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

类 CumulativeWindowAssigner

java.lang.Object

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

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

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

所有已实现的接口:

Serializable, InternalTimeWindowAssigner

public class CumulativeWindowAssigner
extends PanedWindowAssigner<TimeWindow>
implements InternalTimeWindowAssigner

A GroupWindowAssigner that windows elements into cumulative windows based on the timestamp of the elements. Windows are 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	CumulativeWindowAssigner(long maxSize, long step, 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 CumulativeWindowAssigner	of(Duration maxSize, Duration step) Creates a new CumulativeWindowAssigner that assigns elements to cumulative time windows based on the element timestamp.
Iterable<TimeWindow>	splitIntoPanes(TimeWindow window) Splits the given window into panes collection.
String	toString()
CumulativeWindowAssigner	withEventTime()
CumulativeWindowAssigner	withOffset(Duration offset)
CumulativeWindowAssigner	withProcessingTime()

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

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

CumulativeWindowAssigner

protected CumulativeWindowAssigner(long maxSize,
                                   long step,
                                   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: GroupWindowAssigner

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

指定者:

assignWindows 在类中 GroupWindowAssigner<TimeWindow>

参数:

element - The element to which windows should be assigned.

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

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

指定者:

getWindowSerializer 在类中 GroupWindowAssigner<TimeWindow>

isEventTime

public boolean isEventTime()

从类复制的说明: GroupWindowAssigner

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

指定者:

isEventTime 在类中 GroupWindowAssigner<TimeWindow>

toString

public String toString()

指定者:

toString 在类中 GroupWindowAssigner<TimeWindow>

of

public static CumulativeWindowAssigner of(Duration maxSize,
                                          Duration step)

Creates a new CumulativeWindowAssigner that assigns elements to cumulative time windows based on the element timestamp.

参数:

maxSize - The max size of the generated windows.

step - The step interval for window size to increase of the generated windows.

返回:

The time policy.

withOffset

public CumulativeWindowAssigner withOffset(Duration offset)

withEventTime

public CumulativeWindowAssigner withEventTime()

指定者:

withEventTime 在接口中 InternalTimeWindowAssigner

返回:

an InternalTimeWindowAssigner which in event time mode.

withProcessingTime

public CumulativeWindowAssigner withProcessingTime()

指定者:

withProcessingTime 在接口中 InternalTimeWindowAssigner

返回:

an InternalTimeWindowAssigner which in processing time mode.