JMS to Pub/Sub template

Beta

This feature is subject to the "Pre-GA Offerings Terms" in the General Service Terms section of the Service Specific Terms. Pre-GA features are available "as is" and might have limited support. For more information, see the launch stage descriptions.

The JMS to Pub/Sub template is a streaming pipeline that reads messages from Active MQ JMS Server (Queue/Topic) and writes them to Pub/Sub.

Pipeline Requirements

• The Pub/Sub output topic name must exist.
• The JMS host IP must exist and have the proper network configuration for Dataflow worker VMs to reach the JMS host.
• The JMS topic/queue that data is extracted from must have a name.

Template parameters

Required parameters

• inputName : The name of the JMS topic or queue that data is read from. (Example: queue).
• inputType : The JMS destination type to read data from. Can be a queue or a topic. (Example: queue).
• outputTopic : The name of the Pub/Sub topic to publish data to, in the format projects/<PROJECT_ID>/topics/<TOPIC_NAME>. (Example: projects/your-project-id/topics/your-topic-name).
• username : The username to use for authentication on the JMS server. (Example: sampleusername).
• password : The password associated with the provided username. (Example: samplepassword).

Optional parameters

• jmsServer : The JMS (ActiveMQ) Server IP. (Example: tcp://10.0.0.1:61616).

Run the template

Console

1. Go to the Dataflow Create job from template page.
Go to Create job from template
2. In the Job name field, enter a unique job name.
3. Optional: For Regional endpoint, select a value from the drop-down menu. The default region is us-central1.

   For a list of regions where you can run a Dataflow job, see Dataflow locations.

4. From the Dataflow template drop-down menu, select JMS to Pub/Sub template.
5. In the provided parameter fields, enter your parameter values.
6. Click Run job.

gcloud

Note: To use the Google Cloud CLI to run flex templates, you must have Google Cloud CLI version 284.0.0 or later.

In your shell or terminal, run the template:

gcloud dataflow flex-template run JOB_NAME \
    --project=YOUR_PROJECT_ID \
    --region=REGION_NAME \
    --template-file-gcs-location=gs://dataflow-templates-REGION_NAME/VERSION/flex/JMS_to_Cloud_PubSub \
    --parameters \
jmsServer=JMS_SERVER,\
inputName=INPUT_NAME,\
inputType=INPUT_TYPE,\
outputTopic=OUTPUT_TOPIC,\
username=USERNAME,\
password=PASSWORD
  

You must replace the following values in this example:

• Replace YOUR_PROJECT_ID with your project ID.
• Replace with Dataflow region name. For example: us-central1.
• 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 JMS_SERVER with the JMS server addresses. For example: tcp://10.0.0.0:61616
• Replace INPUT_NAME with the name of the JMS server input topic/queue. For example: testtopic.
• Replace INPUT_TYPE with the JMS server Destination Type(queue/topic). For example: topic
• Replace OUTPUT_TOPIC with the name of Pub/Sub output topic. For example: projects/myproject/topics/testoutput.
• Replace USERNAME with the username for the JMS server. For example: testuser.
• Replace PASSWORD with the password that corresponds to the username used with the JMS server.

API

To run the template using the REST API, send an HTTP POST request. For more information on the API and its authorization scopes, see projects.templates.launch.

POST https://dataflow.googleapis.com/v1b3/projects/PROJECT_ID/locations/LOCATION/flexTemplates:launch
{
   "launch_parameter": {
      "jobName": "JOB_NAME",
      "parameters": {
          "jmsServer": "JMS_SERVER",
          "inputName": "INPUT_NAME",
          "inputType": "INPUT_TYPE",
          "outputTopic": "OUTPUT_TOPIC",
          "username": "USERNAME",
          "password": "PASSWORD"
      },
      "containerSpecGcsPath": "gs://dataflow-templates-REGION_NAME/VERSION/flex/JMS_to_Cloud_PubSub",
   }
}
  

You must replace the following values in this example:

• Replace YOUR_PROJECT_ID with your project ID.
• Replace with Dataflow region name. For example: us-central1.
• 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 JMS_SERVER with the JMS server addresses. For example: tcp://10.0.0.0:61616
• Replace INPUT_NAME with the name of the JMS server input topic/queue. For example: testtopic.
• Replace INPUT_TYPE with the JMS server Destination Type(queue/topic). For example: topic
• Replace OUTPUT_TOPIC with the name of Pub/Sub output topic. For example: projects/myproject/topics/testoutput.
• Replace USERNAME with the username for the JMS server. For example: testuser.
• Replace PASSWORD with the password that corresponds to the username used with the JMS server.

Template source code

Java

/*
 * Copyright (C) 2023 Google LLC
 *
 * 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.v2.templates;

