that contains the table.
`bigtableTableId`	The ID of the Cloud Bigtable table to import.
`bigtableAppProfileId`	The ID of the Cloud Bigtable application profile to be used for the import. If you do not specify an app profile, Cloud Bigtable uses the instance's default app profile.
`sourcePattern`	Cloud Storage path pattern where data is located. For example, `gs://mybucket/somefolder/prefix*`.

Executing the Cloud Storage SequenceFile to Cloud Bigtable template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Storage SequenceFile to Cloud Bigtable template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/GCS_SequenceFile_to_Cloud_Bigtable

Replace [YOUR_PROJECT_ID] with your project ID.
Replace [JOB_NAME] with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace [PROJECT_ID] with the ID of the GCP project of the Cloud Bigtable instance that you want to read data from.
Replace [INSTANCE_ID] with the ID of the Cloud Bigtable instance that contains the table.
Replace [TABLE_ID] with the ID of the Cloud Bigtable table to export.
Replace [APPLICATION_PROFILE_ID] with the ID of the Cloud Bigtable application profile to be used for the export.
Replace [SOURCE_PATTERN] with Cloud Storage path pattern where data is located. For example, gs://mybucket/somefolder/prefix*.

gcloud dataflow jobs run [JOB_NAME] \
    --gcs-location gs://dataflow-templates/latest/GCS_SequenceFile_to_Cloud_Bigtable \
    --parameters bigtableProject=[PROJECT_ID],bigtableInstanceId=[INSTANCE_ID],bigtableTableId=[TABLE_ID],bigtableAppProfileId=[APPLICATION_PROFILE_ID],sourcePattern=[SOURCE_PATTERN]

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/GCS_SequenceFile_to_Cloud_Bigtable

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

Replace [YOUR_PROJECT_ID] with your project ID.
Replace [JOB_NAME] with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace [PROJECT_ID] with the ID of the GCP project of the Cloud Bigtable instance that you want to read data from.
Replace [INSTANCE_ID] with the ID of the Cloud Bigtable instance that contains the table.
Replace [TABLE_ID] with the ID of the Cloud Bigtable table to export.
Replace [APPLICATION_PROFILE_ID] with the ID of the Cloud Bigtable application profile to be used for the export.
Replace [SOURCE_PATTERN] with Cloud Storage path pattern where data is located. For example, gs://mybucket/somefolder/prefix*.

POST https://dataflow.googleapis.com/v1b3/projects/[YOUR_PROJECT_ID]/templates:launch?gcsPath=gs://dataflow-templates/latest/GCS_SequenceFile_to_Cloud_Bigtable
{
   "jobName": "[JOB_NAME]",
   "parameters": {
       "bigtableProject": "[PROJECT_ID]",
       "bigtableInstanceId": "[INSTANCE_ID]",
       "bigtableTableId": "[TABLE_ID]",
       "bigtableAppProfileId": "[APPLICATION_PROFILE_ID]",
       "sourcePattern": "[SOURCE_PATTERN]",
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java: SDK 2.x

This template's source code is in the GoogleCloudPlatform/cloud-bigtable-client repository on GitHub.

Python

Python source code is not available.

Bulk Compress Cloud Storage Files

The Bulk Compress Cloud Storage Files template is a batch pipeline that compresses files on Cloud Storage to a specified location. This template can be useful when you need to compress large batches of files as part of a periodic archival process. The supported compression modes are: BZIP2, DEFLATE, GZIP, ZIP. Files output to the destination location will follow a naming schema of original filename appended with the compression mode extension. The extensions appended will be one of: .bzip2, .deflate, .gz, .zip.

Any errors which occur during the compression process will be output to the failure file in CSV format of filename, error message. If no failures occur during execution, the error file will still be created but will contain no error records.

Requirements for this pipeline:

The compression must be in one of the following formats: BZIP2, DEFLATE, GZIP, ZIP.
The output directory must exist prior to pipeline execution.

Template parameters

Parameter	Description
`inputFilePattern`	The input file pattern to read from. For example, `gs://bucket-name/uncompressed/*.txt`.
`outputDirectory`	The output location to write to. For example, `gs://bucket-name/compressed/`.
`outputFailureFile`	The error log output file to use for write failures that occur during the compression process. For example, `gs://bucket-name/compressed/failed.csv`. If there are no failures, the file is still created but will be empty. The file contents are in CSV format (Filename, Error) and consist of one line for each file that fails compression.
`compression`	The compression algorithm used to compress the matched files. Must be one of: `BZIP2`, `DEFLATE`, `GZIP`, `ZIP`

Executing the Bulk Compress Cloud Storage Files template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Bulk Compress Cloud Storage Files template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.
Replace COMPRESSION with your choice of compression algorithm.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/Bulk_Compress_GCS_Files \
    --parameters \
inputFilePattern=gs://YOUR_BUCKET_NAME/uncompressed/*.txt,\
outputDirectory=gs://YOUR_BUCKET_NAME/compressed,\
outputFailureFile=gs://YOUR_BUCKET_NAME/failed/failure.csv,\
compression=COMPRESSION

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Bulk_Compress_GCS_Files

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.
Replace COMPRESSION with your choice of compression algorithm.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/Bulk_Compress_GCS_Files
{
   "jobName": "JOB_NAME",
   "parameters": {
       "inputFilePattern": "gs://YOUR_BUCKET_NAME/uncompressed/*.txt",
       "outputDirectory": "gs://YOUR_BUCKET_NAME/compressed",
       "outputFailureFile": "gs://YOUR_BUCKET_NAME/failed/failure.csv",
       "compression": "COMPRESSION"
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.cloud.teleport.templates;

