Package org.apache.beam.sdk.transforms.windowing

Class GlobalWindows

java.lang.Object

org.apache.beam.sdk.transforms.windowing.WindowFn<Object,GlobalWindow>

org.apache.beam.sdk.transforms.windowing.NonMergingWindowFn<Object,GlobalWindow>

org.apache.beam.sdk.transforms.windowing.GlobalWindows

All Implemented Interfaces:

Serializable, HasDisplayData

public class GlobalWindows
extends NonMergingWindowFn<Object,GlobalWindow>

A WindowFn that assigns all data to the same window.

This is the WindowFn used for data coming from a source, before a Window transform has been applied.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.beam.sdk.transforms.windowing.WindowFn

WindowFn.AssignContext, WindowFn.MergeContext

Constructor Summary

Constructors

Constructor	Description
GlobalWindows()

Method Summary

Modifier and Type	Method	Description
boolean	assignsToOneWindow()	Returns true if this WindowFn always assigns an element to exactly one window.
Collection<GlobalWindow>	assignWindows(WindowFn<Object,GlobalWindow>.AssignContext c)	Given a timestamp and element, returns the set of windows into which it should be placed.
boolean	equals(@Nullable Object other)
WindowMappingFn<GlobalWindow>	getDefaultWindowMappingFn()	Returns the default WindowMappingFn to use to map main input windows to side input windows.
int	hashCode()
boolean	isCompatible(WindowFn<?,?> o)	Returns whether this performs the same merging as the given WindowFn.
String	toString()
void	verifyCompatibility(WindowFn<?,?> other)	Throw IncompatibleWindowException if this WindowFn does not perform the same merging as the given $WindowFn.
Coder<GlobalWindow>	windowCoder()	Returns the Coder used for serializing the windows used by this windowFn.

Methods inherited from class org.apache.beam.sdk.transforms.windowing.NonMergingWindowFn

isNonMerging, mergeWindows

Methods inherited from class org.apache.beam.sdk.transforms.windowing.WindowFn

getWindowTypeDescriptor, populateDisplayData

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

GlobalWindows

public GlobalWindows()

Method Details

assignWindows

public Collection<GlobalWindow> assignWindows(WindowFn<Object,GlobalWindow>.AssignContext c)

Description copied from class: WindowFn

Given a timestamp and element, returns the set of windows into which it should be placed.

Specified by:

assignWindows in class WindowFn<Object,GlobalWindow>

isCompatible

public boolean isCompatible(WindowFn<?,?> o)

Description copied from class: WindowFn

Returns whether this performs the same merging as the given WindowFn.

Specified by:

isCompatible in class WindowFn<Object,GlobalWindow>

verifyCompatibility

public void verifyCompatibility(WindowFn<?,?> other)
                         throws IncompatibleWindowException

Description copied from class: WindowFn

Throw IncompatibleWindowException if this WindowFn does not perform the same merging as the given $WindowFn.

Overrides:

verifyCompatibility in class WindowFn<Object,GlobalWindow>

Throws:

IncompatibleWindowException - if compared WindowFns are not compatible.

windowCoder

public Coder<GlobalWindow> windowCoder()

Description copied from class: WindowFn

Returns the Coder used for serializing the windows used by this windowFn.

Specified by:

windowCoder in class WindowFn<Object,GlobalWindow>

getDefaultWindowMappingFn

public WindowMappingFn<GlobalWindow> getDefaultWindowMappingFn()

Description copied from class: WindowFn

Returns the default WindowMappingFn to use to map main input windows to side input windows. This should accept arbitrary main input windows, and produce a BoundedWindow that can be produced by this WindowFn.

Specified by:

getDefaultWindowMappingFn in class WindowFn<Object,GlobalWindow>

assignsToOneWindow

public boolean assignsToOneWindow()

Description copied from class: WindowFn

Returns true if this WindowFn always assigns an element to exactly one window.

If this varies per-element, or cannot be determined, conservatively return false.

By default, returns false.

Overrides:

assignsToOneWindow in class WindowFn<Object,GlobalWindow>

equals

public boolean equals(@Nullable Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object