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", "colfam3", "colfam4");
    System.out.println("Adding rows to table...");
    helper.fillTable("testtable", 1, 10, 2, "colfam1", "colfam2", "colfam3", "colfam4");

    HTable table = new HTable(conf, "testtable");

    // vv FamilyFilterExample
    Filter filter1 =
        new FamilyFilter(
            CompareFilter.CompareOp
                .LESS, // co FamilyFilterExample-1-Filter Create filter, while specifying the
                       // comparison operator and comparator.
            new BinaryComparator(Bytes.toBytes("colfam3")));

    Scan scan = new Scan();
    scan.setFilter(filter1);
    ResultScanner scanner =
        table.getScanner(
            scan); // co FamilyFilterExample-2-Scan Scan over table while applying the filter.
    // ^^ FamilyFilterExample
    System.out.println("Scanning table... ");
    // vv FamilyFilterExample
    for (Result result : scanner) {
      System.out.println(result);
    }
    scanner.close();

    Get get1 = new Get(Bytes.toBytes("row-5"));
    get1.setFilter(filter1);
    Result result1 =
        table.get(get1); // co FamilyFilterExample-3-Get Get a row while applying the same filter.
    System.out.println("Result of get(): " + result1);

    Filter filter2 =
        new FamilyFilter(
            CompareFilter.CompareOp.EQUAL, new BinaryComparator(Bytes.toBytes("colfam3")));
    Get get2 =
        new Get(
            Bytes.toBytes(
                "row-5")); // co FamilyFilterExample-4-Mismatch Create a filter on one column family
                           // while trying to retrieve another.
    get2.addFamily(Bytes.toBytes("colfam1"));
    get2.setFilter(filter2);
    Result result2 =
        table.get(
            get2); // co FamilyFilterExample-5-Get2 Get the same row while applying the new filter,
                   // this will return "NONE".
    System.out.println("Result of get(): " + result2);
    // ^^ FamilyFilterExample
  }
  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 SingleColumnValueFilterExample
    SingleColumnValueFilter filter =
        new SingleColumnValueFilter(
            Bytes.toBytes("colfam1"),
            Bytes.toBytes("col-5"),
            CompareFilter.CompareOp.NOT_EQUAL,
            new SubstringComparator("val-5"));
    filter.setFilterIfMissing(true);

    Scan scan = new Scan();
    scan.setFilter(filter);
    ResultScanner scanner = table.getScanner(scan);
    // ^^ SingleColumnValueFilterExample
    System.out.println("Results of scan:");
    // vv SingleColumnValueFilterExample
    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-6"));
    get.setFilter(filter);
    Result result = table.get(get);
    System.out.println("Result of get: ");
    for (Cell cell : result.rawCells()) {
      System.out.println(
          "Cell: "
              + cell
              + ", Value: "
              + Bytes.toString(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength()));
    }
    // ^^ SingleColumnValueFilterExample
  }
  public static void main(String[] args) throws IOException {
    Configuration conf = HBaseConfiguration.create();

    HBaseHelper helper = HBaseHelper.getHelper(conf);
    helper.dropTable("testtable");
    helper.createTable("testtable", "colfam1");

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

    List<Put> puts = new ArrayList<Put>();

    // vv PutListErrorExample2
    Put put1 = new Put(Bytes.toBytes("row1"));
    put1.addColumn(Bytes.toBytes("colfam1"), Bytes.toBytes("qual1"), Bytes.toBytes("val1"));
    puts.add(put1);
    Put put2 = new Put(Bytes.toBytes("row2"));
    put2.addColumn(Bytes.toBytes("BOGUS"), Bytes.toBytes("qual1"), Bytes.toBytes("val2"));
    puts.add(put2);
    Put put3 = new Put(Bytes.toBytes("row2"));
    put3.addColumn(Bytes.toBytes("colfam1"), Bytes.toBytes("qual2"), Bytes.toBytes("val3"));
    puts.add(put3);
    /*[*/ Put put4 = new Put(Bytes.toBytes("row2"));
    puts.add(
        put4); /*]*/ // co PutListErrorExample2-1-AddErrorPut Add put with no content at all to
                     // list.

    /*[*/ try {
        /*]*/
      table.put(puts);
      /*[*/ } catch (Exception e) {
      System.err.println("Error: " + e);
      // table.flushCommits();
      // todo: FIX!
      /*]*/
      // co PutListErrorExample2-2-Catch Catch local exception and commit queued updates.
      /*[*/ } /*]*/
    // ^^ PutListErrorExample2
    table.close();
    connection.close();
    helper.close();
  }
  public static void main(String[] args) throws IOException, InterruptedException {
    Configuration conf = HBaseConfiguration.create();
    HBaseHelper helper = HBaseHelper.getHelper(conf);
    helper.dropTable("testtable");
    Connection connection = ConnectionFactory.createConnection(conf);
    Admin admin = connection.getAdmin();

    // vv CreateTableWithNamespaceExample
    /*[*/ NamespaceDescriptor namespace = NamespaceDescriptor.create("testspace").build();
    admin.createNamespace(namespace); /*]*/

    TableName tableName = TableName.valueOf("testspace", "testtable");
    HTableDescriptor desc = new HTableDescriptor(tableName);

    HColumnDescriptor coldef = new HColumnDescriptor(Bytes.toBytes("colfam1"));
    desc.addFamily(coldef);

    admin.createTable(desc);
    // ^^ CreateTableWithNamespaceExample

    boolean avail = admin.isTableAvailable(tableName);
    System.out.println("Table available: " + avail);
  }
Ejemplo n.º 5
0
  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();
  }