import com.google.common.collect.ImmutableList;
import com.google.common.io.ByteStreams;
import java.io.IOException;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.PipelineResult;
import org.apache.beam.sdk.io.Compression;
import org.apache.beam.sdk.io.FileIO;
import org.apache.beam.sdk.io.FileSystems;
import org.apache.beam.sdk.io.TextIO;
import org.apache.beam.sdk.io.fs.MatchResult;
import org.apache.beam.sdk.io.fs.ResolveOptions.StandardResolveOptions;
import org.apache.beam.sdk.io.fs.ResourceId;
import org.apache.beam.sdk.options.Description;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.options.Validation.Required;
import org.apache.beam.sdk.options.ValueProvider;
import org.apache.beam.sdk.transforms.DoFn;
import org.apache.beam.sdk.transforms.MapElements;
import org.apache.beam.sdk.transforms.ParDo;
import org.apache.beam.sdk.util.MimeTypes;
import org.apache.beam.sdk.values.KV;
import org.apache.beam.sdk.values.PCollectionTuple;
import org.apache.beam.sdk.values.TupleTag;
import org.apache.beam.sdk.values.TupleTagList;
import org.apache.beam.sdk.values.TypeDescriptors;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * The {@link BulkCompressor} is a batch pipeline that compresses files on matched by an input file
 * pattern and outputs them to a specified file location. This pipeline can be useful when you need
 * to compress large batches of files as part of a perodic archival process. The supported
 * compression modes are: <code>BZIP2</code>, <code>DEFLATE</code>, <code>GZIP</code>, <code>ZIP
 * </code>. Files output to the destination location will follow a naming schema of original
 * filename appended with the compression mode extension. The extensions appended will be one of:
 * <code>.bzip2</code>, <code>.deflate</code>, <code>.gz</code>, <code>.zip</code> as determined by
 * the compression type.
 *
 * <p>Any errors which occur during the compression process will be output to the failure file in
 * CSV format of filename, error message. If no failures occur during execution, the error file will
 * still be created but will contain no error records.
 *
 * <p><b>Pipeline Requirements</b>
 *
 * <ul>
 *   <li>The compression must be in one of the following formats: <code>BZIP2</code>, <code>DEFLATE
 *       </code>, <code>GZIP</code>, <code>ZIP</code>.
 *   <li>The output directory must exist prior to pipeline execution.
 * </ul>
 *
 * <p><b>Example Usage</b>
 *
 * <pre>
 * # Set the pipeline vars
 * PROJECT_ID=PROJECT ID HERE
 * PIPELINE_FOLDER=gs://${PROJECT_ID}/dataflow/pipelines/bulk-compressor
 *
 * # Set the runner
 * RUNNER=DataflowRunner
 *
 * # Build the template
 * mvn compile exec:java \
 * -Dexec.mainClass=com.google.cloud.teleport.templates.BulkCompressor \
 * -Dexec.cleanupDaemonThreads=false \
 * -Dexec.args=" \
 * --project=${PROJECT_ID} \
 * --stagingLocation=${PIPELINE_FOLDER}/staging \
 * --tempLocation=${PIPELINE_FOLDER}/temp \
 * --templateLocation=${PIPELINE_FOLDER}/template \
 * --runner=${RUNNER}"
 *
 * # Execute the template
 * JOB_NAME=bulk-compressor-$USER-`date +"%Y%m%d-%H%M%S%z"`
 *
 * gcloud dataflow jobs run ${JOB_NAME} \
 * --gcs-location=${PIPELINE_FOLDER}/template \
 * --zone=us-east1-d \
 * --parameters \
 * "inputFilePattern=${PIPELINE_FOLDER}/test/uncompressed/*,\
 * outputDirectory=${PIPELINE_FOLDER}/test/compressed,\
 * outputFailureFile=${PIPELINE_FOLDER}/test/failure/failed-${JOB_NAME}.csv,\
 * compression=GZIP"
 * </pre>
 */
public class BulkCompressor {

  /** The logger to output status messages to. */
  private static final Logger LOG = LoggerFactory.getLogger(BulkCompressor.class);

  /** The tag used to identify the main output of the {@link Compressor}. */
  private static final TupleTag<String> COMPRESOR_MAIN_OUT = new TupleTag<String>() {};

  /** The tag used to identify the dead-letter output of the {@link Compressor}. */
  private static final TupleTag<KV<String, String>> DEADLETTER_TAG =
      new TupleTag<KV<String, String>>() {};

  /**
   * The {@link Options} class provides the custom execution options passed by the executor at the
   * command-line.
   */
  public interface Options extends PipelineOptions {
    @Description("The input file pattern to read from (e.g. gs://bucket-name/uncompressed/*.gz)")
    @Required
    ValueProvider<String> getInputFilePattern();

    void setInputFilePattern(ValueProvider<String> value);

    @Description("The output location to write to (e.g. gs://bucket-name/compressed)")
    @Required
    ValueProvider<String> getOutputDirectory();

    void setOutputDirectory(ValueProvider<String> value);

    @Description(
        "The output file to write failures during the compression process "
            + "(e.g. gs://bucket-name/compressed/failed.txt). The contents will be one line for "
            + "each file which failed compression. Note that this parameter will "
            + "allow the pipeline to continue processing in the event of a failure.")
    @Required
    ValueProvider<String> getOutputFailureFile();

    void setOutputFailureFile(ValueProvider<String> value);

    @Description("The compression algorithm to use on the matched files.")
    @Required
    ValueProvider<Compression> getCompression();

    void setCompression(ValueProvider<Compression> value);
  }

  /**
   * The main entry-point for pipeline execution. This method will start the pipeline but will not
   * wait for it's execution to finish. If blocking execution is required, use the {@link
   * BulkCompressor#run(Options)} method to start the pipeline and invoke {@code
   * result.waitUntilFinish()} on the {@link PipelineResult}.
   *
   * @param args The command-line args passed by the executor.
   */
  public static void main(String[] args) {
    Options options = PipelineOptionsFactory.fromArgs(args).withValidation().as(Options.class);

    run(options);
  }

  /**
   * Runs the pipeline to completion with the specified options. This method does not wait until the
   * pipeline is finished before returning. Invoke {@code result.waitUntilFinish()} on the result
   * object to block until the pipeline is finished running if blocking programmatic execution is
   * required.
   *
   * @param options The execution options.
   * @return The pipeline result.
   */
  public static PipelineResult run(Options options) {

    // Create the pipeline
    Pipeline pipeline = Pipeline.create(options);

    /*
     * Steps:
     *   1) Find all files matching the input pattern
     *   2) Compress the files found and output them to the output directory
     *   3) Write any errors to the failure output file
     */
    PCollectionTuple compressOut =
        pipeline
            .apply("Match File(s)", FileIO.match().filepattern(options.getInputFilePattern()))
            .apply(
                "Compress File(s)",
                ParDo.of(new Compressor(options.getOutputDirectory(), options.getCompression()))
                    .withOutputTags(COMPRESOR_MAIN_OUT, TupleTagList.of(DEADLETTER_TAG)));

    compressOut
        .get(DEADLETTER_TAG)
        .apply(
            "Format Errors",
            MapElements.into(TypeDescriptors.strings())
                .via(kv -> String.format("%s,%s", kv.getKey(), kv.getValue())))
        .apply(
            "Write Error File",
            TextIO.write()
                .to(options.getOutputFailureFile())
                .withHeader("Filename,Error")
                .withoutSharding());

    return pipeline.run();
  }

  /**
   * The {@link Compressor} accepts {@link MatchResult.Metadata} from the FileSystems API and
   * compresses each file to an output location. Any compression failures which occur during
   * execution will be output to a separate output for further processing.
   */
  @SuppressWarnings("serial")
  public static class Compressor extends DoFn<MatchResult.Metadata, String> {

    private final ValueProvider<String> destinationLocation;
    private final ValueProvider<Compression> compressionValue;

