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

Class ReduceAllWindowFunction<W extends Window,T>

java.lang.Object

org.apache.flink.api.common.functions.AbstractRichFunction

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

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

All Implemented Interfaces:

Serializable, Function, RichFunction, AllWindowFunction<T,T,W>

public class ReduceAllWindowFunction<W extends Window,T>
extends RichAllWindowFunction<T,T,W>

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ReduceAllWindowFunction(ReduceFunction<T> reduceFunction)

Method Summary

Methods

Modifier and Type	Method and Description
void	apply(W window, Iterable<T> values, Collector<T> out) Evaluates the window and outputs none or several elements.
void	close()
void	open(Configuration parameters)
void	setRuntimeContext(RuntimeContext ctx)

Methods inherited from class org.apache.flink.api.common.functions.AbstractRichFunction

getIterationRuntimeContext, getRuntimeContext

Methods inherited from class java.lang.Object

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

Constructor Detail

ReduceAllWindowFunction

public ReduceAllWindowFunction(ReduceFunction<T> reduceFunction)

Method Detail

setRuntimeContext

public void setRuntimeContext(RuntimeContext ctx)

Specified by:

setRuntimeContext in interface RichFunction

Overrides:

setRuntimeContext in class AbstractRichFunction

open

public void open(Configuration parameters)
          throws Exception

Specified by:

open in interface RichFunction

Overrides:

open in class AbstractRichFunction

Throws:

Exception

close

public void close()
           throws Exception

Specified by:

close in interface RichFunction

Overrides:

close in class AbstractRichFunction

Throws:

Exception

apply

public void apply(W window,
         Iterable<T> values,
         Collector<T> out)
           throws Exception

Description copied from interface: AllWindowFunction

Evaluates the window and outputs none or several elements.

Parameters:

window - The window that is being evaluated.

values - 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.