org.apache.flink.streaming.api.windowing.windowbuffer

Class TumblingGroupedPreReducer<T>

java.lang.Object

org.apache.flink.streaming.api.windowing.windowbuffer.WindowBuffer<T>

org.apache.flink.streaming.api.windowing.windowbuffer.TumblingGroupedPreReducer<T>

All Implemented Interfaces:

Serializable, Cloneable, PreAggregator

Direct Known Subclasses:

JumpingCountGroupedPreReducer, JumpingTimeGroupedPreReducer

public class TumblingGroupedPreReducer<T>
extends WindowBuffer<T>
implements PreAggregator

Grouped pre-reducer for tumbling eviction polciy.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.flink.streaming.api.windowing.windowbuffer.WindowBuffer

emitEmpty, emitPerGroup, nextID, sequentialID

Constructor Summary

Constructors

Constructor and Description
TumblingGroupedPreReducer(org.apache.flink.api.common.functions.ReduceFunction<T> reducer, org.apache.flink.api.java.functions.KeySelector<T,?> keySelector, org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer)
TumblingGroupedPreReducer(org.apache.flink.api.common.functions.ReduceFunction<T> reducer, org.apache.flink.api.java.functions.KeySelector<T,?> keySelector, org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer, boolean evict)

Method Summary

Modifier and Type	Method and Description
TumblingGroupedPreReducer<T>	clone()
void	emitWindow(org.apache.flink.util.Collector<StreamWindow<T>> collector)
void	evict(int n)
TumblingGroupedPreReducer<T>	noEvict()
void	store(T element)
String	toString()

Methods inherited from class org.apache.flink.streaming.api.windowing.windowbuffer.WindowBuffer

createEmptyWindow, emitEmpty, sequentialID

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TumblingGroupedPreReducer

public TumblingGroupedPreReducer(org.apache.flink.api.common.functions.ReduceFunction<T> reducer,
                                 org.apache.flink.api.java.functions.KeySelector<T,?> keySelector,
                                 org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer)

TumblingGroupedPreReducer

public TumblingGroupedPreReducer(org.apache.flink.api.common.functions.ReduceFunction<T> reducer,
                                 org.apache.flink.api.java.functions.KeySelector<T,?> keySelector,
                                 org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer,
                                 boolean evict)

Method Detail

emitWindow

public void emitWindow(org.apache.flink.util.Collector<StreamWindow<T>> collector)

Specified by:

emitWindow in class WindowBuffer<T>

store

public void store(T element)
           throws Exception

Specified by:

store in class WindowBuffer<T>

Throws:

Exception

evict

public void evict(int n)

Specified by:

evict in class WindowBuffer<T>

clone

public TumblingGroupedPreReducer<T> clone()

Specified by:

clone in class WindowBuffer<T>

toString

public String toString()

Overrides:

toString in class Object

noEvict

public TumblingGroupedPreReducer<T> noEvict()