    Compressor(ValueProvider<String> destinationLocation, ValueProvider<Compression> compression) {
      this.destinationLocation = destinationLocation;
      this.compressionValue = compression;
    }

    @ProcessElement
    public void processElement(ProcessContext context) {
      ResourceId inputFile = context.element().resourceId();
      Compression compression = compressionValue.get();

      // Add the compression extension to the output filename. Example: demo.txt -> demo.txt.gz
      String outputFilename = inputFile.getFilename() + compression.getSuggestedSuffix();

      // Resolve the necessary resources to perform the transfer
      ResourceId outputDir = FileSystems.matchNewResource(destinationLocation.get(), true);
      ResourceId outputFile =
          outputDir.resolve(outputFilename, StandardResolveOptions.RESOLVE_FILE);
      ResourceId tempFile =
          outputDir.resolve("temp-" + outputFilename, StandardResolveOptions.RESOLVE_FILE);

      // Perform the copy of the compressed channel to the destination.
      try (ReadableByteChannel readerChannel = FileSystems.open(inputFile)) {
        try (WritableByteChannel writerChannel =
            compression.writeCompressed(FileSystems.create(tempFile, MimeTypes.BINARY))) {

          // Execute the copy to the temporary file
          ByteStreams.copy(readerChannel, writerChannel);
        }

        // Rename the temporary file to the output file
        FileSystems.rename(ImmutableList.of(tempFile), ImmutableList.of(outputFile));

        // Output the path to the uncompressed file
        context.output(outputFile.toString());
      } catch (IOException e) {
        LOG.error("Error occurred during compression of {}", inputFile.toString(), e);
        context.output(DEADLETTER_TAG, KV.of(inputFile.toString(), e.getMessage()));
      }
    }
  }
}

Python

Python source code is not available.

Bulk Decompress Cloud Storage Files

The Bulk Decompress Cloud Storage Files template is a batch pipeline that decompresses files on Cloud Storage to a specified location. This functionality is useful when you want to use compressed data to minimize network bandwidth costs during a migration, but would like to maximize analytical processing speed by operating on uncompressed data after migration. The pipeline automatically handles multiple compression modes during a single execution and determines the decompression mode to use based on the file extension (.bzip2, .deflate, .gz, .zip).

Requirements for this pipeline:

The files to decompress must be in one of the following formats: Bzip2, Deflate, Gzip, Zip.
The output directory must exist prior to pipeline execution.

Template parameters

Parameter	Description
`inputFilePattern`	The input file pattern to read from. For example, `gs://bucket-name/compressed/*.gz`.
`outputDirectory`	The output location to write to. For example, `gs://bucket-name/decompressed`.
`outputFailureFile`	The error log output file to use for write failures that occur during the decompression process. For example, `gs://bucket-name/decompressed/failed.csv`. If there are no failures, the file is still created but will be empty. The file contents are in CSV format (Filename, Error) and consist of one line for each file that fails decompression.

Executing the Bulk Decompress Cloud Storage Files template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Bulk Decompress Cloud Storage Files template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Bulk_Decompress_GCS_Files

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.
Replace OUTPUT_FAILURE_FILE_PATH with your choice of path to the file containing failure information.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/Bulk_Decompress_GCS_Files \
    --parameters \
inputFilePattern=gs://YOUR_BUCKET_NAME/compressed/*.gz,\
outputDirectory=gs://YOUR_BUCKET_NAME/decompressed,\
outputFailureFile=OUTPUT_FAILURE_FILE_PATH

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Bulk_Decompress_GCS_Files

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.
Replace OUTPUT_FAILURE_FILE_PATH with your choice of path to the file containing failure information.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/Bulk_Decompress_GCS_Files
{
   "jobName": "JOB_NAME",
   "parameters": {
       "inputFilePattern": "gs://YOUR_BUCKET_NAME/compressed/*.gz",
       "outputDirectory": "gs://YOUR_BUCKET_NAME/decompressed",
       "outputFailureFile": "OUTPUT_FAILURE_FILE_PATH"
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.cloud.teleport.templates;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableList;
import com.google.common.io.ByteStreams;
import com.google.common.io.Files;
import java.io.IOException;
import java.io.StringWriter;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.PipelineResult;
import org.apache.beam.sdk.io.Compression;
import org.apache.beam.sdk.io.FileIO;
import org.apache.beam.sdk.io.FileSystems;
import org.apache.beam.sdk.io.TextIO;
import org.apache.beam.sdk.io.fs.MatchResult;
import org.apache.beam.sdk.io.fs.MoveOptions;
import org.apache.beam.sdk.io.fs.ResolveOptions.StandardResolveOptions;
import org.apache.beam.sdk.io.fs.ResourceId;
import org.apache.beam.sdk.options.Description;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.options.Validation.Required;
import org.apache.beam.sdk.options.ValueProvider;
import org.apache.beam.sdk.transforms.DoFn;
import org.apache.beam.sdk.transforms.MapElements;
import org.apache.beam.sdk.transforms.ParDo;
import org.apache.beam.sdk.util.MimeTypes;
import org.apache.beam.sdk.values.KV;
import org.apache.beam.sdk.values.PCollectionTuple;
import org.apache.beam.sdk.values.TupleTag;
import org.apache.beam.sdk.values.TupleTagList;
import org.apache.beam.sdk.values.TypeDescriptors;
import org.apache.commons.csv.CSVFormat;
import org.apache.commons.csv.CSVPrinter;
import org.apache.commons.csv.QuoteMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This pipeline decompresses file(s) from Google Cloud Storage and re-uploads them to a destination
 * location.
 *
 * <p><b>Parameters</b>
 *
 * <p>The {@code --inputFilePattern} parameter specifies a file glob to process. Files found can be
 * expressed in the following formats:
 *
 * <pre>
 * --inputFilePattern=gs://bucket-name/compressed-dir/*
 * --inputFilePattern=gs://bucket-name/compressed-dir/demo*.gz
 * </pre>
 *
 * <p>The {@code --outputDirectory} parameter can be expressed in the following formats:
 *
 * <pre>
 * --outputDirectory=gs://bucket-name
 * --outputDirectory=gs://bucket-name/decompressed-dir
 * </pre>
 *
 * <p>The {@code --outputFailureFile} parameter indicates the file to write the names of the files
 * which failed decompression and their associated error messages. This file can then be used for
 * subsequent processing by another process outside of Dataflow (e.g. send an email with the
 * failures, etc.). If there are no failures, the file will still be created but will be empty. The
 * failure file structure contains both the file that caused the error and the error message in CSV
 * format. The file will contain one header row and two columns (Filename, Error). The filename
 * output to the failureFile will be the full path of the file for ease of debugging.
 *
 * <pre>
 * --outputFailureFile=gs://bucket-name/decompressed-dir/failed.csv
 * </pre>
 *
 * <p>Example Output File:
 *
 * <pre>
 * Filename,Error
 * gs://docs-demo/compressedFile.gz, File is malformed or not compressed in BZIP2 format.
 * </pre>
 *
 * <p><b>Example Usage</b>
 *
 * <pre>
 * mvn compile exec:java \
 * -Dexec.mainClass=com.google.cloud.teleport.templates.BulkDecompressor \
 * -Dexec.cleanupDaemonThreads=false \
 * -Dexec.args=" \
 * --project=${PROJECT_ID} \
 * --stagingLocation=gs://${PROJECT_ID}/dataflow/pipelines/${PIPELINE_FOLDER}/staging \
 * --tempLocation=gs://${PROJECT_ID}/dataflow/pipelines/${PIPELINE_FOLDER}/temp \
 * --runner=DataflowRunner \
 * --inputFilePattern=gs://${PROJECT_ID}/compressed-dir/*.gz \
 * --outputDirectory=gs://${PROJECT_ID}/decompressed-dir \
 * --outputFailureFile=gs://${PROJECT_ID}/decompressed-dir/failed.csv"
 * </pre>
 */
public class BulkDecompressor {

