Exemplo n.º 1
0
  public static void main(String[] args)
      throws InvalidRequestException, NotFoundException, UnavailableException, TimedOutException,
          TException, UnsupportedEncodingException {
    TTransport tr = new TSocket("192.168.10.2", 9160);
    TProtocol proto = new TBinaryProtocol(tr);

    Cassandra.Client client = new Cassandra.Client(proto);
    tr.open();

    String keyspace = "Keyspace1";
    String cf = "Standard2";
    String key = "studentA";
    // Insert
    long timestamp = System.currentTimeMillis();
    ColumnPath path = new ColumnPath(cf);
    path.setColumn("age".getBytes("UTF-8"));
    client.insert(keyspace, key, path, "18".getBytes("UTF-8"), timestamp, ConsistencyLevel.ONE);

    path.setColumn("height".getBytes("UTF-8"));
    client.insert(keyspace, key, path, "172cm".getBytes("UTF-8"), timestamp, ConsistencyLevel.ONE);

    // Read
    path.setColumn("height".getBytes("UTF-8"));
    ColumnOrSuperColumn cc = client.get(keyspace, key, path, ConsistencyLevel.ONE);
    Column c = cc.getColumn();

    String v = new String(c.value, "UTF-8");

    System.out.println("Read studentA height:" + v);

    tr.close();
  }
Exemplo n.º 2
0
  @Test
  public void testBatchMutateBatchMutation() throws HectorException {
    BatchMutation<String> batchMutation = new BatchMutation<String>(StringSerializer.get());
    List<String> columnFamilies = Arrays.asList("Standard1");
    for (int i = 0; i < 10; i++) {

      for (int j = 0; j < 10; j++) {
        Column col =
            new Column(
                StringSerializer.get().toByteBuffer("testBatchMutateColumn_" + j),
                StringSerializer.get().toByteBuffer("testBatchMutateColumn_value_" + j),
                connectionManager.createClock());
        batchMutation.addInsertion("testBatchMutateColumn_" + i, columnFamilies, col);
      }
    }
    keyspace.batchMutate(batchMutation);

    // get value
    for (int i = 0; i < 10; i++) {
      for (int j = 0; j < 10; j++) {
        ColumnPath cp = new ColumnPath("Standard1");
        cp.setColumn(bytes("testBatchMutateColumn_" + j));

        Column col = keyspace.getColumn("testBatchMutateColumn_" + i, cp);
        assertNotNull(col);
        String value = string(col.getValue());
        assertEquals("testBatchMutateColumn_value_" + j, value);
      }
    }
    batchMutation = new BatchMutation<String>(StringSerializer.get());
    // batch_mutate delete by key
    for (int i = 0; i < 10; i++) {
      SlicePredicate slicePredicate = new SlicePredicate();
      for (int j = 0; j < 10; j++) {
        slicePredicate.addToColumn_names(
            StringSerializer.get().toByteBuffer("testBatchMutateColumn_" + j));
      }
      Deletion deletion = new Deletion(connectionManager.createClock());
      deletion.setPredicate(slicePredicate);
      batchMutation.addDeletion("testBatchMutateColumn_" + i, columnFamilies, deletion);
    }
    keyspace.batchMutate(batchMutation);
    // make sure the values are gone
    for (int i = 0; i < 10; i++) {
      for (int j = 0; j < 10; j++) {
        ColumnPath cp = new ColumnPath("Standard1");
        cp.setColumn(bytes("testBatchMutateColumn_" + j));
        try {
          keyspace.getColumn("testBatchMutateColumn_" + i, cp);
          fail();
        } catch (HNotFoundException e) {
          // good, we want this to throw.
        }
      }
    }
  }
Exemplo n.º 3
0
  @Test
  public void testInsertAndGetAndRemoveCounter()
      throws IllegalArgumentException, NoSuchElementException, IllegalStateException,
          HNotFoundException, Exception {

