com.google.cloud.dataflow.sdk.util

Class WindowingStrategy<T,W extends BoundedWindow>

java.lang.Object

com.google.cloud.dataflow.sdk.util.WindowingStrategy<T,W>

Type Parameters:

T - type of elements being windowed

W - BoundedWindow subclass used to represent the windows used by this WindowingStrategy

All Implemented Interfaces:

Serializable

public class WindowingStrategy<T,W extends BoundedWindow>
extends Object
implements Serializable

A WindowingStrategy describes the windowing behavior for a specific collection of values. It has both a WindowFn describing how elements are assigned to windows and a Trigger that controls when output is produced for each window.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	WindowingStrategy.AccumulationMode The accumulation modes that can be used with windowing.

Method Summary

Modifier and Type	Method and Description
org.joda.time.Duration	getAllowedLateness()
Window.ClosingBehavior	getClosingBehavior()
WindowingStrategy.AccumulationMode	getMode()
ExecutableTrigger<W>	getTrigger()
WindowFn<T,W>	getWindowFn()
static WindowingStrategy<Object,GlobalWindow>	globalDefault() Return a fully specified, default windowing strategy.
boolean	isAllowedLatenessSpecified()
boolean	isModeSpecified()
boolean	isTriggerSpecified()
static <T,W extends BoundedWindow> WindowingStrategy<T,W>	of(WindowFn<T,W> windowFn)
String	toString()
WindowingStrategy<T,W>	withAllowedLateness(org.joda.time.Duration allowedLateness) Returns a WindowingStrategy identical to this but with the allowed lateness set to allowedLateness.
WindowingStrategy<T,W>	withClosingBehavior(Window.ClosingBehavior closingBehavior)
WindowingStrategy<T,W>	withMode(WindowingStrategy.AccumulationMode mode) Returns a WindowingStrategy identical to this but with the accumulation mode set to mode.
WindowingStrategy<T,W>	withTrigger(Trigger<?> wildcardTrigger) Returns a WindowingStrategy identical to this but with the trigger set to wildcardTrigger.
WindowingStrategy<T,W>	withWindowFn(WindowFn<?,?> wildcardWindowFn) Returns a WindowingStrategy identical to this but with the window function set to wildcardWindowFn.

Methods inherited from class java.lang.Object

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

Method Detail

globalDefault

public static WindowingStrategy<Object,GlobalWindow> globalDefault()

Return a fully specified, default windowing strategy.

of

public static <T,W extends BoundedWindow> WindowingStrategy<T,W> of(WindowFn<T,W> windowFn)

getWindowFn

public WindowFn<T,W> getWindowFn()

getTrigger

public ExecutableTrigger<W> getTrigger()

isTriggerSpecified

public boolean isTriggerSpecified()

getAllowedLateness

public org.joda.time.Duration getAllowedLateness()

isAllowedLatenessSpecified

public boolean isAllowedLatenessSpecified()

getMode

public WindowingStrategy.AccumulationMode getMode()

isModeSpecified

public boolean isModeSpecified()

getClosingBehavior

public Window.ClosingBehavior getClosingBehavior()

withTrigger

public WindowingStrategy<T,W> withTrigger(Trigger<?> wildcardTrigger)

Returns a WindowingStrategy identical to this but with the trigger set to wildcardTrigger.

withMode

public WindowingStrategy<T,W> withMode(WindowingStrategy.AccumulationMode mode)

Returns a WindowingStrategy identical to this but with the accumulation mode set to mode.

withWindowFn

public WindowingStrategy<T,W> withWindowFn(WindowFn<?,?> wildcardWindowFn)

Returns a WindowingStrategy identical to this but with the window function set to wildcardWindowFn.

withAllowedLateness

public WindowingStrategy<T,W> withAllowedLateness(org.joda.time.Duration allowedLateness)

Returns a WindowingStrategy identical to this but with the allowed lateness set to allowedLateness.

withClosingBehavior

public WindowingStrategy<T,W> withClosingBehavior(Window.ClosingBehavior closingBehavior)

toString

public String toString()

Overrides:

toString in class Object