Examples of org.apache.hadoop.hbase.client.coprocessor.DoubleColumnInterpreter

Package org.apache.hadoop.hbase.client.coprocessor

Examples of org.apache.hadoop.hbase.client.coprocessor.DoubleColumnInterpreter

org.apache.hadoop.hbase.client.coprocessor.DoubleColumnInterpreter
a concrete column interpreter implementation. The cell value is a Double value and its promoted data type is also a Double value. For computing aggregation function, this class is used to find the datatype of the cell value. Client is supposed to instantiate it and passed along as a parameter. See TestDoubleColumnInterpreter methods for its sample usage. Its methods handle null arguments gracefully.

  public void testMedianWithValidRange() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    final ColumnInterpreter<Double, Double, EmptyMsg, DoubleMsg, DoubleMsg> ci = 
        new DoubleColumnInterpreter();
    double median = aClient.median(TEST_TABLE, ci, scan);
    assertEquals(8.00, median, 0.00);
  }

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  public void testMaxWithValidRange() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    final ColumnInterpreter<Double, Double, EmptyMsg, DoubleMsg, DoubleMsg> ci = 
        new DoubleColumnInterpreter();
    double maximum = aClient.max(TEST_TABLE, ci, scan);
    assertEquals(19.00, maximum, 0.00);
  }

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    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    scan.setStartRow(ROWS[5]);
    scan.setStopRow(ROWS[15]);
    final ColumnInterpreter<Double, Double, EmptyMsg, DoubleMsg, DoubleMsg> ci = 
        new DoubleColumnInterpreter();
    double max = aClient.max(TEST_TABLE, ci, scan);
    assertEquals(14.00, max, 0.00);
  }

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  public void testMaxWithValidRangeWithNoCQ() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    final ColumnInterpreter<Double, Double, EmptyMsg, DoubleMsg, DoubleMsg> ci = 
        new DoubleColumnInterpreter();
    double maximum = aClient.max(TEST_TABLE, ci, scan);
    assertEquals(19.00, maximum, 0.00);
  }

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    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    scan.setStartRow(ROWS[6]);
    scan.setStopRow(ROWS[7]);
    final ColumnInterpreter<Double, Double, EmptyMsg, DoubleMsg, DoubleMsg> ci = 
        new DoubleColumnInterpreter();
    double max = aClient.max(TEST_TABLE, ci, scan);
    assertEquals(6.00, max, 0.00);
  }

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  @Test(timeout = 300000)
  public void testMaxWithValidRangeWithNullCF() {
    AggregationClient aClient = new AggregationClient(conf);
    final ColumnInterpreter<Double, Double, EmptyMsg, DoubleMsg, DoubleMsg> ci = 
        new DoubleColumnInterpreter();
    Scan scan = new Scan();
    Double max = null;
    try {
      max = aClient.max(TEST_TABLE, ci, scan);
    } catch (Throwable e) {

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  @Test(timeout = 300000)
  public void testMaxWithInvalidRange() {
    AggregationClient aClient = new AggregationClient(conf);
    final ColumnInterpreter<Double, Double, EmptyMsg, DoubleMsg, DoubleMsg> ci = 
        new DoubleColumnInterpreter();
    Scan scan = new Scan();
    scan.setStartRow(ROWS[4]);
    scan.setStopRow(ROWS[2]);
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    double max = Double.MIN_VALUE;

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    scan.setStartRow(ROWS[4]);
    scan.setStopRow(ROWS[4]);
    try {
      AggregationClient aClient = new AggregationClient(conf);
      final ColumnInterpreter<Double, Double, EmptyMsg, DoubleMsg, DoubleMsg> ci = 
          new DoubleColumnInterpreter();
      max = aClient.max(TEST_TABLE, ci, scan);
    } catch (Exception e) {
      max = 0.00;
    }
    assertEquals(0.00, max, 0.00);// control should go to the catch block

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    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    Filter f = new PrefixFilter(Bytes.toBytes("foo:bar"));
    scan.setFilter(f);
    final ColumnInterpreter<Double, Double, EmptyMsg, DoubleMsg, DoubleMsg> ci = 
        new DoubleColumnInterpreter();
    max = aClient.max(TEST_TABLE, ci, scan);
    assertEquals(null, max);
  }

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    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    scan.setStartRow(HConstants.EMPTY_START_ROW);
    scan.setStopRow(HConstants.EMPTY_END_ROW);
    final ColumnInterpreter<Double, Double, EmptyMsg, DoubleMsg, DoubleMsg> ci = 
        new DoubleColumnInterpreter();
    double min = aClient.min(TEST_TABLE, ci, scan);
    assertEquals(0.00, min, 0.00);
  }

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Related Classes of org.apache.hadoop.hbase.client.coprocessor.DoubleColumnInterpreter

org.apache.hadoop.hbase.coprocessor.TestDoubleColumnInterpreter

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