    StringSerializer ss = StringSerializer.get();
    // insert value
    ColumnParent cp = new ColumnParent("Counter1");
    // cp.setColumn(bytes("testInsertAndGetAndRemoveCounter"));

    // Insert 3 counters for the same key
    keyspace.addCounter("testInsertAndGetAndRemoveCounter_key1", cp, createCounterColumn("A", 5L));
    keyspace.addCounter("testInsertAndGetAndRemoveCounter_key1", cp, createCounterColumn("A", -1L));
    keyspace.addCounter("testInsertAndGetAndRemoveCounter_key1", cp, createCounterColumn("B", 10L));
    // Total for counter A is (5 - 1) = 4.
    // Total for counter B is 10.

    ColumnPath cph = new ColumnPath("Counter1");
    cph.setColumn(ss.toByteBuffer("A"));
    Counter counter = keyspace.getCounter("testInsertAndGetAndRemoveCounter_key1", cph);
    assertNotNull(counter);
    assertEquals(4, counter.getColumn().value);

    cph.setColumn(ss.toByteBuffer("B"));
    counter = keyspace.getCounter("testInsertAndGetAndRemoveCounter_key1", cph);
    assertNotNull(counter);
    assertEquals(10, counter.getColumn().value);

    // Reuse the ColumnPath associated to Conter B and remove only B.
    keyspace.removeCounter("testInsertAndGetAndRemoveCounter_key1", cph);

    // Fetch it and it should not exist
    try {
      keyspace.getCounter("testInsertAndGetAndRemoveCounter_key1", cph);
    } catch (HNotFoundException e) {
      // good
    }

    // Fetch Counter A again to verify I did not delete it
    cph.setColumn(ss.toByteBuffer("A"));
    counter = keyspace.getCounter("testInsertAndGetAndRemoveCounter_key1", cph);
    assertNotNull(counter);

    // Delete the whole row
    cph.column = null;
    keyspace.removeCounter("testInsertAndGetAndRemoveCounter_key1", cph);

    // Fetch A again to verify it is not there.
    try {
      cph.setColumn(ss.toByteBuffer("A"));
      counter = keyspace.getCounter("testInsertAndGetAndRemoveCounter_key1", cph);
    } catch (HNotFoundException e) {
      // good
    }
  }
Exemplo n.º 4
0
  @Test
  public void testBatchUpdateInsertAndDelOnSame() throws HectorException {

    ColumnPath sta1 = new ColumnPath("Standard1");
    sta1.setColumn(bytes("deleteThroughInserBatch_col"));

    keyspace.insert(
        "deleteThroughInserBatch_key",
        sta1,
        StringSerializer.get().toByteBuffer("deleteThroughInserBatch_val"));

    Column found = keyspace.getColumn("deleteThroughInserBatch_key", sta1);
    assertNotNull(found);

    BatchMutation<String> batchMutation = new BatchMutation<String>(StringSerializer.get());
    List<String> columnFamilies = Arrays.asList("Standard1");
    for (int i = 0; i < 10; i++) {

      for (int j = 0; j < 10; j++) {
        Column col =
            new Column(
                StringSerializer.get().toByteBuffer("testBatchMutateColumn_" + j),
                StringSerializer.get().toByteBuffer("testBatchMutateColumn_value_" + j),
                connectionManager.createClock());
        batchMutation.addInsertion("testBatchMutateColumn_" + i, columnFamilies, col);
      }
    }
    SlicePredicate slicePredicate = new SlicePredicate();
    slicePredicate.addToColumn_names(
        StringSerializer.get().toByteBuffer("deleteThroughInserBatch_col"));

    Deletion deletion = new Deletion(connectionManager.createClock());
    deletion.setPredicate(slicePredicate);

    batchMutation.addDeletion("deleteThroughInserBatch_key", columnFamilies, deletion);
    keyspace.batchMutate(batchMutation);
    try {
      keyspace.getColumn("deleteThroughInserBatch_key", sta1);
      fail("Should not have found a value here");
    } catch (Exception e) {
    }
    // get value
    for (int i = 0; i < 10; i++) {
      for (int j = 0; j < 10; j++) {
        ColumnPath cp = new ColumnPath("Standard1");
        cp.setColumn(bytes("testBatchMutateColumn_" + j));

