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

类 CountTumblingWindowAssigner

java.lang.Object

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

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

所有已实现的接口:

Serializable

public class CountTumblingWindowAssigner
extends GroupWindowAssigner<CountWindow>

A GroupWindowAssigner that windows elements into fixed-size windows based on the count number of the elements. Windows cannot 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 CountTumblingWindowAssigner	of(long size)
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: GroupWindowAssigner

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

覆盖:

open 在类中 GroupWindowAssigner<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: 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<CountWindow>

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.

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: GroupWindowAssigner

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

指定者:

getWindowSerializer 在类中 GroupWindowAssigner<CountWindow>

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<CountWindow>

toString

public String toString()

指定者:

toString 在类中 GroupWindowAssigner<CountWindow>

of

public static CountTumblingWindowAssigner of(long size)