public static void main(String[] args) throws IOException { Configuration conf = HBaseConfiguration.create(); conf.set( "hbase.zookeeper.quorum", "master-1.internal.larsgeorge.com," + "master-2.internal.larsgeorge.com,master-3.internal.larsgeorge.com"); HBaseHelper helper = HBaseHelper.getHelper(conf); helper.dropTable("testtable"); helper.createTable("testtable", "colfam1"); System.out.println("Adding rows to table..."); helper.fillTable("testtable", 1, 5, 1, "colfam1"); System.out.println("Table before the operations:"); helper.dump("testtable"); Connection connection = ConnectionFactory.createConnection(conf); TableName tableName = TableName.valueOf("testtable"); Table table = connection.getTable(tableName); // vv ScanConsistencyExample1 Scan scan = new Scan(); scan.setCaching( 1); // co ScanConsistencyExample1-1-ConfScan Configure scan to iterate over each row // separately. ResultScanner scanner = table.getScanner(scan); // ^^ ScanConsistencyExample1 System.out.println("Starting scan, reading one row..."); // vv ScanConsistencyExample1 Result result = scanner.next(); helper.dumpResult(result); // ^^ ScanConsistencyExample1 System.out.println("Applying mutations..."); // vv ScanConsistencyExample1 Put put = new Put(Bytes.toBytes("row-3")); put.addColumn(Bytes.toBytes("colfam1"), Bytes.toBytes("col-1"), Bytes.toBytes("val-999")); table.put(put); // co ScanConsistencyExample1-2-Put Update a later row with a new value. Delete delete = new Delete(Bytes.toBytes("row-4")); table.delete( delete); // co ScanConsistencyExample1-3-Delete Remove an entire row, that is located at the // end of the scan. // ^^ ScanConsistencyExample1 System.out.println("Resuming original scan..."); // vv ScanConsistencyExample1 for (Result result2 : scanner) { helper.dumpResult( result2); // co ScanConsistencyExample1-4-Scan Scan the rest of the table to see if the // mutations are visible. } scanner.close(); // ^^ ScanConsistencyExample1 System.out.println("Print table under new scanner..."); // vv ScanConsistencyExample1 helper.dump( "testtable"); // co ScanConsistencyExample1-5-Dump Print the entire table again, with a new // scanner instance. // ^^ ScanConsistencyExample1 table.close(); connection.close(); helper.close(); }