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.

    }
    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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  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.addColumn(Bytes.toBytes("somefamily"), Bytes.toBytes("somequalifier"), 1L);
    try {
      region.increment(inc, false);
    } catch (IOException e) {
      exceptionCaught = true;
    } finally {

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      int row1Field2 = 1;
      Put put1 = new Put(row1);
      put1.add(fam1, qual1, Bytes.toBytes(row1Field1));
      put1.add(fam1, qual2, Bytes.toBytes(row1Field2));
      region.put(put1);
      Increment increment = new Increment(row1);
      increment.addColumn(fam1, qual1, 1);


      //here we should be successful as normal
      region.increment(increment, null, true);
      assertICV(row1, fam1, qual1, row1Field1 + 1);


      //failed to increment
      increment = new Increment(row1);
      increment.addColumn(fam1, qual2, 1);
      try {
        region.increment(increment, null, true);
        fail("Expected to fail here");
      } catch (Exception exception) {
        // Expected.

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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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    @Override
    public void run() {
      int count = 0;
      while (count < incCounter) {
        Increment inc = new Increment(incRow);
        inc.addColumn(family, qualifier, ONE);
        count++;
        try {
          region.increment(inc, null, true);
        } catch (IOException e) {
          e.printStackTrace();

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    verifyWrite(deleteAction);


    // increment action
    PrivilegedExceptionAction incrementAction = new PrivilegedExceptionAction() {
      public Object run() throws Exception {
        Increment inc = new Increment(Bytes.toBytes("random_row"));
        inc.addColumn(TEST_FAMILY, Bytes.toBytes("Qualifier"), 1);
        HTable t = new HTable(conf, TEST_TABLE);
        try {
          t.increment(inc);
        } finally {
          t.close();

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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]);
      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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      hTable.put(Arrays.asList(new Put[] { pThree, pFour }));
  
      hTable.incrementColumnValue(rk.getBytes(), cf.getBytes(), icvCol.getBytes(), 1L);
      
      Increment i = new Increment(rk.getBytes());
      i.addColumn(cf.getBytes(), icvCol.getBytes(), 1L);
      hTable.increment(i);
  
      Get g = new Get(rk.getBytes());
      g.addColumn(cf.getBytes(), appendCol.getBytes());
      hTable.get(g);

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