package filters; // cc PrefixFilterExample Example using the prefix based filter import java.io.IOException; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.hbase.Cell; 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.Get; import org.apache.hadoop.hbase.client.Result; import org.apache.hadoop.hbase.client.ResultScanner; import org.apache.hadoop.hbase.client.Scan; import org.apache.hadoop.hbase.client.Table; import org.apache.hadoop.hbase.filter.Filter; import org.apache.hadoop.hbase.filter.PrefixFilter; import org.apache.hadoop.hbase.util.Bytes; import util.HBaseHelper; public class PrefixFilterExample { public static void main(String[] args) throws IOException { Configuration conf = HBaseConfiguration.create(); HBaseHelper helper = HBaseHelper.getHelper(conf); helper.dropTable("testtable"); helper.createTable("testtable", "colfam1", "colfam2"); System.out.println("Adding rows to table..."); helper.fillTable("testtable", 1, 10, 10, "colfam1", "colfam2"); Connection connection = ConnectionFactory.createConnection(conf); Table table = connection.getTable(TableName.valueOf("testtable")); // vv PrefixFilterExample Filter filter = new PrefixFilter(Bytes.toBytes("row-1")); Scan scan = new Scan(); scan.setFilter(filter); ResultScanner scanner = table.getScanner(scan); // ^^ PrefixFilterExample System.out.println("Results of scan:"); // vv PrefixFilterExample for (Result result : scanner) { for (Cell cell : result.rawCells()) { System.out.println("Cell: " + cell + ", Value: " + Bytes.toString(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength())); } } scanner.close(); Get get = new Get(Bytes.toBytes("row-5")); get.setFilter(filter); Result result = table.get(get); // ^^ PrefixFilterExample System.out.println("Result of get: "); // vv PrefixFilterExample for (Cell cell : result.rawCells()) { System.out.println("Cell: " + cell + ", Value: " + Bytes.toString(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength())); } // ^^ PrefixFilterExample } }