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

Class ProcessAllWindowFunction.Context

java.lang.Object

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

Direct Known Subclasses:

InternalProcessAllWindowContext, InternalProcessApplyAllWindowContext

Enclosing class:

ProcessAllWindowFunction<IN,OUT,W extends Window>

public abstract class ProcessAllWindowFunction.Context
extends Object

The context holding window metadata.

Constructor Summary

Constructors

Constructor and Description
Context()

Method Summary

Modifier and Type	Method and Description
abstract KeyedStateStore	globalState() State accessor for per-key global state.
abstract <X> void	output(OutputTag<X> outputTag, X value) Emits a record to the side output identified by the OutputTag.
abstract W	window()
abstract KeyedStateStore	windowState() State accessor for per-key and per-window state.

Methods inherited from class java.lang.Object

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

Constructor Detail

Context

public Context()

Method Detail

window

public abstract W window()

Returns:

The window that is being evaluated.

windowState

public abstract KeyedStateStore windowState()

State accessor for per-key and per-window state.

NOTE:If you use per-window state you have to ensure that you clean it up by implementing ProcessWindowFunction.clear(ProcessWindowFunction.Context).

globalState

public abstract KeyedStateStore globalState()

State accessor for per-key global state.

output

public abstract <X> void output(OutputTag<X> outputTag,
                                X value)

Emits a record to the side output identified by the OutputTag.

Parameters:

outputTag - the OutputTag that identifies the side output to emit to.

value - The record to emit.