Examples of org.apache.hadoop.hbase.client.Increment

org.apache.hadoop.hbase.client.Increment
Used to perform Increment operations on a single row.
This operation does not appear atomic to readers. Increments are done under a single row lock, so write operations to a row are synchronized, but readers do not take row locks so get and scan operations can see this operation partially completed.
To increment columns of a row, instantiate an Increment object with the row to increment. At least one column to increment must be specified using the {@link #addColumn(byte[],byte[],long)} method.

  @Test
  public void testIncrementHook() throws IOException {
    TableName tableName = TableName.valueOf(TEST_TABLE.getNameAsString() + ".testIncrementHook");
    HTable table = util.createTable(tableName, new byte[][] {A, B, C});
    try {
      Increment inc = new Increment(Bytes.toBytes(0));
      inc.addColumn(A, A, 1);


      verifyMethodResult(SimpleRegionObserver.class,
          new String[] {"hadPreIncrement", "hadPostIncrement"},
          tableName,
          new Boolean[] {false, false}

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  @Test
  public void testIncrWithReadOnlyTable() throws Exception {
    byte[] TABLE = Bytes.toBytes("readOnlyTable");
    this.region = initHRegion(TABLE, getName(), CONF, true, Bytes.toBytes("somefamily"));
    boolean exceptionCaught = false;
    Increment inc = new Increment(Bytes.toBytes("somerow"));
    inc.setDurability(Durability.SKIP_WAL);
    inc.addColumn(Bytes.toBytes("somefamily"), Bytes.toBytes("somequalifier"), 1L);
    try {
      region.increment(inc);
    } catch (IOException e) {
      exceptionCaught = true;
    } finally {

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   */
  protected Result increment(final HRegion region, final MutationProto mutation,
      final CellScanner cells)
  throws IOException {
    long before = EnvironmentEdgeManager.currentTimeMillis();
    Increment increment = ProtobufUtil.toIncrement(mutation, cells);
    Result r = null;
    if (region.getCoprocessorHost() != null) {
      r = region.getCoprocessorHost().preIncrement(increment);
    }
    if (r == null) {

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    List<TColumnIncrement> incrementColumns = new ArrayList<TColumnIncrement>();
    incrementColumns.add(new TColumnIncrement(wrap(familyAname), wrap(qualifierAname)));
    TIncrement tIncrement = new TIncrement(wrap(rowName), incrementColumns);
    tIncrement.setAttributes(attributes);
    Increment increment = incrementFromThrift(tIncrement);
    assertArrayEquals(increment.getAttribute("attribute1"), attributeValue);


    TDelete tDelete = new TDelete(wrap(rowName));
    tDelete.setAttributes(attributes);
    Delete delete = deleteFromThrift(tDelete);
    assertArrayEquals(delete.getAttribute("attribute1"), attributeValue);

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    assertEquals(put.getDurability(), Durability.FSYNC_WAL);


    TIncrement tIncrement = new TIncrement(wrap(rowName), incrementColumns);


    tIncrement.setDurability(TDurability.SKIP_WAL);
    Increment increment = incrementFromThrift(tIncrement);
    assertEquals(increment.getDurability(), Durability.SKIP_WAL);


    tIncrement.setDurability(TDurability.ASYNC_WAL);
    increment = incrementFromThrift(tIncrement);
    assertEquals(increment.getDurability(), Durability.ASYNC_WAL);


    tIncrement.setDurability(TDurability.SYNC_WAL);
    increment = incrementFromThrift(tIncrement);
    assertEquals(increment.getDurability(), Durability.SYNC_WAL);


    tIncrement.setDurability(TDurability.FSYNC_WAL);
    increment = incrementFromThrift(tIncrement);
    assertEquals(increment.getDurability(), Durability.FSYNC_WAL);
  }

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        return;
      }


      try {
        HTable table = getTable(tincrement.getTable());
        Increment inc = ThriftUtilities.incrementFromThrift(tincrement);
        table.increment(inc);
      } catch (IOException e) {
        LOG.warn(e.getMessage(), e);
        throw new IOError(e.getMessage());
      }

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        throw new IOException("Failed delete of " + path);
      }
    }
    HRegion region = HRegion.createHRegion(hri, path, conf, htd);


    Increment odd = new Increment(rows[0]);
    Increment even = new Increment(rows[0]);
    Increment all = new Increment(rows[0]);
    for (int i=0;i<numQualifiers;i++) {
      if (i % 2 == 0) even.addColumn(families[0], qualifiers[i], 1);
      else odd.addColumn(families[0], qualifiers[i], 1);
      all.addColumn(families[0], qualifiers[i], 1);
    }


    // increment odd qualifiers 5 times and flush
    for (int i=0;i<5;i++) region.increment(odd, null, false);
    region.flushcache();

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    }
    requestCount.incrementAndGet();
    try {
      HRegion region = getRegion(regionName);
      Integer lock = getLockFromId(increment.getLockId());
      Increment incVal = increment;
      Result resVal;
      if (region.getCoprocessorHost() != null) {
        resVal = region.getCoprocessorHost().preIncrement(incVal);
        if (resVal != null) {
          return resVal;

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        throw new IOException("Failed delete of " + path);
      }
    }
    HRegion region = HRegion.createHRegion(hri, path, conf, htd);
    try {
      Increment odd = new Increment(rows[0]);
      odd.setDurability(Durability.SKIP_WAL);
      Increment even = new Increment(rows[0]);
      even.setDurability(Durability.SKIP_WAL);
      Increment all = new Increment(rows[0]);
      all.setDurability(Durability.SKIP_WAL);
      for (int i=0;i<numQualifiers;i++) {
        if (i % 2 == 0) even.addColumn(families[0], qualifiers[i], 1);
        else odd.addColumn(families[0], qualifiers[i], 1);
        all.addColumn(families[0], qualifiers[i], 1);
      }


      // increment odd qualifiers 5 times and flush
      for (int i=0;i<5;i++) region.increment(odd);
      region.flushcache();

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        StringBuilder buf = new StringBuilder();
        byte[][] columnFamilies = dataGenerator.getColumnFamilies();
        while ((rowKeyBase = getNextKeyToUpdate()) < endKey) {
          if (RandomUtils.nextInt(100) < updatePercent) {
            byte[] rowKey = dataGenerator.getDeterministicUniqueKey(rowKeyBase);
            Increment inc = new Increment(rowKey);
            Append app = new Append(rowKey);
            numKeys.addAndGet(1);
            int columnCount = 0;
            for (byte[] cf : columnFamilies) {
              long cfHash = Arrays.hashCode(cf);
              inc.addColumn(cf, INCREMENT, cfHash);
              buf.setLength(0); // Clear the buffer
              buf.append("#").append(Bytes.toString(INCREMENT));
              buf.append(":").append(MutationType.INCREMENT.getNumber());
              app.add(cf, MUTATE_INFO, Bytes.toBytes(buf.toString()));
              ++columnCount;
              if (!isBatchUpdate) {
                mutate(table, inc, rowKeyBase);
                numCols.addAndGet(1);
                inc = new Increment(rowKey);
                mutate(table, app, rowKeyBase);
                numCols.addAndGet(1);
                app = new Append(rowKey);
              }
              Result result = null;

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