        Column col = keyspace.getColumn("testBatchMutateColumn_" + i, cp);
        assertNotNull(col);
        String value = string(col.getValue());
        assertEquals("testBatchMutateColumn_value_" + j, value);
      }
    }
  }
Exemplo n.º 5
0
  @Test
  public void testMultigetColumn() throws HectorException {
    // insert value
    ColumnPath cp = new ColumnPath("Standard1");
    cp.setColumn(bytes("testMultigetColumn"));
    ArrayList<String> keys = new ArrayList<String>(100);
    for (int i = 0; i < 100; i++) {
      keyspace.insert(
          "testMultigetColumn_" + i,
          cp,
          StringSerializer.get().toByteBuffer("testMultigetColumn_value_" + i));
      keys.add("testMultigetColumn_" + i);
    }

    // get value
    /*
    Map<String, Column> ms = keyspace.multigetColumn(keys, cp);
    for (int i = 0; i < 100; i++) {
      Column cl = ms.get(keys.get(i));
      assertNotNull(cl);
      assertEquals("testMultigetColumn_value_" + i, string(cl.getValue()));
    }
    */

    // remove value
    for (int i = 0; i < 100; i++) {
      keyspace.remove("testMultigetColumn_" + i, cp);
    }
  }
Exemplo n.º 6
0
  @Test
  public void testGetSlice() throws HectorException {
    // insert value
    ArrayList<String> columnnames = new ArrayList<String>(100);
    for (int i = 0; i < 100; i++) {
      ColumnPath cp = new ColumnPath("Standard1");
      cp.setColumn(bytes("testGetSlice_" + i));
      keyspace.insert(
          "testGetSlice", cp, StringSerializer.get().toByteBuffer("testGetSlice_Value_" + i));
      columnnames.add("testGetSlice_" + i);
    }

    // get value
    ColumnParent clp = new ColumnParent("Standard1");
    SliceRange sr =
        new SliceRange(ByteBuffer.wrap(new byte[0]), ByteBuffer.wrap(new byte[0]), false, 150);
    SlicePredicate sp = new SlicePredicate();
    sp.setSlice_range(sr);
    List<Column> cols = keyspace.getSlice("testGetSlice", clp, sp);

    assertNotNull(cols);
    assertEquals(100, cols.size());

    Collections.sort(columnnames);
    ArrayList<String> gotlist = new ArrayList<String>(100);
    for (int i = 0; i < 100; i++) {
      gotlist.add(string(cols.get(i).getName()));
    }
    assertEquals(columnnames, gotlist);

    ColumnPath cp = new ColumnPath("Standard1");
    keyspace.remove("testGetSlice_", cp);
    keyspace.remove("testGetSlice", cp);
  }
Exemplo n.º 7
0
  @Test
  public void testMultigetSlice() throws HectorException {
    // insert value
    ColumnPath cp = new ColumnPath("Standard1");
    cp.setColumn(bytes("testMultigetSlice"));
    ArrayList<String> keys = new ArrayList<String>(100);
    for (int i = 0; i < 100; i++) {
      keyspace.insert(
          "testMultigetSlice_" + i,
          cp,
          StringSerializer.get().toByteBuffer("testMultigetSlice_value_" + i));
      keys.add("testMultigetSlice_" + i);
    }
    // get value
    ColumnParent clp = new ColumnParent("Standard1");
    SliceRange sr =
        new SliceRange(ByteBuffer.wrap(new byte[0]), ByteBuffer.wrap(new byte[0]), false, 150);
    SlicePredicate sp = new SlicePredicate();
    sp.setSlice_range(sr);
    Map<String, List<Column>> ms =
        se.fromBytesMap(keyspace.multigetSlice(se.toBytesList(keys), clp, sp));
    for (int i = 0; i < 100; i++) {
      List<Column> cl = ms.get(keys.get(i));
      assertNotNull(cl);
      assertEquals(1, cl.size());
      assertTrue(string(cl.get(0).getValue()).startsWith("testMultigetSlice_"));
    }