  /** The logger to output status messages to. */
  private static final Logger LOG = LoggerFactory.getLogger(BulkDecompressor.class);

  /**
   * A list of the {@link Compression} values excluding {@link Compression#AUTO} and {@link
   * Compression#UNCOMPRESSED}.
   */
  @VisibleForTesting
  static final Set<Compression> SUPPORTED_COMPRESSIONS =
      Stream.of(Compression.values())
          .filter(value -> value != Compression.AUTO && value != Compression.UNCOMPRESSED)
          .collect(Collectors.toSet());

  /** The error msg given when the pipeline matches a file but cannot determine the compression. */
  @VisibleForTesting
  static final String UNCOMPRESSED_ERROR_MSG =
      "Skipping file %s because it did not match any compression mode (%s)";

  @VisibleForTesting
  static final String MALFORMED_ERROR_MSG =
      "The file resource %s is malformed or not in %s compressed format.";

  /** The tag used to identify the main output of the {@link Decompress} DoFn. */
  @VisibleForTesting
  static final TupleTag<String> DECOMPRESS_MAIN_OUT_TAG = new TupleTag<String>() {};

  /** The tag used to identify the dead-letter sideOutput of the {@link Decompress} DoFn. */
  @VisibleForTesting
  static final TupleTag<KV<String, String>> DEADLETTER_TAG = new TupleTag<KV<String, String>>() {};

  /**
   * The {@link Options} class provides the custom execution options passed by the executor at the
   * command-line.
   */
  public interface Options extends PipelineOptions {
    @Description("The input file pattern to read from (e.g. gs://bucket-name/compressed/*.gz)")
    @Required
    ValueProvider<String> getInputFilePattern();

    void setInputFilePattern(ValueProvider<String> value);

    @Description("The output location to write to (e.g. gs://bucket-name/decompressed)")
    @Required
    ValueProvider<String> getOutputDirectory();

    void setOutputDirectory(ValueProvider<String> value);

    @Description(
        "The output file to write failures during the decompression process "
            + "(e.g. gs://bucket-name/decompressed/failed.txt). The contents will be one line for "
            + "each file which failed decompression. Note that this parameter will "
            + "allow the pipeline to continue processing in the event of a failure.")
    @Required
    ValueProvider<String> getOutputFailureFile();

    void setOutputFailureFile(ValueProvider<String> value);
  }

  /**
   * The main entry-point for pipeline execution. This method will start the pipeline but will not
   * wait for it's execution to finish. If blocking execution is required, use the {@link
   * BulkDecompressor#run(Options)} method to start the pipeline and invoke {@code
   * result.waitUntilFinish()} on the {@link PipelineResult}.
   *
   * @param args The command-line args passed by the executor.
   */
  public static void main(String[] args) {

    Options options = PipelineOptionsFactory.fromArgs(args).withValidation().as(Options.class);

    run(options);
  }

  /**
   * Runs the pipeline to completion with the specified options. This method does not wait until the
   * pipeline is finished before returning. Invoke {@code result.waitUntilFinish()} on the result
   * object to block until the pipeline is finished running if blocking programmatic execution is
   * required.
   *
   * @param options The execution options.
   * @return The pipeline result.
   */
  public static PipelineResult run(Options options) {

    /*
     * Steps:
     *   1) Find all files matching the input pattern
     *   2) Decompress the files found and output them to the output directory
     *   3) Write any errors to the failure output file
     */

    // Create the pipeline
    Pipeline pipeline = Pipeline.create(options);

    // Run the pipeline over the work items.
    PCollectionTuple decompressOut =
        pipeline
            .apply("MatchFile(s)", FileIO.match().filepattern(options.getInputFilePattern()))
            .apply(
                "DecompressFile(s)",
                ParDo.of(new Decompress(options.getOutputDirectory()))
                    .withOutputTags(DECOMPRESS_MAIN_OUT_TAG, TupleTagList.of(DEADLETTER_TAG)));

    decompressOut
        .get(DEADLETTER_TAG)
        .apply(
            "FormatErrors",
            MapElements.into(TypeDescriptors.strings())
                .via(
                    kv -> {
                      StringWriter stringWriter = new StringWriter();
                      try {
                        CSVPrinter printer =
                            new CSVPrinter(
                                stringWriter,
                                CSVFormat.DEFAULT
                                    .withQuoteMode(QuoteMode.NONE)
                                    .withRecordSeparator('\n')
                                    .withEscape('\\'));
                        printer.printRecord(kv.getKey(), kv.getValue());
                      } catch (IOException e) {
                        throw new RuntimeException(e);
                      }

                      return stringWriter.toString();
                    }))

        // We don't expect error files to be large so we'll create a single
        // file for ease of reprocessing by processes outside of Dataflow.
        .apply(
            "WriteErrorFile",
            TextIO.write()
                .to(options.getOutputFailureFile())
                .withHeader("Filename,Error")
                .withoutSharding());

    return pipeline.run();
  }

  /**
   * Performs the decompression of an object on Google Cloud Storage and uploads the decompressed
   * object back to a specified destination location.
   */
  @SuppressWarnings("serial")
  public static class Decompress extends DoFn<MatchResult.Metadata, String> {

    private final ValueProvider<String> destinationLocation;

