org.apache.flink.table.runtime.operators.window.assigners

类 SlidingWindowAssigner

java.lang.Object

org.apache.flink.table.runtime.operators.window.assigners.WindowAssigner<W>

org.apache.flink.table.runtime.operators.window.assigners.PanedWindowAssigner<TimeWindow>

org.apache.flink.table.runtime.operators.window.assigners.SlidingWindowAssigner

所有已实现的接口:

Serializable, InternalTimeWindowAssigner

public class SlidingWindowAssigner
extends PanedWindowAssigner<TimeWindow>
implements InternalTimeWindowAssigner

A WindowAssigner that windows elements into sliding windows based on the timestamp of the elements. Windows can possibly overlap.

另请参阅:

序列化表格

构造器概要

构造器

限定符	构造器和说明
protected	SlidingWindowAssigner(long size, long slide, long offset, boolean isEventTime)

方法概要

限定符和类型	方法和说明
TimeWindow	assignPane(Object element, long timestamp) Given the timestamp and element, returns the pane into which it should be placed.
Collection<TimeWindow>	assignWindows(org.apache.flink.table.data.RowData element, long timestamp) Given the timestamp and element, returns the set of windows into which it should be placed.
TimeWindow	getLastWindow(TimeWindow pane) Gets the last window which the pane belongs to.
org.apache.flink.api.common.typeutils.TypeSerializer<TimeWindow>	getWindowSerializer(org.apache.flink.api.common.ExecutionConfig executionConfig) Returns a TypeSerializer for serializing windows that are assigned by this WindowAssigner.
boolean	isEventTime() Returns true if elements are assigned to windows based on event time, false otherwise.
static SlidingWindowAssigner	of(java.time.Duration size, java.time.Duration slide) Creates a new SlidingEventTimeWindows WindowAssigner that assigns elements to sliding time windows based on the element timestamp.
Iterable<TimeWindow>	splitIntoPanes(TimeWindow window) Splits the given window into panes collection.
String	toString()
SlidingWindowAssigner	withEventTime()
SlidingWindowAssigner	withOffset(java.time.Duration offset)
SlidingWindowAssigner	withProcessingTime()

从类继承的方法 org.apache.flink.table.runtime.operators.window.assigners.WindowAssigner

open

从类继承的方法 java.lang.Object

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

构造器详细资料

SlidingWindowAssigner

protected SlidingWindowAssigner(long size,
                                long slide,
                                long offset,
                                boolean isEventTime)

方法详细资料

assignWindows

public Collection<TimeWindow> assignWindows(org.apache.flink.table.data.RowData element,
                                            long timestamp)

从类复制的说明: WindowAssigner

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

指定者:

assignWindows 在类中 WindowAssigner<TimeWindow>

参数:

element - The element to which windows should be assigned.

timestamp - The timestamp of the element when WindowAssigner.isEventTime() returns true, or the current system time when WindowAssigner.isEventTime() returns false. The timestamp value is mapping to UTC milliseconds for splitting windows simply.

assignPane

public TimeWindow assignPane(Object element,
                             long timestamp)

从类复制的说明: PanedWindowAssigner

Given the timestamp and element, returns the pane into which it should be placed.

指定者:

assignPane 在类中 PanedWindowAssigner<TimeWindow>

参数:

element - The element to which windows should be assigned.

timestamp - The timestamp of the element when WindowAssigner.isEventTime() returns true, or the current system time when WindowAssigner.isEventTime() returns false.

splitIntoPanes

public Iterable<TimeWindow> splitIntoPanes(TimeWindow window)

从类复制的说明: PanedWindowAssigner

Splits the given window into panes collection.

指定者:

splitIntoPanes 在类中 PanedWindowAssigner<TimeWindow>

参数:

window - the window to be split.

返回:

the panes iterable

getLastWindow

public TimeWindow getLastWindow(TimeWindow pane)

从类复制的说明: PanedWindowAssigner

Gets the last window which the pane belongs to.

指定者:

getLastWindow 在类中 PanedWindowAssigner<TimeWindow>

getWindowSerializer

public org.apache.flink.api.common.typeutils.TypeSerializer<TimeWindow> getWindowSerializer(org.apache.flink.api.common.ExecutionConfig executionConfig)

从类复制的说明: WindowAssigner

Returns a TypeSerializer for serializing windows that are assigned by this WindowAssigner.

指定者:

getWindowSerializer 在类中 WindowAssigner<TimeWindow>

isEventTime

public boolean isEventTime()

从类复制的说明: WindowAssigner

Returns true if elements are assigned to windows based on event time, false otherwise.

指定者:

isEventTime 在类中 WindowAssigner<TimeWindow>

toString

public String toString()

指定者:

toString 在类中 WindowAssigner<TimeWindow>

of

public static SlidingWindowAssigner of(java.time.Duration size,
                                       java.time.Duration slide)

Creates a new SlidingEventTimeWindows WindowAssigner that assigns elements to sliding time windows based on the element timestamp.

参数:

size - The size of the generated windows.

slide - The slide interval of the generated windows.

返回:

The time policy.

withOffset

public SlidingWindowAssigner withOffset(java.time.Duration offset)

withEventTime

public SlidingWindowAssigner withEventTime()

指定者:

withEventTime 在接口中 InternalTimeWindowAssigner

返回:

an InternalTimeWindowAssigner which in event time mode.

withProcessingTime

public SlidingWindowAssigner withProcessingTime()

指定者:

withProcessingTime 在接口中 InternalTimeWindowAssigner

返回:

an InternalTimeWindowAssigner which in processing time mode.