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

类 CountSlidingWindowAssigner

java.lang.Object

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

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

所有已实现的接口:

Serializable

public class CountSlidingWindowAssigner
extends WindowAssigner<CountWindow>

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

另请参阅:

序列化表格

方法概要

限定符和类型	方法和说明
Collection<CountWindow>	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.
org.apache.flink.api.common.typeutils.TypeSerializer<CountWindow>	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 CountSlidingWindowAssigner	of(long windowSize, long windowSlide)
void	open(InternalWindowProcessFunction.Context<?,CountWindow> ctx) Initialization method for the function.
String	toString()

从类继承的方法 java.lang.Object

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

方法详细资料

open

public void open(InternalWindowProcessFunction.Context<?,CountWindow> ctx)
          throws Exception

从类复制的说明: WindowAssigner

Initialization method for the function. It is called before the actual working methods.

覆盖:

open 在类中 WindowAssigner<CountWindow>

抛出:

Exception

assignWindows

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

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<CountWindow>

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.

抛出:

IOException

getWindowSerializer

public org.apache.flink.api.common.typeutils.TypeSerializer<CountWindow> 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<CountWindow>

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<CountWindow>

toString

public String toString()

指定者:

toString 在类中 WindowAssigner<CountWindow>

of

public static CountSlidingWindowAssigner of(long windowSize,
                                            long windowSlide)