    Decompress(ValueProvider<String> destinationLocation) {
      this.destinationLocation = destinationLocation;
    }

    @ProcessElement
    public void processElement(ProcessContext context) {
      ResourceId inputFile = context.element().resourceId();

      // Output a record to the failure file if the file doesn't match a known compression.
      if (!Compression.AUTO.isCompressed(inputFile.toString())) {
        String errorMsg =
            String.format(UNCOMPRESSED_ERROR_MSG, inputFile.toString(), SUPPORTED_COMPRESSIONS);

        context.output(DEADLETTER_TAG, KV.of(inputFile.toString(), errorMsg));
      } else {
        try {
          ResourceId outputFile = decompress(inputFile);
          context.output(outputFile.toString());
        } catch (IOException e) {
          LOG.error(e.getMessage());
          context.output(DEADLETTER_TAG, KV.of(inputFile.toString(), e.getMessage()));
        }
      }
    }

    /**
     * Decompresses the inputFile using the specified compression and outputs to the main output of
     * the {@link Decompress} doFn. Files output to the destination will be first written as temp
     * files with a "temp-" prefix within the output directory. If a file fails decompression, the
     * filename and the associated error will be output to the dead-letter.
     *
     * @param inputFile The inputFile to decompress.
     * @return A {@link ResourceId} which points to the resulting file from the decompression.
     */
    private ResourceId decompress(ResourceId inputFile) throws IOException {
      // Remove the compressed extension from the file. Example: demo.txt.gz -> demo.txt
      String outputFilename = Files.getNameWithoutExtension(inputFile.toString());

      // Resolve the necessary resources to perform the transfer.
      ResourceId outputDir = FileSystems.matchNewResource(destinationLocation.get(), true);
      ResourceId outputFile =
          outputDir.resolve(outputFilename, StandardResolveOptions.RESOLVE_FILE);
      ResourceId tempFile =
          outputDir.resolve(Files.getFileExtension(inputFile.toString())
              + "-temp-" + outputFilename, StandardResolveOptions.RESOLVE_FILE);

      // Resolve the compression
      Compression compression = Compression.detect(inputFile.toString());

      // Perform the copy of the decompressed channel into the destination.
      try (ReadableByteChannel readerChannel =
          compression.readDecompressed(FileSystems.open(inputFile))) {
        try (WritableByteChannel writerChannel = FileSystems.create(tempFile, MimeTypes.TEXT)) {
          ByteStreams.copy(readerChannel, writerChannel);
        }

        // Rename the temp file to the output file.
        FileSystems.rename(
            ImmutableList.of(tempFile),
            ImmutableList.of(outputFile),
            MoveOptions.StandardMoveOptions.IGNORE_MISSING_FILES);
      } catch (IOException e) {
        String msg = e.getMessage();

        LOG.error("Error occurred during decompression of {}", inputFile.toString(), e);
        throw new IOException(sanitizeDecompressionErrorMsg(msg, inputFile, compression));
      }

      return outputFile;
    }

    /**
     * The error messages coming from the compression library are not consistent across compression
     * modes. Here we'll attempt to unify the messages to inform the user more clearly when we've
     * encountered a file which is not compressed or malformed. Note that GZIP and ZIP compression
     * modes will not throw an exception when a decompression is attempted on a file which is not
     * compressed.
     *
     * @param errorMsg The error message thrown during decompression.
     * @param inputFile The input file which failed decompression.
     * @param compression The compression mode used during decompression.
     * @return The sanitized error message. If the error was not from a malformed file, the same
     *     error message passed will be returned.
     */
    private String sanitizeDecompressionErrorMsg(
        String errorMsg, ResourceId inputFile, Compression compression) {
      if (errorMsg != null
          && (errorMsg.contains("not in the BZip2 format")
              || errorMsg.contains("incorrect header check"))) {
        errorMsg = String.format(MALFORMED_ERROR_MSG, inputFile.toString(), compression);
      }

      return errorMsg;
    }
  }
}

Python

Python source code is not available.

Cloud Datastore Bulk Delete

The Cloud Datastore Bulk Delete template is a pipeline which reads in Entities from Datastore with a given GQL query and then deletes all matching Entities in the selected target project. The pipeline can optionally pass the JSON encoded Datastore Entities to your Javascript UDF, which you can use to filter out Entities by returning null values.

Requirements for this pipeline:

Cloud Datastore must be set up in the project prior to execution.
If reading and deleting from separate Datastore instances, the Dataflow Controller Service Account must have permission to read from one instance and delete from the other.

Template parameters

Parameter	Description
`datastoreReadGqlQuery`	GQL Query which specifies which entities to match for deletion. e.g: "SELECT * FROM MyKind".
`datastoreReadProjectId`	GCP Project Id of the Cloud Datastore instance from which you want to read entities (using your GQL Query) that are used for matching.
`datastoreDeleteProjectId`	GCP Project Id of the Cloud Datastore instance from which to delete matching entities. This can be the same as `datastoreReadProjectId` if you want to read and delete within the same Cloud Datastore instance.
`datastoreReadNamespace`	[Optional] Namespace of requested Entities. Set as "" for default namespace.
`javascriptTextTransformGcsPath`	[Optional] A Cloud Storage path which contains all your Javascript code. e.g: "gs://mybucket/mytransforms/*.js". If you don't want to use a UDF leave this field blank.
`javascriptTextTransformFunctionName`	[Optional] Name of the Function to be called. If this function returns a value of undefined or null for a given Datastore Entity, then that Entity will not be deleted. If you have the javascript code of: "function myTransform(inJson) { ...dostuff...}" then your function name is "myTransform". If you don't want to use a UDF leave this field blank.

