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

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

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

org.apache.hadoop.hbase.client.coprocessor.LongColumnInterpreter
a concrete column interpreter implementation. The cell value is a Long value and its promoted data type is also a Long 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 TestAggregateProtocol methods for its sample usage. Its methods handle null arguments gracefully.

  @Test
  public void testSumWithValidRangeWithNoCQ() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long sum = aClient.sum(TEST_TABLE, ci,
        scan);
    assertEquals(190 + 1900, sum);
  }

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    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    scan.setStartRow(ROWS[6]);
    scan.setStopRow(ROWS[7]);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long sum = aClient.sum(TEST_TABLE, ci, scan);
    assertEquals(6 + 60, sum);
  }

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  public void testSumWithValidRangeWithNullCF() {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.setStartRow(ROWS[6]);
    scan.setStopRow(ROWS[7]);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    Long sum = null;
    try {
      sum = aClient.sum(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
    }

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    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    scan.setStartRow(ROWS[6]);
    scan.setStopRow(ROWS[2]);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    Long sum = null;
    try {
      sum = aClient.sum(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
    }

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    AggregationClient aClient = new AggregationClient(conf);
    Filter f = new PrefixFilter(Bytes.toBytes("foo:bar"));
    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    scan.setFilter(f);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    Long sum = null;
    sum = aClient.sum(TEST_TABLE, ci, scan);
    assertEquals(null, sum);
  }

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  @Test
  public void testAvgWithValidRange() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY,TEST_QUALIFIER);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    double avg = aClient.avg(TEST_TABLE, ci,
        scan);
    assertEquals(9.5, avg, 0);
  }

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    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY,TEST_QUALIFIER);
    scan.setStartRow(ROWS[5]);
    scan.setStopRow(ROWS[15]);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    double avg = aClient.avg(TEST_TABLE, ci, scan);
    assertEquals(9.5, avg, 0);
  }

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  @Test
  public void testAvgWithValidRangeWithNoCQ() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    double avg = aClient.avg(TEST_TABLE, ci,
        scan);
    assertEquals(104.5, avg, 0);
  }

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    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    scan.setStartRow(ROWS[6]);
    scan.setStopRow(ROWS[7]);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    double avg = aClient.avg(TEST_TABLE, ci, scan);
    assertEquals(6 + 60, avg, 0);
  }

View Full Code Here


  @Test
  public void testAvgWithValidRangeWithNullCF() {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    Double avg = null;
    try {
      avg = aClient.avg(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
    }

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