Examples of org.apache.hadoop.hbase.regionserver.HRegion.increment()

Package org.apache.hadoop.hbase.regionserver

Class org.apache.hadoop.hbase.regionserver.HRegion

Examples of org.apache.hadoop.hbase.regionserver.HRegion.increment()

org.apache.hadoop.hbase.regionserver.HRegion.increment()
Perform one or more increment operations on a row.
Increments performed are done under row lock but reads do not take locks out so this can be seen partially complete by gets and scans. @param increment @param writeToWAL @return new keyvalues after increment @throws IOException

    HRegion region = createHRegion(tableName, "increment", wal, Durability.USE_DEFAULT);


    // col1: amount = 1, 1 write back to WAL
    Increment inc1 = new Increment(row1);
    inc1.addColumn(FAMILY, col1, 1);
    Result res = region.increment(inc1);
    assertEquals(1, res.size());
    assertEquals(1, Bytes.toLong(res.getValue(FAMILY, col1)));
    verifyHLogCount(wal, 1);


    // col1: amount = 0, 0 write back to WAL

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    verifyHLogCount(wal, 1);


    // col1: amount = 0, 0 write back to WAL
    inc1 = new Increment(row1);
    inc1.addColumn(FAMILY, col1, 0);
    res = region.increment(inc1);
    assertEquals(1, res.size());
    assertEquals(1, Bytes.toLong(res.getValue(FAMILY, col1)));
    verifyHLogCount(wal, 1);


    // col1: amount = 0, col2: amount = 0, col3: amount = 0

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    // 0 write back to WAL
    inc1 = new Increment(row1);
    inc1.addColumn(FAMILY, col1, 0);
    inc1.addColumn(FAMILY, col2, 0);
    inc1.addColumn(FAMILY, col3, 0);
    res = region.increment(inc1);
    assertEquals(3, res.size());
    assertEquals(1, Bytes.toLong(res.getValue(FAMILY, col1)));
    assertEquals(0, Bytes.toLong(res.getValue(FAMILY, col2)));
    assertEquals(0, Bytes.toLong(res.getValue(FAMILY, col3)));
    verifyHLogCount(wal, 1);

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    // 1 write back to WAL
    inc1 = new Increment(row1);
    inc1.addColumn(FAMILY, col1, 5);
    inc1.addColumn(FAMILY, col2, 4);
    inc1.addColumn(FAMILY, col3, 3);
    res = region.increment(inc1);
    assertEquals(3, res.size());
    assertEquals(6, Bytes.toLong(res.getValue(FAMILY, col1)));
    assertEquals(4, Bytes.toLong(res.getValue(FAMILY, col2)));
    assertEquals(3, Bytes.toLong(res.getValue(FAMILY, col3)));
    verifyHLogCount(wal, 2);

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    HRegion region = createHRegion(tableName, "increment", wal, Durability.USE_DEFAULT);


    // col1: amount = 1, 1 write back to WAL
    Increment inc1 = new Increment(row1);
    inc1.addColumn(FAMILY, col1, 1);
    Result res = region.increment(inc1);
    assertEquals(1, res.size());
    assertEquals(1, Bytes.toLong(res.getValue(FAMILY, col1)));
    verifyHLogCount(wal, 1);


    // col1: amount = 0, 0 write back to WAL

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    verifyHLogCount(wal, 1);


    // col1: amount = 0, 0 write back to WAL
    inc1 = new Increment(row1);
    inc1.addColumn(FAMILY, col1, 0);
    res = region.increment(inc1);
    assertEquals(1, res.size());
    assertEquals(1, Bytes.toLong(res.getValue(FAMILY, col1)));
    verifyHLogCount(wal, 1);


    // col1: amount = 0, col2: amount = 0, col3: amount = 0

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    // 0 write back to WAL
    inc1 = new Increment(row1);
    inc1.addColumn(FAMILY, col1, 0);
    inc1.addColumn(FAMILY, col2, 0);
    inc1.addColumn(FAMILY, col3, 0);
    res = region.increment(inc1);
    assertEquals(3, res.size());
    assertEquals(1, Bytes.toLong(res.getValue(FAMILY, col1)));
    assertEquals(0, Bytes.toLong(res.getValue(FAMILY, col2)));
    assertEquals(0, Bytes.toLong(res.getValue(FAMILY, col3)));
    verifyHLogCount(wal, 1);

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    // 1 write back to WAL
    inc1 = new Increment(row1);
    inc1.addColumn(FAMILY, col1, 5);
    inc1.addColumn(FAMILY, col2, 4);
    inc1.addColumn(FAMILY, col3, 3);
    res = region.increment(inc1);
    assertEquals(3, res.size());
    assertEquals(6, Bytes.toLong(res.getValue(FAMILY, col1)));
    assertEquals(4, Bytes.toLong(res.getValue(FAMILY, col2)));
    assertEquals(3, Bytes.toLong(res.getValue(FAMILY, col3)));
    verifyHLogCount(wal, 2);

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    HRegion region = createHRegion(tableName, "increment", wal, false);


    // col1: amount = 1, 1 write back to WAL
    Increment inc1 = new Increment(row1);
    inc1.addColumn(FAMILY, col1, 1);
    Result res = region.increment(inc1);
    assertEquals(1, res.size());
    assertEquals(1, Bytes.toLong(res.getValue(FAMILY, col1)));
    verifyHLogCount(wal, 1);


    // col1: amount = 0, 0 write back to WAL

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    verifyHLogCount(wal, 1);


    // col1: amount = 0, 0 write back to WAL
    inc1 = new Increment(row1);
    inc1.addColumn(FAMILY, col1, 0);
    res = region.increment(inc1);
    assertEquals(1, res.size());
    assertEquals(1, Bytes.toLong(res.getValue(FAMILY, col1)));
    verifyHLogCount(wal, 1);


    // col1: amount = 0, col2: amount = 0, col3: amount = 0

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