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

Class PassThroughWindowFunction<K,W extends Window,T>

java.lang.Object

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

All Implemented Interfaces:

Serializable, Function, WindowFunction<T,T,K,W>

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

A WindowFunction that just emits each input element.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
PassThroughWindowFunction()

Method Summary

Modifier and Type	Method and Description
void	apply(K k, W window, Iterable<T> input, 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

PassThroughWindowFunction

public PassThroughWindowFunction()

Method Detail

apply

public void apply(K k,
                  W window,
                  Iterable<T> input,
                  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.