    // remove value
    for (int i = 0; i < 100; i++) {
      keyspace.remove("testMultigetSlice_" + i, cp);
    }
  }
Exemplo n.º 8
0
  public static void main(String[] args) throws HectorException {
    CassandraClientPool pool = CassandraClientPoolFactory.INSTANCE.get();
    CassandraClient client = pool.borrowClient("tush", 9160);
    // A load balanced version would look like this:
    // CassandraClient client = pool.borrowClient(new String[] {"cas1:9160", "cas2:9160",
    // "cas3:9160"});

    try {
      Keyspace keyspace = client.getKeyspace("Keyspace1");
      ColumnPath columnPath = new ColumnPath("Standard1");
      ColumnParent columnParent = new ColumnParent("Standard1");
      columnPath.setColumn(bytes("column-name"));

      // insert
      keyspace.insert(
          bytes("key"),
          columnParent,
          new Column(bytes("column-name"), bytes("value"), keyspace.createClock()));

      // read
      Column col = keyspace.getColumn(bytes("key"), columnPath);

      System.out.println("Read from cassandra: " + string(col.getValue()));

      // This line makes sure that even if the client had failures and recovered, a correct
      // releaseClient is called, on the up to date client.
      client = keyspace.getClient();
    } finally {
      // return client to pool. do it in a finally block to make sure it's executed
      pool.releaseClient(client);
    }
  }
  @PooledConnection
  public void deleteColumn(
      String keyspace,
      String column_family,
      String key,
      String column,
      ConsistencyLevel consistency_level,
      boolean purgeIndex)
      throws InvalidRequestException, UnavailableException, TimedOutException, TException,
          HttpException, IOException {
    ColumnPath path = new ColumnPath(column_family);
    path.setColumn(ByteBufferUtil.bytes(column));
    getConnection(keyspace)
        .remove(
            ByteBufferUtil.bytes(key), path, System.currentTimeMillis() * 1000, consistency_level);

    // TODO: Revisit deleting a single field because it requires a fetch
    // first.
    // Evidently it is impossible to remove just a field from a document in
    // SOLR
    // http://stackoverflow.com/questions/4802620/can-you-delete-a-field-from-a-document-in-solr-index
    if (config.isIndexingEnabled() && purgeIndex) {
      indexer.delete(column_family, key);
      JSONObject json = this.getSlice(keyspace, column_family, key, consistency_level);
      json.remove(column);
      indexer.index(column_family, key, json);
    }
  }
Exemplo n.º 10
0
  @Test
  public void testGetSuperSlice() throws HectorException {
    // insert value
    for (int i = 0; i < 100; i++) {
      ColumnPath cp = new ColumnPath("Super1");

      cp.setSuper_column(bytes("SuperColumn_1"));
      cp.setColumn(bytes("testGetSuperSlice_" + i));

      ColumnPath cp2 = new ColumnPath("Super1");

      cp2.setSuper_column(bytes("SuperColumn_2"));
      cp2.setColumn(bytes("testGetSuperSlice_" + i));

      keyspace.insert(
          "testGetSuperSlice",
          cp,
          StringSerializer.get().toByteBuffer("testGetSuperSlice_Value_" + i));
      keyspace.insert(
          "testGetSuperSlice",
          cp2,
          StringSerializer.get().toByteBuffer("testGetSuperSlice_Value_" + i));
    }

    // get value
    ColumnParent clp = new ColumnParent("Super1");
    SliceRange sr =
        new SliceRange(ByteBuffer.wrap(new byte[0]), ByteBuffer.wrap(new byte[0]), false, 150);
    SlicePredicate sp = new SlicePredicate();
    sp.setSlice_range(sr);
    List<SuperColumn> cols = keyspace.getSuperSlice("testGetSuperSlice", clp, sp);

    assertNotNull(cols);
    assertEquals(2, cols.size());

