com.google.cloud.dataflow.sdk.transforms.windowing

Class BoundedWindow

java.lang.Object

com.google.cloud.dataflow.sdk.transforms.windowing.BoundedWindow

Direct Known Subclasses:

GlobalWindow, IntervalWindow

public abstract class BoundedWindow
extends Object

A BoundedWindow represents a finite grouping of elements, with an upper bound (larger timestamps represent more recent data) on the timestamps of elements that can be placed in the window. This finiteness means that for every window, at some point in time, all data for that window will have arrived and can be processed together.

Windows must also implement Object.equals(java.lang.Object) and Object.hashCode() such that windows that are logically equal will be treated as equal by equals() and hashCode().

Field Summary

Fields

Modifier and Type	Field and Description
static Instant	TIMESTAMP_MAX_VALUE
static Instant	TIMESTAMP_MIN_VALUE

Constructor Summary

Constructors

Constructor and Description
BoundedWindow()

Method Summary

Modifier and Type	Method and Description
abstract Instant	maxTimestamp() Returns the inclusive upper bound of timestamps for values in this window.

Methods inherited from class java.lang.Object

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

Field Detail

TIMESTAMP_MIN_VALUE

public static final Instant TIMESTAMP_MIN_VALUE

TIMESTAMP_MAX_VALUE

public static final Instant TIMESTAMP_MAX_VALUE

Constructor Detail

BoundedWindow

public BoundedWindow()

Method Detail

maxTimestamp

public abstract Instant maxTimestamp()

Returns the inclusive upper bound of timestamps for values in this window.