Executing the Bulk Decompress Cloud Storage Files template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Datastore Bulk Delete template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field. Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Bulk_Decompress_GCS_Files

You must replace the following values in this example:

Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace GQL_QUERY with the query you'll use to match entities for deletion.
Replace DATASTORE_READ_AND_DELETE_PROJECT_ID with your Datastore instance project id. This example will both read and delete from the same Datastore instance.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/Datastore_to_Datastore_Delete \
    --parameters \
datastoreReadGqlQuery="GQL_QUERY",\
datastoreReadProjectId=DATASTORE_READ_AND_DELETE_PROJECT_ID,\
datastoreDeleteProjectId=DATASTORE_READ_AND_DELETE_PROJECT_ID

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Bulk_Decompress_GCS_Files

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace GQL_QUERY with the query you'll use to match entities for deletion.
Replace DATASTORE_READ_AND_DELETE_PROJECT_ID with your Datastore instance project id. This example will both read and delete from the same Datastore instance.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/Datastore_to_Datastore_Delete
{
   "jobName": "JOB_NAME",
   "parameters": {
       "datastoreReadGqlQuery": "GQL_QUERY",
       "datastoreReadProjectId": "READ_PROJECT_ID",
       "datastoreDeleteProjectId": "DELETE_PROJECT_ID"
   },
   "environment": { "zone": "us-central1-f" }
   }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.cloud.teleport.templates;

import com.google.cloud.teleport.templates.common.DatastoreConverters.DatastoreDeleteEntityJson;
import com.google.cloud.teleport.templates.common.DatastoreConverters.DatastoreDeleteOptions;
import com.google.cloud.teleport.templates.common.DatastoreConverters.DatastoreReadOptions;
import com.google.cloud.teleport.templates.common.DatastoreConverters.ReadJsonEntities;
import com.google.cloud.teleport.templates.common.JavascriptTextTransformer.JavascriptTextTransformerOptions;
import com.google.cloud.teleport.templates.common.JavascriptTextTransformer.TransformTextViaJavascript;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;

/**
 * Dataflow template which deletes pulled Datastore Entities.
 */
public class DatastoreToDatastoreDelete {
  interface DatastoreToDatastoreDeleteOptions extends
      PipelineOptions,
      DatastoreReadOptions,
      JavascriptTextTransformerOptions,
      DatastoreDeleteOptions {}

  /**
   * Runs a pipeline which reads in Entities from datastore, passes in the JSON encoded Entities
   * to a Javascript UDF, and deletes all the Entities.
   *
   * <p>If the UDF returns value of undefined or null for a given Entity, then that Entity will not
   * be deleted.
   *
   * @param args arguments to the pipeline
   */
  public static void main(String[] args) {
    DatastoreToDatastoreDeleteOptions options = PipelineOptionsFactory.fromArgs(args)
        .withValidation()
        .as(DatastoreToDatastoreDeleteOptions.class);

    Pipeline pipeline = Pipeline.create(options);

    pipeline
        .apply(ReadJsonEntities.newBuilder()
            .setGqlQuery(options.getDatastoreReadGqlQuery())
            .setProjectId(options.getDatastoreReadProjectId())
            .setNamespace(options.getDatastoreReadNamespace())
            .build())
        .apply(TransformTextViaJavascript.newBuilder()
            .setFileSystemPath(options.getJavascriptTextTransformGcsPath())
            .setFunctionName(options.getJavascriptTextTransformFunctionName())
            .build())
        .apply(DatastoreDeleteEntityJson.newBuilder()
            .setProjectId(options.getDatastoreDeleteProjectId())
            .build());

    pipeline.run();
  }

}

Python

Python source code is not available.

Cloud Spanner to Cloud Storage Avro

The Cloud Spanner to Cloud Storage template is a batch pipeline that exports a whole Cloud Spanner database to Cloud Storage in Avro format. Exporting a Cloud Spanner database creates a folder in the bucket you select. The folder contains:

A spanner-export.json file.
A TableName-manifest.json file for each table in the database you exported.
One or more TableName.avro-#####-of-##### files.

For example, exporting a database with two tables, Singers and Albums, creates the following file set:

Albums-manifest.json
Albums.avro-00000-of-00002
Albums.avro-00001-of-00002
Singers-manifest.json
Singers.avro-00000-of-00003
Singers.avro-00001-of-00003
Singers.avro-00002-of-00003
spanner-export.json

Requirements for this pipeline:

The Cloud Spanner database must exist.
The output Cloud Storage bucket must exist.
In addition to the Cloud IAM roles necessary to run Cloud Dataflow jobs, you must also have the appropriate Cloud IAM roles for reading your Cloud Spanner data and writing to your Cloud Storage bucket.

Template parameters

Parameter	Description
`instanceId`	The instance ID of the Cloud Spanner database that you want to export.
`databaseId`	The database ID of the Cloud Spanner database that you want to export.
`outputDir`	The Cloud Storage path you want to export Avro files to. The export job creates a new directory under this path that contains the exported files.

Executing the template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Spanner to Cloud Storage Avro template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field.
- Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
- The job name must match the format cloud-spanner-export-[YOUR_INSTANCE_ID]-[YOUR_DATABASE_ID] to show up in the Cloud Spanner portion of the GCP Console.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Cloud_Spanner_to_GCS_Avro

Replace [DATAFLOW_REGION] with the region where you want the Cloud Dataflow job to run (such as us-central1).
Replace [YOUR_INSTANCE_ID] with your Cloud Spanner instance ID.
Replace [YOUR_DATABASE_ID] with your Cloud Spanner database ID.
Replace [YOUR_GCS_DIRECTORY] with the Cloud Storage path that the Avro files should be exported to.
Replace [JOB_NAME] with a job name of your choice.
- The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
- The job name must match the format cloud-spanner-export-[YOUR_INSTANCE_ID]-[YOUR_DATABASE_ID] to show up in the Cloud Spanner portion of the GCP Console.

gcloud dataflow jobs run [JOB_NAME] \
    --gcs-location='gs://dataflow-templates/[VERSION]/Cloud_Spanner_to_GCS_Avro' \
    --region=[DATAFLOW_REGION] \
    --parameters='instanceId=[YOUR_INSTANCE_ID],databaseId=[YOUR_DATABASE_ID],outputDir=[YOUR_GCS_DIRECTORY]

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Cloud_Spanner_to_GCS_Avro

Replace [YOUR_PROJECT_ID] with your project ID.
Replace [DATAFLOW_REGION] with the region where you want the Cloud Dataflow job to run (such as us-central1).
Replace [YOUR_INSTANCE_ID] with your Cloud Spanner instance ID.
Replace [YOUR_DATABASE_ID] with your Cloud Spanner database ID.
Replace [YOUR_GCS_DIRECTORY] with the Cloud Storage path that the Avro files should be exported to.
Replace [JOB_NAME] with a job name of your choice.
- The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
- The job name must match the format cloud-spanner-export-[YOUR_INSTANCE_ID]-[YOUR_DATABASE_ID] to show up in the Cloud Spanner portion of the GCP Console.

POST https://dataflow.googleapis.com/v1b3/projects/[YOUR_PROJECT_ID]/locations/[DATAFLOW_REGION]/templates:launch?gcsPath=gs://dataflow-templates/[VERSION]/Cloud_Spanner_to_GCS_Avro
{
   "jobName": "[JOB_NAME]",
   "parameters": {
       "instanceId": "[YOUR_INSTANCE_ID]",
       "databaseId": "[YOUR_DATABASE_ID]",
       "outputDir": "gs://[YOUR_GCS_DIRECTORY]"
   }
}

Template source code

Java: SDK 2.x

This template's source code is in the GoogleCloudPlatform/DataflowTemplates repository on GitHub.