import com.google.cloud.teleport.metadata.Template;
import com.google.cloud.teleport.metadata.TemplateCategory;
import com.google.cloud.teleport.metadata.TemplateParameter;
import javax.jms.ConnectionFactory;
import org.apache.activemq.ActiveMQConnectionFactory;
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.jms.JmsIO;
import org.apache.beam.sdk.io.jms.JmsRecord;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.options.Validation;
import org.apache.beam.sdk.transforms.MapElements;
import org.apache.beam.sdk.transforms.SimpleFunction;
import org.apache.beam.sdk.values.PCollection;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Dataflow template which reads data from Jms Queue/Topic and writes it to Cloud PubSub.
 *
 * <p>Check out <a
 * href="https://github.com/GoogleCloudPlatform/DataflowTemplates/blob/main/v2/jms-to-pubsub/README_Jms_to_PubSub.md">README</a>
 * for instructions on how to use or modify this template.
 */
@Template(
    name = "Jms_to_PubSub",
    category = TemplateCategory.STREAMING,
    displayName = "JMS to Pubsub",
    description =
        "The JMS to Pub/Sub template is a streaming pipeline that reads messages from ActiveMQ JMS Server (Queue/Topic) and writes them to Pub/Sub.",
    optionsClass = com.google.cloud.teleport.v2.templates.JmsToPubsub.JmsToPubsubOptions.class,
    flexContainerName = "jms-to-pubsub",
    contactInformation = "https://cloud.google.com/support",
    documentation =
        "https://cloud.google.com/dataflow/docs/guides/templates/provided/jms-to-pubsub",
    preview = true,
    requirements = {
      "The Pub/Sub output topic name must exist.",
      "The JMS host IP must exist and have the proper network configuration for Dataflow worker VMs to reach the JMS host.",
      "The JMS topic/queue that data is extracted from must have a name."
    },
    streaming = true,
    supportsAtLeastOnce = true)
public class JmsToPubsub {

  /**
   * Runs a pipeline which reads data from JMS queue/topic and writes it to Cloud PubSub.
   *
   * @param args arguments to the pipeline
   */
  private static final Logger LOG = LoggerFactory.getLogger(JmsToPubsub.class);

  public static void main(String[] args) {
    JmsToPubsubOptions options =
        PipelineOptionsFactory.fromArgs(args).withValidation().as(JmsToPubsubOptions.class);
    run(options);
  }

  public static void validate(JmsToPubsubOptions options) {
    if (options != null) {
      if ((options.getUsername() != null
              && (!options.getUsername().isEmpty() || !options.getUsername().isBlank()))
          && (options.getPassword() == null
              || options.getPassword().isBlank()
              || options.getPassword().isEmpty())) {
        throw new IllegalArgumentException(
            "While username is provided, password is required for authentication");
      }
    }
  }

  public static PipelineResult run(JmsToPubsubOptions options) {
    validate(options);
    Pipeline pipeline = Pipeline.create(options);
    String connectionURI = options.getJmsServer();
    ConnectionFactory myConnectionFactory;
    PCollection<JmsRecord> input;

    if (!options.getUsername().isEmpty() || !options.getUsername().isBlank()) {
      myConnectionFactory =
          new ActiveMQConnectionFactory(
              options.getUsername(), options.getPassword(), connectionURI);
    } else {
      myConnectionFactory = new ActiveMQConnectionFactory(connectionURI);
    }
    LOG.info("Given Input Type " + options.getInputType());
    if (options.getInputType().equalsIgnoreCase("queue")) {
      input =
          pipeline.apply(
              "Read From JMS Queue",
              JmsIO.read()
                  .withConnectionFactory(myConnectionFactory)
                  .withQueue(options.getInputName()));
    } else {
      input =
          pipeline.apply(
              "Read From JMS Topic",
              JmsIO.read()
                  .withConnectionFactory(myConnectionFactory)
                  .withTopic(options.getInputName()));
    }

    input
        .apply(
            MapElements.via(
                new SimpleFunction<JmsRecord, String>() {
                  public String apply(JmsRecord input) {
                    return input.getPayload();
                  }
                }))
        .apply("WriteToPubSubTopic", PubsubIO.writeStrings().to(options.getOutputTopic()));
    return pipeline.run();
  }

  /**
   * The {@link JmsToPubsubOptions} interface provides the custom execution options passed by the
   * executor at the command-line.
   */
  public interface JmsToPubsubOptions extends PipelineOptions {
    @TemplateParameter.Text(
        order = 1,
        groupName = "Source",
        optional = true,
        regexes = {"[,\\/:a-zA-Z0-9._-]+"},
        description = "JMS Host IP",
        helpText = "The JMS (ActiveMQ) Server IP.",
        example = "tcp://10.0.0.1:61616")
    @Validation.Required
    String getJmsServer();

    void setJmsServer(String jmsServer);

    @TemplateParameter.Text(
        order = 2,
        groupName = "Source",
        optional = false,
        regexes = {"[a-zA-Z0-9._-]+"},
        description = "JMS Queue/Topic Name to read the input from",
        helpText = "The name of the JMS topic or queue that data is read from.",
        example = "queue")
    @Validation.Required
    String getInputName();

    void setInputName(String inputName);

    @TemplateParameter.Text(
        order = 3,
        optional = false,
        regexes = {"[a-zA-Z0-9._-]+"},
        description = "JMS Destination Type to read the input from",
        helpText = "The JMS destination type to read data from. Can be a queue or a topic.",
        example = "queue")
    @Validation.Required
    String getInputType();

    void setInputType(String inputType);

    @TemplateParameter.PubsubTopic(
        order = 4,
        groupName = "Target",
        description = "Output Pub/Sub topic",
        helpText =
            "The name of the Pub/Sub topic to publish data to, in the format `projects/<PROJECT_ID>/topics/<TOPIC_NAME>`.",
        example = "projects/your-project-id/topics/your-topic-name")
    @Validation.Required
    String getOutputTopic();

    void setOutputTopic(String outputTopic);

    @TemplateParameter.Text(
        order = 5,
        description = "JMS Username",
        helpText = "The username to use for authentication on the JMS server.",
        example = "sampleusername")
    String getUsername();

    void setUsername(String username);

    @TemplateParameter.Password(
        order = 6,
        description = "JMS Password",
        helpText = "The password associated with the provided username.",
        example = "samplepassword")
    String getPassword();

    void setPassword(String password);
  }
}

What's next

• Learn about Dataflow templates.
• See the list of Google-provided templates.