Class GeneralReduceByKeyStreamlet<R,K,T>
- java.lang.Object
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- org.apache.heron.streamlet.impl.StreamletBaseImpl<R>
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- org.apache.heron.streamlet.impl.StreamletImpl<KeyValue<K,T>>
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- org.apache.heron.streamlet.impl.streamlets.GeneralReduceByKeyStreamlet<R,K,T>
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- All Implemented Interfaces:
Streamlet<KeyValue<K,T>>
,StreamletBase<KeyValue<K,T>>
public class GeneralReduceByKeyStreamlet<R,K,T> extends StreamletImpl<KeyValue<K,T>>
GeneralReduceByKeyStreamlet represents a KVStreamlet that is the result of applying user supplied reduceFn on all elements. GeneralReduceByKeyStreamlet's elements are of KeyValue type where the key is KeyWindowInfo<K> type and the value is of type T.
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.heron.streamlet.impl.StreamletBaseImpl
StreamletBaseImpl.StreamletNamePrefix
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Field Summary
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Fields inherited from class org.apache.heron.streamlet.impl.StreamletBaseImpl
name, nPartitions
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Constructor Summary
Constructors Constructor Description GeneralReduceByKeyStreamlet(StreamletImpl<R> parent, SerializableFunction<R,K> keyExtractor, T identity, SerializableBiFunction<T,R,? extends T> reduceFn)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
doBuild(TopologyBuilder bldr, Set<String> stageNames)
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Methods inherited from class org.apache.heron.streamlet.impl.StreamletImpl
applyOperator, applyOperator, clone, consume, countByKey, countByKeyAndWindow, filter, flatMap, getAvailableStreamIds, getStreamId, join, join, keyBy, keyBy, log, map, reduceByKey, reduceByKey, reduceByKeyAndWindow, reduceByKeyAndWindow, repartition, repartition, setName, setNumPartitions, split, toSink, transform, union, withStream
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Methods inherited from class org.apache.heron.streamlet.impl.StreamletBaseImpl
addChild, build, getChildren, getName, getNumPartitions, isBuilt, isFullyBuilt, setDefaultNameIfNone
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.apache.heron.streamlet.Streamlet
getName, getNumPartitions
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Constructor Detail
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GeneralReduceByKeyStreamlet
public GeneralReduceByKeyStreamlet(StreamletImpl<R> parent, SerializableFunction<R,K> keyExtractor, T identity, SerializableBiFunction<T,R,? extends T> reduceFn)
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Method Detail
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doBuild
public boolean doBuild(TopologyBuilder bldr, Set<String> stageNames)
- Specified by:
doBuild
in classStreamletBaseImpl<KeyValue<K,T>>
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