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 WritableComparable,V1 extends 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 WritableComparable,V1 extends Writable> |
This abstract class implements some common functionalities of the
the generic mapper, reducer and combiner classes of Aggregate.
|
ValueAggregatorMapper<K1 extends WritableComparable,V1 extends Writable> |
This class implements the generic mapper of Aggregate.
|
ValueAggregatorReducer<K1 extends WritableComparable,V1 extends 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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