Python

Python source code is not available.

Cloud Spanner to Cloud Storage Text

The Cloud Spanner to Cloud Storage Text template is a batch pipeline that reads in data from a Cloud Spanner table, optionally transforms the data via a JavaScript User Defined Function (UDF) that you provide and writes it to Cloud Storage as CSV text files.

Requirements for this pipeline:

The input Cloud Spanner table must exist prior to pipeline execution.

Template parameters

Parameter	Description
`spannerProjectId`	The GCP Project Id of the Cloud Spanner database that you want to read data from.
`spannerDatabaseId`	Database of requested table.
`spannerInstanceId`	Instance of requested table..
`spannerTable`	Table to export.
`textWritePrefix`	Output Directory where output text files will be written. Please add / at the end. For eg: `gs://mybucket/somefolder/`.
`javascriptTextTransformGcsPath`	[Optional] A Cloud Storage path that contains all your JavaScript code. For example, `gs://mybucket/mytransforms/*.js`. If you don't want to provide a function, leave this parameter blank.
`javascriptTextTransformFunctionName`	[Optional] Name of the JavaScript function to be called. For example, if your JavaScript function is `function myTransform(inJson) { ...dostuff...}` then the function name is `myTransform`. If you don't want to provide a function, leave this parameter blank.

Executing the Cloud Spanner to Cloud Storage Text template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Spanner to Cloud Storage Text template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field.
- Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
- The job name must match the format cloud-spanner-export-[YOUR_INSTANCE_ID]-[YOUR_DATABASE_ID] to show up in the Cloud Spanner portion of the GCP Console.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Spanner_to_GCS_Text

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_DATABASE_ID with the Cloud Spanner database id.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.
Replace YOUR_INSTANCE_ID with the Cloud Spanner instance id.
Replace YOUR_TABLE_ID with the Cloud Spanner table id.
Replace PATH_TO_JAVASCRIPT_UDF_FILE with the Cloud Storage path to the .js file containing your JavaScript code.
Replace YOUR_JAVASCRIPT_FUNCTION with your JavaScript function name.

gcloud dataflow jobs run JOB_NAME \
    --gcs-location gs://dataflow-templates/latest/Spanner_to_GCS_Text \
    --parameters \
spannerProjectId=YOUR_PROJECT_ID,\
spannerDatabaseId=YOUR_DATABASE_ID,\
spannerInstanceId=YOUR_INSTANCE_ID,\
spannerTable=YOUR_TABLE_ID,\
textWritePrefix=gs://YOUR_BUCKET_NAME/output/,\
javascriptTextTransformGcsPath=PATH_TO_JAVASCRIPT_UDF_FILE,\
javascriptTextTransformFunctionName=YOUR_JAVASCRIPT_FUNCTION

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/Spanner_to_GCS_Text

To execute this template with a REST API request, send an HTTP POST request with your project ID. This request requires authorization.

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_DATABASE_ID with the Cloud Spanner database id.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.
Replace YOUR_INSTANCE_ID with the Cloud Spanner instance id.
Replace YOUR_TABLE_ID with the Cloud Spanner table id.
Replace PATH_TO_JAVASCRIPT_UDF_FILE with the Cloud Storage path to the .js file containing your JavaScript code.
Replace YOUR_JAVASCRIPT_FUNCTION with your JavaScript function name.

POST https://dataflow.googleapis.com/v1b3/projects/YOUR_PROJECT_ID/templates:launch?gcsPath=gs://dataflow-templates/latest/Spanner_to_GCS_Text
{
   "jobName": "JOB_NAME",
   "parameters": {
       "spannerProjectId": "YOUR_PROJECT_ID",
       "spannerDatabaseId": "YOUR_DATABASE_ID",
       "spannerInstanceId": "YOUR_INSTANCE_ID",
       "spannerTable": "YOUR_TABLE_ID",
       "textWritePrefix": "gs://YOUR_BUCKET_NAME/output/",
       "javascriptTextTransformGcsPath": "PATH_TO_JAVASCRIPT_UDF_FILE",
       "javascriptTextTransformFunctionName": "YOUR_JAVASCRIPT_FUNCTION"
   },
   "environment": { "zone": "us-central1-f" }
}

Template source code

Java

View on GitHub Feedback

/*
 * Copyright (C) 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.cloud.teleport.templates;

import com.google.cloud.teleport.templates.common.JavascriptTextTransformer.JavascriptTextTransformerOptions;
import com.google.cloud.teleport.templates.common.JavascriptTextTransformer.TransformTextViaJavascript;
import com.google.cloud.teleport.templates.common.SpannerConverters;
import com.google.cloud.teleport.templates.common.SpannerConverters.SpannerReadOptions;
import com.google.cloud.teleport.templates.common.TextConverters.FilesystemWriteOptions;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.io.FileSystems;
import org.apache.beam.sdk.io.TextIO;
import org.apache.beam.sdk.io.gcp.spanner.ReadOperation;
import org.apache.beam.sdk.io.gcp.spanner.SpannerConfig;
import org.apache.beam.sdk.io.gcp.spanner.SpannerIO;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.transforms.MapElements;
import org.apache.beam.sdk.transforms.PTransform;
import org.apache.beam.sdk.values.PBegin;
import org.apache.beam.sdk.values.PCollection;
import org.apache.beam.sdk.values.TypeDescriptors;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Dataflow template which copies a Spanner table to a Text sink. It exports a Spanner table using
 * <a href="https://cloud.google.com/spanner/docs/reads#read_data_in_parallel">Batch API</a>,
 * which creates multiple workers in parallel for better performance. The result is written
 * to a CSV file in Google Cloud Storage. The table schema file is saved in json format along with
 * the exported table.
 *
 * <p>Schema file sample: { "id":"INT64", "name":"STRING(MAX)" }
 *
 * <p>A sample run:
 *
 * <pre>
 * mvn compile exec:java \
 *   -Dexec.mainClass=com.google.cloud.teleport.templates.SpannerToText \
 *   -Dexec.args="--runner=DataflowRunner \
 *                --spannerProjectId=projectId
 *                --gcpTempLocation=gs://gsTmpLocation \
 *                --spannerInstanceId=instanceId \
 *                --spannerDatabaseId=databaseId \
 *                --spannerTable=table_name \
 *                --textWritePrefix=gcsOutputPath"
 * </pre>
 */
public class SpannerToText {

  private static final Logger LOG = LoggerFactory.getLogger(SpannerToText.class);

  private interface SpannerToTextOptions
      extends PipelineOptions,
          SpannerReadOptions,
          JavascriptTextTransformerOptions,
          FilesystemWriteOptions {}

