AppendExample.java

package client;

// cc AppendExample Example application appending data to a column in  HBase

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Append;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.util.Bytes;
import util.HBaseHelper;

import java.io.IOException;

public class AppendExample {

  public static void main(String[] args) throws IOException {
    Configuration conf = HBaseConfiguration.create();

    HBaseHelper helper = HBaseHelper.getHelper(conf);
    helper.dropTable("testtable");
    helper.createTable("testtable", 100, "colfam1", "colfam2");
    helper.put("testtable",
      new String[] { "row1" },
      new String[] { "colfam1" },
      new String[] { "qual1" },
      new long[]   { 1 },
      new String[] { "oldvalue" });
    System.out.println("Before append call...");
    helper.dump("testtable", new String[]{ "row1" }, null, null);

    Connection connection = ConnectionFactory.createConnection(conf);
    Table table = connection.getTable(TableName.valueOf("testtable"));

    // vv AppendExample
    Append append = new Append(Bytes.toBytes("row1"));
    append.add(Bytes.toBytes("colfam1"), Bytes.toBytes("qual1"),
      Bytes.toBytes("newvalue"));
    append.add(Bytes.toBytes("colfam1"), Bytes.toBytes("qual2"),
      Bytes.toBytes("anothervalue"));

    table.append(append);
    // ^^ AppendExample
    System.out.println("After append call...");
    helper.dump("testtable", new String[]{"row1"}, null, null);
    table.close();
    connection.close();
    helper.close();
  }
}