Increment a cell (HBase)

Send a write request that increments an existing numeric value. This type of write makes a ReadModifyWriteRow API request.

Explore further

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

Code sample


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 org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.util.Bytes;

public class WriteIncrement {

  private static final byte[] COLUMN_FAMILY_NAME = Bytes.toBytes("stats_summary");

  public static void writeIncrement(String projectId, String instanceId, String tableId) {
    // String projectId = "my-project-id";
    // String instanceId = "my-instance-id";
    // String tableId = "mobile-time-series";

    try (Connection connection = BigtableConfiguration.connect(projectId, instanceId)) {
      Table table = connection.getTable(TableName.valueOf(Bytes.toBytes(tableId)));

      String rowKey = "phone#4c410523#20190501";

          Bytes.toBytes(rowKey), COLUMN_FAMILY_NAME, Bytes.toBytes("connected_cell"), -1);

      System.out.printf("Successfully updated row %s", rowKey);

    } catch (Exception e) {
      System.out.println("Error during WriteIncrement: \n" + e.toString());

What's next

To search and filter code samples for other Google Cloud products, see the Google Cloud sample browser.