| Interface | Description |
|---|---|
| ValueAggregator<E> |
This interface defines the minimal protocol for value aggregators.
|
| ValueAggregatorDescriptor |
This interface defines the contract a value aggregator descriptor must
support.
|
| Class | Description |
|---|---|
| DoubleValueSum |
This class implements a value aggregator that sums up a sequence of double
values.
|
| LongValueMax |
This class implements a value aggregator that maintain the maximum of
a sequence of long values.
|
| LongValueMin |
This class implements a value aggregator that maintain the minimum of
a sequence of long values.
|
| LongValueSum |
This class implements a value aggregator that sums up
a sequence of long values.
|
| StringValueMax |
This class implements a value aggregator that maintain the biggest of
a sequence of strings.
|
| StringValueMin |
This class implements a value aggregator that maintain the smallest of
a sequence of strings.
|
| UniqValueCount |
This class implements a value aggregator that dedupes a sequence of objects.
|
| UserDefinedValueAggregatorDescriptor |
This class implements a wrapper for a user defined value aggregator
descriptor.
|
| ValueAggregatorBaseDescriptor |
This class implements the common functionalities of
the subclasses of ValueAggregatorDescriptor class.
|
| ValueAggregatorCombiner<K1 extends org.apache.hadoop.io.WritableComparable,V1 extends org.apache.hadoop.io.Writable> |
This class implements the generic combiner of Aggregate.
|
| ValueAggregatorJob |
This is the main class for creating a map/reduce job using Aggregate
framework.
|
| ValueAggregatorJobBase<K1 extends org.apache.hadoop.io.WritableComparable,V1 extends org.apache.hadoop.io.Writable> |
This abstract class implements some common functionalities of the
the generic mapper, reducer and combiner classes of Aggregate.
|
| ValueAggregatorMapper<K1 extends org.apache.hadoop.io.WritableComparable,V1 extends org.apache.hadoop.io.Writable> |
This class implements the generic mapper of Aggregate.
|
| ValueAggregatorReducer<K1 extends org.apache.hadoop.io.WritableComparable,V1 extends org.apache.hadoop.io.Writable> |
This class implements the generic reducer of Aggregate.
|
| ValueHistogram |
This class implements a value aggregator that computes the
histogram of a sequence of strings.
|
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