Package org.apache.flink.streaming.runtime.watermark.extension.eventtime

Class EventTimeWatermarkHandler

java.lang.Object

org.apache.flink.streaming.runtime.watermark.extension.eventtime.EventTimeWatermarkHandler

public class EventTimeWatermarkHandler
extends Object

This class is used to handle EventTimeExtension related watermarks in operator, such as EventTimeExtension.EVENT_TIME_WATERMARK_DECLARATION and EventTimeExtension.IDLE_STATUS_WATERMARK_DECLARATION. It will emit event time watermark and idle status to downstream operators according to received watermarks.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	EventTimeWatermarkHandler.EventTimeUpdateStatus	This class represents event-time updated status.

Constructor Summary

Constructors

Constructor	Description
EventTimeWatermarkHandler(int numOfInput, Output<?> output, InternalTimeServiceManager<?> timeServiceManager)

Method Summary

Modifier and Type	Method	Description
long	getLastEmitWatermark()
EventTimeWatermarkHandler.EventTimeUpdateStatus	processWatermark(org.apache.flink.api.common.watermark.Watermark watermark, int inputIndex)	Process EventTimeWatermark/IdleStatusWatermark.

Methods inherited from class java.lang.Object

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

Constructor Detail

EventTimeWatermarkHandler

public EventTimeWatermarkHandler(int numOfInput,
                                 Output<?> output,
                                 @Nullable
                                 InternalTimeServiceManager<?> timeServiceManager)

Method Detail

getLastEmitWatermark

public long getLastEmitWatermark()

processWatermark

public EventTimeWatermarkHandler.EventTimeUpdateStatus processWatermark(org.apache.flink.api.common.watermark.Watermark watermark,
                                                                        int inputIndex)
                                                                 throws Exception

Process EventTimeWatermark/IdleStatusWatermark.

It's caller's responsibility to check whether the watermark is EventTimeWatermark/IdleStatusWatermark.

Returns:

the status of event time watermark update.

Throws:

Exception