Examples of org.hbase.async.KeyValue

org.hbase.async.KeyValue
A "cell" in an HBase table.
This represents one unit of HBase data, one "record".
A note {@code byte} arrays
This class will never copy any {@code byte[]} that's given to it, neitherwill it create a copy before returning one to you. Changing a byte array get from or pass to this class will have unpredictable consequences. In particular, multiple {@link KeyValue} instances may share the same byte arrays, so changingone instance may also unexpectedly affect others.

    final byte[] qual2 = { 0x00, 0x27 };
    final byte[] val2 = Bytes.fromLong(5L);
    final byte[] qual12 = MockBase.concatByteArrays(qual1, qual2);
    
    final Span span = new Span(tsdb);
    span.addRow(new KeyValue(HOUR1, FAMILY, qual12, 
        MockBase.concatByteArrays(val1, val2, ZERO)));
    span.addRow(new KeyValue(HOUR2, FAMILY, qual12, 
        MockBase.concatByteArrays(val1, val2, ZERO)));
    span.addRow(new KeyValue(HOUR3, FAMILY, qual12, 
        MockBase.concatByteArrays(val1, val2, ZERO)));
    
    assertEquals(6, span.size());
    assertEquals(1356998400000L, span.timestamp(0));
    assertEquals(1356998402000L, span.timestamp(1));

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      System.arraycopy(Bytes.fromShort(qualifier), 0, qualifiers, i * 2, 2);
      System.arraycopy(Bytes.fromLong(i), 0, values, i * 8, 8);
    }
    
    final Span span = new Span(tsdb);
    span.addRow(new KeyValue(HOUR1, FAMILY, qualifiers, values));
    span.addRow(new KeyValue(HOUR2, FAMILY, qualifiers, values));
    span.addRow(new KeyValue(HOUR3, FAMILY, qualifiers, values));
    
    assertEquals(3600 * 3, span.size());
  }

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    final byte[] qual2 = { (byte) 0xF0, 0x00, 0x02, 0x07 };
    final byte[] val2 = Bytes.fromLong(5L);
    final byte[] qual12 = MockBase.concatByteArrays(qual1, qual2);
    
    final Span span = new Span(tsdb);
    span.addRow(new KeyValue(HOUR1, FAMILY, qual12, 
        MockBase.concatByteArrays(val1, val2, ZERO)));
    span.addRow(new KeyValue(HOUR2, FAMILY, qual12, 
        MockBase.concatByteArrays(val1, val2, ZERO)));
    span.addRow(new KeyValue(HOUR3, FAMILY, qual12, 
        MockBase.concatByteArrays(val1, val2, ZERO)));
    
    assertEquals(6, span.size());
    assertEquals(1356998400000L, span.timestamp(0));
    assertEquals(1356998400008L, span.timestamp(1));

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    final byte[] qual2 = { 0x00, 0x27 };
    final byte[] val2 = Bytes.fromLong(5L);
    final byte[] qual12 = MockBase.concatByteArrays(qual1, qual2);
    
    final Span span = new Span(tsdb);
    span.addRow(new KeyValue(HOUR1, FAMILY, qual12, 
        MockBase.concatByteArrays(val1, val2, ZERO)));
    span.addRow(new KeyValue(HOUR2, FAMILY, qual12, 
        MockBase.concatByteArrays(val1, val2, ZERO)));
    span.addRow(new KeyValue(HOUR3, FAMILY, qual12, 
        MockBase.concatByteArrays(val1, val2, ZERO)));


    assertEquals(6, span.size());
    final SeekableView it = span.iterator();
    DataPoint dp = it.next();

