org.apache.flink.streaming.api.functions.windowing

Class ReduceIterableWindowFunction<K,W extends Window,T>

java.lang.Object

org.apache.flink.streaming.api.functions.windowing.ReduceIterableWindowFunction<K,W,T>

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, WindowFunction<T,T,K,W>

@Internal
public class ReduceIterableWindowFunction<K,W extends Window,T>
extends Object
implements WindowFunction<T,T,K,W>

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ReduceIterableWindowFunction(org.apache.flink.api.common.functions.ReduceFunction<T> reduceFunction)

Method Summary

Modifier and Type	Method and Description
void	apply(K k, W window, Iterable<T> input, org.apache.flink.util.Collector<T> out) Evaluates the window and outputs none or several elements.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReduceIterableWindowFunction

public ReduceIterableWindowFunction(org.apache.flink.api.common.functions.ReduceFunction<T> reduceFunction)

Method Detail

apply

public void apply(K k,
                  W window,
                  Iterable<T> input,
                  org.apache.flink.util.Collector<T> out)
           throws Exception

Description copied from interface: WindowFunction

Evaluates the window and outputs none or several elements.

Specified by:

apply in interface WindowFunction<T,T,K,W extends Window>

Parameters:

k - The key for which this window is evaluated.

window - The window that is being evaluated.

input - The elements in the window being evaluated.

out - A collector for emitting elements.

Throws:

Exception - The function may throw exceptions to fail the program and trigger recovery.