Package org.apache.beam.sdk.extensions.sql.impl

Class TVFSlidingWindowFn

java.lang.Object

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

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

org.apache.beam.sdk.extensions.sql.impl.TVFSlidingWindowFn

All Implemented Interfaces:

Serializable, HasDisplayData

public abstract class TVFSlidingWindowFn
extends NonMergingWindowFn<Object,IntervalWindow>

TVFSlidingWindowFn assigns window based on input row's "window_start" and "window_end" timestamps.

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
TVFSlidingWindowFn()

Method Summary

Modifier and Type	Method	Description
Collection<IntervalWindow>	assignWindows(WindowFn<Object,IntervalWindow>.AssignContext c)	Given a timestamp and element, returns the set of windows into which it should be placed.
WindowMappingFn<IntervalWindow>	getDefaultWindowMappingFn()	Returns the default WindowMappingFn to use to map main input windows to side input windows.
abstract Duration	getPeriod()	Amount of time between generated windows.
abstract Duration	getSize()	Size of the generated windows.
boolean	isCompatible(WindowFn<?,?> other)	Returns whether this performs the same merging as the given WindowFn.
static TVFSlidingWindowFn	of(Duration size, Duration period)
Coder<IntervalWindow>	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

assignsToOneWindow, getWindowTypeDescriptor, populateDisplayData, verifyCompatibility

Methods inherited from class java.lang.Object

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

Constructor Details

TVFSlidingWindowFn

public TVFSlidingWindowFn()

Method Details

getSize

public abstract Duration getSize()

Size of the generated windows.

getPeriod

public abstract Duration getPeriod()

Amount of time between generated windows.

of

public static TVFSlidingWindowFn of(Duration size,
 Duration period)

assignWindows

public Collection<IntervalWindow> assignWindows(WindowFn<Object,IntervalWindow>.AssignContext c)
                                         throws Exception

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,IntervalWindow>

Throws:

Exception

isCompatible

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

Description copied from class: WindowFn

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

Specified by:

isCompatible in class WindowFn<Object,IntervalWindow>

windowCoder

public Coder<IntervalWindow> 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,IntervalWindow>

getDefaultWindowMappingFn

public WindowMappingFn<IntervalWindow> 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,IntervalWindow>