org.apache.flink.streaming.api.scala.function.util

Class ScalaWindowFunction<IN,OUT,KEY,W extends Window>

java.lang.Object

org.apache.flink.streaming.api.scala.function.util.ScalaWindowFunction<IN,OUT,KEY,W>

All Implemented Interfaces:

Serializable, Function, WindowFunction<IN,OUT,KEY,W>

public final class ScalaWindowFunction<IN,OUT,KEY,W extends Window>
extends Object
implements WindowFunction<IN,OUT,KEY,W>

A wrapper function that exposes a Scala Function4 as a Java WindowFunction.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ScalaWindowFunction(scala.Function4<KEY,W,scala.collection.Iterable<IN>,Collector<OUT>,scala.runtime.BoxedUnit> function)

Method Summary

Modifier and Type	Method and Description
void	apply(KEY key, W window, Iterable<IN> input, Collector<OUT> 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

ScalaWindowFunction

public ScalaWindowFunction(scala.Function4<KEY,W,scala.collection.Iterable<IN>,Collector<OUT>,scala.runtime.BoxedUnit> function)

Method Detail

apply

public void apply(KEY key,
                  W window,
                  Iterable<IN> input,
                  Collector<OUT> out)

Description copied from interface: WindowFunction

Evaluates the window and outputs none or several elements.

Specified by:

apply in interface WindowFunction<IN,OUT,KEY,W extends Window>

Parameters:

key - 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.