Write data using Cloud Dataflow

Write data to Cloud Bigtable with Apache Beam.

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For detailed documentation that includes this code sample, see the following:

Code sample

Java

To learn how to install and use the client library for Bigtable, see Bigtable client libraries.

To authenticate to Bigtable, set up Application Default Credentials. For more information, see Set up authentication for a local development environment. 


import com.google.cloud.bigtable.beam.CloudBigtableIO;
import com.google.cloud.bigtable.beam.CloudBigtableTableConfiguration;
import com.google.cloud.bigtable.hbase.BigtableOptionsFactory;
import org.apache.beam.runners.dataflow.options.DataflowPipelineOptions;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.options.Default;
import org.apache.beam.sdk.options.Description;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.transforms.Create;
import org.apache.beam.sdk.transforms.DoFn;
import org.apache.beam.sdk.transforms.ParDo;
import org.apache.hadoop.hbase.client.Mutation;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.util.Bytes;

public class HelloWorldWrite {

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

    CloudBigtableTableConfiguration bigtableTableConfig =
        new CloudBigtableTableConfiguration.Builder()
            .withProjectId(options.getBigtableProjectId())
            .withInstanceId(options.getBigtableInstanceId())
            .withTableId(options.getBigtableTableId())
            .build();

    p.apply(Create.of("phone#4c410523#20190501", "phone#4c410523#20190502"))
        .apply(
            ParDo.of(
                new DoFn<String, Mutation>() {
                  @ProcessElement
                  public void processElement(@Element String rowkey, OutputReceiver<Mutation> out) {
                    long timestamp = System.currentTimeMillis();
                    Put row = new Put(Bytes.toBytes(rowkey));

                    row.addColumn(
                        Bytes.toBytes("stats_summary"),
                        Bytes.toBytes("os_build"),
                        timestamp,
                        Bytes.toBytes("android"));
                    out.output(row);
                  }
                }))
        .apply(CloudBigtableIO.writeToTable(bigtableTableConfig));

    p.run().waitUntilFinish();
  }

  public interface BigtableOptions extends DataflowPipelineOptions {

    @Description("The Bigtable project ID, this can be different than your Dataflow project")
    @Default.String("bigtable-project")
    String getBigtableProjectId();

    void setBigtableProjectId(String bigtableProjectId);

    @Description("The Bigtable instance ID")
    @Default.String("bigtable-instance")
    String getBigtableInstanceId();

    void setBigtableInstanceId(String bigtableInstanceId);

    @Description("The Bigtable table ID in the instance.")
    @Default.String("mobile-time-series")
    String getBigtableTableId();

    void setBigtableTableId(String bigtableTableId);
  }

  public static CloudBigtableTableConfiguration batchWriteFlowControlExample(
      BigtableOptions options) {
    CloudBigtableTableConfiguration bigtableTableConfig =
        new CloudBigtableTableConfiguration.Builder()
            .withProjectId(options.getBigtableProjectId())
            .withInstanceId(options.getBigtableInstanceId())
            .withTableId(options.getBigtableTableId())
            .withConfiguration(BigtableOptionsFactory.BIGTABLE_ENABLE_BULK_MUTATION_FLOW_CONTROL,
                "true")
            .build();
    return bigtableTableConfig;
  }
}

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