    ColumnPath cp = new ColumnPath("Super1");
    keyspace.remove("testGetSuperSlice", cp);
  }
Exemplo n.º 11
0
 @PooledConnection
 public String getColumn(
     String keyspace,
     String columnFamily,
     String key,
     String column,
     ConsistencyLevel consistencyLevel)
     throws InvalidRequestException, NotFoundException, UnavailableException, TimedOutException,
         TException, UnsupportedEncodingException {
   ColumnPath path = new ColumnPath(columnFamily);
   path.setColumn(ByteBufferUtil.bytes(column));
   ColumnOrSuperColumn column_result =
       getConnection(keyspace).get(ByteBufferUtil.bytes(key), path, consistencyLevel);
   return new String(column_result.getColumn().getValue(), "UTF8");
 }
Exemplo n.º 12
0
  @Test
  public void testGetRangeSlices() throws HectorException {
    for (int i = 0; i < 10; i++) {
      ColumnPath cp = new ColumnPath("Standard1");
      cp.setColumn(bytes("testGetRangeSlices_" + i));

      keyspace.insert(
          "testGetRangeSlices0",
          cp,
          StringSerializer.get().toByteBuffer("testGetRangeSlices_Value_" + i));
      keyspace.insert(
          "testGetRangeSlices1",
          cp,
          StringSerializer.get().toByteBuffer("testGetRangeSlices_Value_" + i));
      keyspace.insert(
          "testGetRangeSlices2",
          cp,
          StringSerializer.get().toByteBuffer("testGetRangeSlices_Value_" + i));
    }

    // get value
    ColumnParent clp = new ColumnParent("Standard1");
    SliceRange sr =
        new SliceRange(ByteBuffer.wrap(new byte[0]), ByteBuffer.wrap(new byte[0]), false, 150);
    SlicePredicate sp = new SlicePredicate();
    sp.setSlice_range(sr);

    KeyRange range = new KeyRange();
    range.setStart_key("".getBytes());
    range.setEnd_key("".getBytes());

    Map<String, List<Column>> keySlices = se.fromBytesMap(keyspace.getRangeSlices(clp, sp, range));

    assertNotNull(keySlices);

    assertNotNull("testGetRangeSlices1 is null", keySlices.get("testGetRangeSlices1"));
    assertEquals(
        "testGetRangeSlices_Value_0",
        string(keySlices.get("testGetRangeSlices1").get(0).getValue()));
    assertEquals(10, keySlices.get("testGetRangeSlices1").size());

    ColumnPath cp = new ColumnPath("Standard1");
    keyspace.remove("testGetRanageSlices0", cp);
    keyspace.remove("testGetRanageSlices1", cp);
    keyspace.remove("testGetRanageSlices2", cp);
  }
Exemplo n.º 13
0
  @Test
  public void testGetRangeSlice() throws HectorException {
    for (int i = 0; i < 10; i++) {
      ColumnPath cp = new ColumnPath("Standard1");
      cp.setColumn(bytes("testGetRangeSlice_" + i));

      keyspace.insert(
          "testGetRangeSlice0",
          cp,
          StringSerializer.get().toByteBuffer("testGetRangeSlice_Value_" + i));
      keyspace.insert(
          "testGetRangeSlice1",
          cp,
          StringSerializer.get().toByteBuffer("testGetRangeSlice_Value_" + i));
      keyspace.insert(
          "testGetRangeSlice2",
          cp,
          StringSerializer.get().toByteBuffer("testGetRangeSlice_Value_" + i));
    }