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    final byte[] val1 = Bytes.fromLong(4L);
    final byte[] qual2 = { 0x00, 0x27 };
    final byte[] val2 = Bytes.fromLong(5L);
    final byte[] qual12 = MockBase.concatByteArrays(qual1, qual2);
    
    final KeyValue kv = new KeyValue(HOUR1, FAMILY, qual12, 
        MockBase.concatByteArrays(val1, val2, ZERO));
    
    assertEquals(1356998402L, Span.lastTimestampInRow((short) 3, kv));
  }

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    final byte[] val1 = Bytes.fromLong(4L);
    final byte[] qual2 = { (byte) 0xF0, 0x00, 0x02, 0x07 };
    final byte[] val2 = Bytes.fromLong(5L);
    final byte[] qual12 = MockBase.concatByteArrays(qual1, qual2);
    
    final KeyValue kv = new KeyValue(HOUR1, FAMILY, qual12, 
        MockBase.concatByteArrays(val1, val2, ZERO));
    
    assertEquals(1356998400008L, Span.lastTimestampInRow((short) 3, kv));
  }

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        TSMeta.COUNTER_QUALIFIER());
  }


  @Test
  public void parseFromColumn() throws Exception {
    final KeyValue column = mock(KeyValue.class);
    when(column.key()).thenReturn(new byte[] { 0, 0, 1, 0, 0, 1, 0, 0, 1 });
    when(column.value()).thenReturn(storage.getColumn(
        new byte[] { 0, 0, 1, 0, 0, 1, 0, 0, 1 }, 
            NAME_FAMILY,
            "ts_meta".getBytes(MockBase.ASCII())));
    final TSMeta meta = TSMeta.parseFromColumn(tsdb, column, false)
      .joinUninterruptibly();

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    assertNull(meta.getMetric());
  }
  
  @Test
  public void parseFromColumnWithUIDMeta() throws Exception {
    final KeyValue column = mock(KeyValue.class);
    when(column.key()).thenReturn(new byte[] { 0, 0, 1, 0, 0, 1, 0, 0, 1 });
    when(column.value()).thenReturn(storage.getColumn(
        new byte[] { 0, 0, 1, 0, 0, 1, 0, 0, 1 }, 
            NAME_FAMILY,
            "ts_meta".getBytes(MockBase.ASCII())));
    final TSMeta meta = TSMeta.parseFromColumn(tsdb, column, true)
      .joinUninterruptibly();

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        }
        throw (Exception)ex;
      }      
    }
    
    final KeyValue column = mock(KeyValue.class);
    when(column.key()).thenReturn(new byte[] { 0, 0, 1, 0, 0, 1, 0, 0, 2 });
    when(column.value()).thenReturn(("{\"tsuid\":\"000001000001000002\",\"" +
        "description\":\"Description\",\"notes\":\"Notes\",\"created\":1328140800," +
        "\"custom\":null,\"units\":\"\",\"retention\":42,\"max\":1.0,\"min\":" +
        "\"NaN\",\"displayName\":\"Display\",\"dataType\":\"Data\"}")
        .getBytes(MockBase.ASCII()));
    TSMeta.parseFromColumn(tsdb, column, true).addErrback(new ErrBack())

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    ArrayList<Deferred<Boolean>> workers
      = new ArrayList<Deferred<Boolean>>();
    while ((rows = scanner.nextRows(1).joinUninterruptibly()) != null) {
      LOG.info("received a page of users.");
      for (ArrayList<KeyValue> row : rows) {
        KeyValue kv = row.get(0);
        byte[] expected = kv.value();
        String userId = new String(kv.key());
        PutRequest put = new PutRequest(
            TABLE_NAME, kv.key(), kv.family(),
            kv.qualifier(), mkNewPassword(expected));
        Deferred<Boolean> d = client.compareAndSet(put, expected)
          .addCallback(new InterpretResponse(userId))
          .addCallbacks(new ResultToMessage(), new FailureToMessage())
          .addCallback(new SendMessage());
        workers.add(d);

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Examples of org.hbase.async.KeyValue

A note {@code byte} arrays

Related Classes of org.hbase.async.KeyValue