org.apache.flink.table.runtime.operators.window.tvf.unslicing

类 UnsliceAssigners.SessionUnsliceAssigner

java.lang.Object

org.apache.flink.table.runtime.operators.window.tvf.unslicing.UnsliceAssigners.SessionUnsliceAssigner

所有已实现的接口:

Serializable, WindowAssigner, UnsliceAssigner<TimeWindow>

封闭类:

UnsliceAssigners

public static class UnsliceAssigners.SessionUnsliceAssigner
extends Object
implements UnsliceAssigner<TimeWindow>

The UnsliceAssigner for session windows.

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
SessionUnsliceAssigner(int rowtimeIndex, ZoneId shiftTimeZone, long sessionGap)

方法概要

限定符和类型	方法和说明
Optional<TimeWindow>	assignActualWindow(org.apache.flink.table.data.RowData element, ClockService clock, MergingWindowProcessFunction<?,TimeWindow> windowFunction) Returns the Window that the given element should belong to be used to trigger on.
Optional<TimeWindow>	assignStateNamespace(org.apache.flink.table.data.RowData element, ClockService clock, MergingWindowProcessFunction<?,TimeWindow> windowFunction) Returns the Window that the given element should belong to be used as a namespace to restore the state.
String	getDescription() Returns a description of this window assigner.
MergingWindowAssigner<TimeWindow>	getMergingWindowAssigner() Currently, unslice assigner has an inner MergingWindowAssigner to reuse the logic in GroupWindowAssigner to merge windows.
protected long	getUtcTimestamp(org.apache.flink.table.data.RowData element, ClockService clock)
boolean	isEventTime() Returns true if elements are assigned to windows based on event time, false based on processing time.

从类继承的方法 java.lang.Object

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

构造器详细资料

SessionUnsliceAssigner

public SessionUnsliceAssigner(int rowtimeIndex,
                              ZoneId shiftTimeZone,
                              long sessionGap)

方法详细资料

getMergingWindowAssigner

public MergingWindowAssigner<TimeWindow> getMergingWindowAssigner()

从接口复制的说明: UnsliceAssigner

Currently, unslice assigner has an inner MergingWindowAssigner to reuse the logic in GroupWindowAssigner to merge windows.

指定者:

getMergingWindowAssigner 在接口中 UnsliceAssigner<TimeWindow>

assignActualWindow

public Optional<TimeWindow> assignActualWindow(org.apache.flink.table.data.RowData element,
                                               ClockService clock,
                                               MergingWindowProcessFunction<?,TimeWindow> windowFunction)
                                        throws Exception

从接口复制的说明: UnsliceAssigner

Returns the Window that the given element should belong to be used to trigger on.

See more details in MergingWindowProcessFunction.assignActualWindows(org.apache.flink.table.data.RowData, long).

指定者:

assignActualWindow 在接口中 UnsliceAssigner<TimeWindow>

参数:

element - the element to which slice should belong to.

clock - the service to get current processing time.

返回:

if empty, that means the element is late.

抛出:

Exception

assignStateNamespace

public Optional<TimeWindow> assignStateNamespace(org.apache.flink.table.data.RowData element,
                                                 ClockService clock,
                                                 MergingWindowProcessFunction<?,TimeWindow> windowFunction)
                                          throws Exception

从接口复制的说明: UnsliceAssigner

Returns the Window that the given element should belong to be used as a namespace to restore the state.

See more details in MergingWindowProcessFunction.assignStateNamespace(org.apache.flink.table.data.RowData, long).

指定者:

assignStateNamespace 在接口中 UnsliceAssigner<TimeWindow>

参数:

element - the element to which slice should belong to.

clock - the service to get current processing time.

返回:

if empty, that means the element is late.

抛出:

Exception

getUtcTimestamp

protected long getUtcTimestamp(org.apache.flink.table.data.RowData element,
                               ClockService clock)

isEventTime

public boolean isEventTime()

从接口复制的说明: WindowAssigner

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

指定者:

isEventTime 在接口中 WindowAssigner

getDescription

public String getDescription()

从接口复制的说明: WindowAssigner

Returns a description of this window assigner.

指定者:

getDescription 在接口中 WindowAssigner