    // get value
    ColumnParent clp = new ColumnParent("Standard1");
    SliceRange sr =
        new SliceRange(ByteBuffer.wrap(new byte[0]), ByteBuffer.wrap(new byte[0]), false, 150);
    SlicePredicate sp = new SlicePredicate();
    sp.setSlice_range(sr);
    /*
    @SuppressWarnings("deprecation")
    Map<String, List<Column>> keySlices = keyspace.getRangeSlice(clp, sp, "testGetRangeSlice0", "testGetRangeSlice3", 5);

    assertNotNull(keySlices);
    assertEquals(3, keySlices.size());
    assertNotNull("testGetRangeSlice1 is null", keySlices.get("testGetRangeSlice1"));
    assertEquals("testGetRangeSlice_Value_0", string(keySlices.get("testGetRangeSlice1").get(0).getValue()));
    assertEquals(10, keySlices.get("testGetRangeSlice1").size());
    */

    ColumnPath cp = new ColumnPath("Standard1");
    keyspace.remove("testGetRanageSlice0", cp);
    keyspace.remove("testGetRanageSlice1", cp);
    keyspace.remove("testGetRanageSlice2", cp);
  }
Exemplo n.º 14
0
  @Test
  public void testGetCount() throws HectorException {
    // insert values
    for (int i = 0; i < 100; i++) {
      ColumnPath cp = new ColumnPath("Standard1");
      cp.setColumn(bytes("testInsertAndGetAndRemove_" + i));
      keyspace.insert(
          "testGetCount",
          cp,
          StringSerializer.get().toByteBuffer("testInsertAndGetAndRemove_value_" + i));
    }

    // get value
    ColumnParent clp = new ColumnParent("Standard1");
    // int count = keyspace.getCount("testGetCount", clp, se);
    // assertEquals(100, count);

    ColumnPath cp = new ColumnPath("Standard1");
    keyspace.remove("testGetCount", cp);
  }
Exemplo n.º 15
0
  @Test
  public void testMultigetCount() {
    // insert 25 columns into 10 rows
    List<ByteBuffer> keys = new ArrayList<ByteBuffer>();
    for (int j = 0; j < 10; j++) {
      for (int i = 0; i < 25; i++) {
        ColumnPath cp = new ColumnPath("Standard1");
        cp.setColumn(StringSerializer.get().toByteBuffer("testMultigetCount_column_" + i));
        keyspace.insert(
            "testMultigetCount_key_" + j,
            cp,
            StringSerializer.get().toByteBuffer("testMultigetCount_value_" + i));
      }
      if (j % 2 == 0) {
        keys.add(StringSerializer.get().toByteBuffer("testMultigetCount_key_" + j));
      }
    }

    // get value
    ColumnParent clp = new ColumnParent("Standard1");
    SlicePredicate slicePredicate = new SlicePredicate();
    SliceRange sr =
        new SliceRange(ByteBuffer.wrap(new byte[0]), ByteBuffer.wrap(new byte[0]), false, 150);
    slicePredicate.setSlice_range(sr);
    Map<ByteBuffer, Integer> counts = keyspace.multigetCount(keys, clp, slicePredicate);
    assertEquals(5, counts.size());
    assertEquals(new Integer(25), counts.entrySet().iterator().next().getValue());

    slicePredicate.setSlice_range(
        new SliceRange(
            StringSerializer.get().toByteBuffer(""),
            StringSerializer.get().toByteBuffer(""),
            false,
            5));
    counts = keyspace.multigetCount(keys, clp, slicePredicate);

    assertEquals(5, counts.size());
    assertEquals(new Integer(5), counts.entrySet().iterator().next().getValue());
  }
Exemplo n.º 16
0
  @Test
  public void testInsertAndGetAndRemove()
      throws IllegalArgumentException, NoSuchElementException, IllegalStateException,
          HNotFoundException, Exception {

    // insert value
    ColumnPath cp = new ColumnPath("Standard1");
    cp.setColumn(bytes("testInsertAndGetAndRemove"));
    for (int i = 0; i < 100; i++) {
      keyspace.insert(
          "testInsertAndGetAndRemove_" + i,
          cp,
          StringSerializer.get().toByteBuffer("testInsertAndGetAndRemove_value_" + i));
    }

