package client; // cc BatchSameRowExample Example application using batch operations, modifying the same row import java.io.IOException; import java.util.ArrayList; import java.util.List; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.hbase.HBaseConfiguration; import org.apache.hadoop.hbase.TableName; import org.apache.hadoop.hbase.client.Connection; import org.apache.hadoop.hbase.client.ConnectionFactory; import org.apache.hadoop.hbase.client.Delete; import org.apache.hadoop.hbase.client.Get; import org.apache.hadoop.hbase.client.Put; import org.apache.hadoop.hbase.client.Row; import org.apache.hadoop.hbase.client.Table; import org.apache.hadoop.hbase.util.Bytes; import util.HBaseHelper; public class BatchSameRowExample { private final static byte[] ROW1 = Bytes.toBytes("row1"); private final static byte[] COLFAM1 = Bytes.toBytes("colfam1"); private final static byte[] QUAL1 = Bytes.toBytes("qual1"); public static void main(String[] args) throws IOException, InterruptedException { Configuration conf = HBaseConfiguration.create(); HBaseHelper helper = HBaseHelper.getHelper(conf); helper.dropTable("testtable"); helper.createTable("testtable", "colfam1"); helper.put("testtable", "row1", "colfam1", "qual1", 1L, "val1"); System.out.println("Before batch call..."); helper.dump("testtable", new String[] { "row1" }, null, null); Connection connection = ConnectionFactory.createConnection(conf); Table table = connection.getTable(TableName.valueOf("testtable")); // vv BatchSameRowExample List<Row> batch = new ArrayList<Row>(); Put put = new Put(ROW1); put.addColumn(COLFAM1, QUAL1, 2L, Bytes.toBytes("val2")); batch.add(put); Get get1 = new Get(ROW1); get1.addColumn(COLFAM1, QUAL1); batch.add(get1); Delete delete = new Delete(ROW1); delete.addColumns(COLFAM1, QUAL1, 3L); // co BatchSameRowExample-1-AddDelete Delete the row that was just put above. batch.add(delete); Get get2 = new Get(ROW1); get1.addColumn(COLFAM1, QUAL1); batch.add(get2); Object[] results = new Object[batch.size()]; try { table.batch(batch, results); } catch (Exception e) { System.err.println("Error: " + e); } // ^^ BatchSameRowExample for (int i = 0; i < results.length; i++) { System.out.println("Result[" + i + "]: type = " + results[i].getClass().getSimpleName() + "; " + results[i]); } table.close(); connection.close(); System.out.println("After batch call..."); helper.dump("testtable", new String[]{"row1"}, null, null); helper.close(); } }