  /**
   * Runs a pipeline which reads in Records from Spanner, passes in the CSV records to a Javascript
   * UDF, and writes the CSV to TextIO sink.
   *
   * @param args arguments to the pipeline
   */
  public static void main(String[] args) {
    LOG.info("Starting pipeline setup");
    PipelineOptionsFactory.register(SpannerToTextOptions.class);
    SpannerToTextOptions options =
        PipelineOptionsFactory.fromArgs(args).withValidation().as(SpannerToTextOptions.class);

    FileSystems.setDefaultPipelineOptions(options);
    Pipeline pipeline = Pipeline.create(options);

    SpannerConfig spannerConfig =
        SpannerConfig.create()
            .withProjectId(options.getSpannerProjectId())
            .withInstanceId(options.getSpannerInstanceId())
            .withDatabaseId(options.getSpannerDatabaseId());

    PTransform<PBegin, PCollection<ReadOperation>> spannerExport =
        SpannerConverters.ExportTransformFactory.create(
            options.getSpannerTable(), spannerConfig, options.getTextWritePrefix());

    PCollection<String> csv =
        pipeline
            .apply("Create export", spannerExport)
            // We need to use SpannerIO.readAll() instead of SpannerIO.read()
            // because ValueProvider parameters such as table name required for SpannerIO.read()
            // can be read only inside DoFn but SpannerIO.read() is of type
            // PTransform<PBegin, Struct>, which prevents prepending it with DoFn that reads these
            // parameters at the pipeline execution time.
            .apply("Read all records", SpannerIO.readAll().withSpannerConfig(spannerConfig))
            .apply(
                "Struct To Csv",
                MapElements.into(TypeDescriptors.strings())
                    .via(struct -> (new SpannerConverters.StructCsvPrinter()).print(struct)));

    if (options.getJavascriptTextTransformGcsPath().isAccessible()) {
      // The UDF function takes a CSV row as an input and produces a transformed CSV row
      csv =
          csv.apply(
              "JavascriptUDF",
              TransformTextViaJavascript.newBuilder()
                  .setFileSystemPath(options.getJavascriptTextTransformGcsPath())
                  .setFunctionName(options.getJavascriptTextTransformFunctionName())
                  .build());
    }
    csv.apply(
        "Write to storage", TextIO.write().to(options.getTextWritePrefix()).withSuffix(".csv"));

    pipeline.run();
    LOG.info("Completed pipeline setup");
  }
}

Python

Python source code is not available.

Cloud Storage Avro to Cloud Spanner

The Cloud Storage Avro files to Cloud Spanner template is a batch pipeline that reads Avro files from Cloud Storage and imports them to a Cloud Spanner database.

Requirements for this pipeline:

The target Cloud Spanner database must exist and must be empty.
You need to have read permissions for the Cloud Storage bucket and write permissions for the target Cloud Spanner database.
The input Cloud Storage path must exist, and it must include a spanner-export.json file that contains a JSON description of files to import.
You must have exported the Avro and JSON files from a Cloud Spanner database.

Template parameters

Parameter	Description
`instanceId`	The instance ID of the Cloud Spanner database.
`databaseId`	The database ID of the Cloud Spanner database.
`inputDir`	The Cloud Storage path where the Avro files should be imported from.

Executing the template

CONSOLE

Execute from the Google Cloud Platform Console

Go to the Cloud Dataflow page in the GCP Console.

Go to the Cloud Dataflow page

Click CREATE JOB FROM TEMPLATE.

Select the Cloud Storage Avro to Cloud Spanner template from the Cloud Dataflow template drop-down menu.
Enter a job name in the Job Name field.
- Your job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
- The job name must match the format cloud-spanner-import-[YOUR_INSTANCE_ID]-[YOUR_DATABASE_ID] to show up in the Cloud Spanner portion of the GCP Console.
Enter your parameter values in the provided parameter fields.
Click Run Job.

GCLOUD

Execute from the gcloud command-line tool

Note: To use the gcloud command-line tool to execute templates, you must have Cloud SDK version 138.0.0 or higher.

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/GCS_Avro_to_Cloud_Spanner

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_DATABASE_ID with the Cloud Spanner database id.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.
Replace YOUR_INSTANCE_ID with the Cloud Spanner instance id.
Replace YOUR_TABLE_ID with the Cloud Spanner table id.
Replace PATH_TO_JAVASCRIPT_UDF_FILE with the Cloud Storage path to the .js file containing your JavaScript code.
Replace YOUR_JAVASCRIPT_FUNCTION with your JavaScript function name.

gcloud dataflow jobs run [JOB_NAME] \
    --gcs-location='gs://dataflow-templates/[VERSION]/GCS_Avro_to_Cloud_Spanner' \
    --region=[DATAFLOW_REGION] \
    --parameters='instanceId=[YOUR_INSTANCE_ID],databaseId=[YOUR_DATABASE_ID],inputDir=[YOUR_GCS_DIRECTORY]

API

Execute from the REST API

When executing this template, you'll need the Cloud Storage path to the template:

gs://dataflow-templates/VERSION/GCS_Avro_to_Cloud_Spanner

You must replace the following values in this example:

Replace YOUR_PROJECT_ID with your project ID.
Replace JOB_NAME with a job name of your choice. The job name must match the regular expression [a-z]([-a-z0-9]{0,38}[a-z0-9])? to be valid.
Replace YOUR_DATABASE_ID with the Cloud Spanner database id.
Replace YOUR_BUCKET_NAME with the name of your Cloud Storage bucket.
Replace YOUR_INSTANCE_ID with the Cloud Spanner instance id.
Replace YOUR_TABLE_ID with the Cloud Spanner table id.
Replace PATH_TO_JAVASCRIPT_UDF_FILE with the Cloud Storage path to the .js file containing your JavaScript code.
Replace YOUR_JAVASCRIPT_FUNCTION with your JavaScript function name.

POST https://dataflow.googleapis.com/v1b3/projects/[YOUR_PROJECT_ID]/locations/[DATAFLOW_REGION]/templates:launch?gcsPath=gs://dataflow-templates/[VERSION]/GCS_Avro_to_Cloud_Spanner
{
   "jobName": "[JOB_NAME]",
   "parameters": {
       "instanceId": "[YOUR_INSTANCE_ID]",
       "databaseId": "[YOUR_DATABASE_ID]",
       "inputDir": "gs://[YOUR_GCS_DIRECTORY]"
   },
   "environment": {
       "machineType": "n1-standard-2"
   }
}

Template source code

Java: SDK 2.x

This template's source code is in the GoogleCloudPlatform/DataflowTemplates repository on GitHub.

Python

Python source code is not available.