    // get value
    for (int i = 0; i < 100; i++) {
      Column col = keyspace.getColumn("testInsertAndGetAndRemove_" + i, cp);
      assertNotNull(col);
      String value = string(col.getValue());
      assertEquals("testInsertAndGetAndRemove_value_" + i, value);
    }

    // remove value
    for (int i = 0; i < 100; i++) {
      keyspace.remove("testInsertAndGetAndRemove_" + i, cp);
    }

    // get already removed value
    for (int i = 0; i < 100; i++) {
      try {
        keyspace.getColumn("testInsertAndGetAndRemove_" + i, cp);
        fail("the value should already being deleted");
      } catch (HNotFoundException e) {
        // good
      }
    }
  }
Exemplo n.º 17
0
  @Test
  public void testBatchMutate() throws HectorException {
    Map<String, Map<String, List<Mutation>>> outerMutationMap =
        new HashMap<String, Map<String, List<Mutation>>>();
    for (int i = 0; i < 10; i++) {

      Map<String, List<Mutation>> mutationMap = new HashMap<String, List<Mutation>>();

      ArrayList<Mutation> mutations = new ArrayList<Mutation>(10);
      for (int j = 0; j < 10; j++) {
        Column col =
            new Column(
                StringSerializer.get().toByteBuffer("testBatchMutateColumn_" + j),
                StringSerializer.get().toByteBuffer("testBatchMutateColumn_value_" + j),
                connectionManager.createClock());
        // list.add(col);
        ColumnOrSuperColumn cosc = new ColumnOrSuperColumn();
        cosc.setColumn(col);
        Mutation mutation = new Mutation();
        mutation.setColumn_or_supercolumn(cosc);
        mutations.add(mutation);
      }
      mutationMap.put("Standard1", mutations);
      outerMutationMap.put("testBatchMutateColumn_" + i, mutationMap);
    }
    keyspace.batchMutate(se.toBytesMap(outerMutationMap));
    // re-use later
    outerMutationMap.clear();

    // get value
    for (int i = 0; i < 10; i++) {
      for (int j = 0; j < 10; j++) {
        ColumnPath cp = new ColumnPath("Standard1");
        cp.setColumn(bytes("testBatchMutateColumn_" + j));

        Column col = keyspace.getColumn("testBatchMutateColumn_" + i, cp);
        assertNotNull(col);
        String value = string(col.getValue());
        assertEquals("testBatchMutateColumn_value_" + j, value);
      }
    }

    // batch_mutate delete by key
    for (int i = 0; i < 10; i++) {
      ArrayList<Mutation> mutations = new ArrayList<Mutation>(10);
      Map<String, List<Mutation>> mutationMap = new HashMap<String, List<Mutation>>();
      SlicePredicate slicePredicate = new SlicePredicate();
      for (int j = 0; j < 10; j++) {
        slicePredicate.addToColumn_names(
            StringSerializer.get().toByteBuffer("testBatchMutateColumn_" + j));
      }
      Mutation mutation = new Mutation();
      Deletion deletion = new Deletion(connectionManager.createClock());
      deletion.setPredicate(slicePredicate);
      mutation.setDeletion(deletion);
      mutations.add(mutation);

      mutationMap.put("Standard1", mutations);
      outerMutationMap.put("testBatchMutateColumn_" + i, mutationMap);
    }
    keyspace.batchMutate(se.toBytesMap(outerMutationMap));
    // make sure the values are gone
    for (int i = 0; i < 10; i++) {
      for (int j = 0; j < 10; j++) {
        ColumnPath cp = new ColumnPath("Standard1");
        cp.setColumn(bytes("testBatchMutateColumn_" + j));
        try {
          keyspace.getColumn("testBatchMutateColumn_" + i, cp);
          fail();
        } catch (HNotFoundException e) {
        }
      }
    }
  }