org.apache.flink.table.runtime.operators.wmassigners

Class WatermarkAssignerOperator

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>

org.apache.flink.table.runtime.operators.wmassigners.WatermarkAssignerOperator

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.operators.ProcessingTimeService.ProcessingTimeCallback, org.apache.flink.api.common.state.CheckpointListener, org.apache.flink.streaming.api.operators.Input<org.apache.flink.table.data.RowData>, org.apache.flink.streaming.api.operators.KeyContext, org.apache.flink.streaming.api.operators.KeyContextHandler, org.apache.flink.streaming.api.operators.OneInputStreamOperator<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>, org.apache.flink.streaming.api.operators.SetupableStreamOperator<org.apache.flink.table.data.RowData>, org.apache.flink.streaming.api.operators.StreamOperator<org.apache.flink.table.data.RowData>, org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.CheckpointedStreamOperator

public class WatermarkAssignerOperator
extends org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>
implements org.apache.flink.streaming.api.operators.OneInputStreamOperator<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>, org.apache.flink.api.common.operators.ProcessingTimeService.ProcessingTimeCallback

A stream operator that extracts timestamps from stream elements and generates periodic watermarks.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

chainingStrategy, config, lastRecordAttributes1, lastRecordAttributes2, latencyStats, LOG, metrics, output, processingTimeService

Constructor Summary

Constructors

Constructor and Description
WatermarkAssignerOperator(int rowtimeFieldIndex, WatermarkGenerator watermarkGenerator, long idleTimeout, org.apache.flink.streaming.runtime.tasks.ProcessingTimeService processingTimeService) Create a watermark assigner operator.

Method Summary

Modifier and Type	Method and Description
void	close()
void	finish()
void	onProcessingTime(long timestamp)
void	open()
void	processElement(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<org.apache.flink.table.data.RowData> element)
void	processWatermark(org.apache.flink.streaming.api.watermark.Watermark mark) Override the base implementation to completely ignore watermarks propagated from upstream (we rely only on the WatermarkGenerator to emit watermarks from here).
void	processWatermarkStatus(org.apache.flink.streaming.runtime.watermarkstatus.WatermarkStatus watermarkStatus)

Methods inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processRecordAttributes, processRecordAttributes1, processRecordAttributes2, processWatermark1, processWatermark2, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setProcessingTimeService, setup, snapshotState, snapshotState

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.streaming.api.operators.OneInputStreamOperator

setKeyContextElement

Methods inherited from interface org.apache.flink.streaming.api.operators.StreamOperator

getMetricGroup, getOperatorID, initializeState, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState

Methods inherited from interface org.apache.flink.api.common.state.CheckpointListener

notifyCheckpointAborted, notifyCheckpointComplete

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContext

getCurrentKey, setCurrentKey

Methods inherited from interface org.apache.flink.streaming.api.operators.Input

processLatencyMarker, processRecordAttributes

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContextHandler

hasKeyContext

Constructor Detail

WatermarkAssignerOperator

public WatermarkAssignerOperator(int rowtimeFieldIndex,
                                 WatermarkGenerator watermarkGenerator,
                                 long idleTimeout,
                                 org.apache.flink.streaming.runtime.tasks.ProcessingTimeService processingTimeService)

Create a watermark assigner operator.

Parameters:

rowtimeFieldIndex - the field index to extract event timestamp

watermarkGenerator - the watermark generator

idleTimeout - (idleness checking timeout)

Method Detail

open

public void open()
          throws Exception

Specified by:

open in interface org.apache.flink.streaming.api.operators.StreamOperator<org.apache.flink.table.data.RowData>

Overrides:

open in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>

Throws:

Exception

processElement

public void processElement(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<org.apache.flink.table.data.RowData> element)
                    throws Exception

Specified by:

processElement in interface org.apache.flink.streaming.api.operators.Input<org.apache.flink.table.data.RowData>

Throws:

Exception

onProcessingTime

public void onProcessingTime(long timestamp)
                      throws Exception

Specified by:

onProcessingTime in interface org.apache.flink.api.common.operators.ProcessingTimeService.ProcessingTimeCallback

Throws:

Exception

processWatermark

public void processWatermark(org.apache.flink.streaming.api.watermark.Watermark mark)
                      throws Exception

Override the base implementation to completely ignore watermarks propagated from upstream (we rely only on the WatermarkGenerator to emit watermarks from here).

Specified by:

processWatermark in interface org.apache.flink.streaming.api.operators.Input<org.apache.flink.table.data.RowData>

Overrides:

processWatermark in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>

Throws:

Exception

processWatermarkStatus

public void processWatermarkStatus(org.apache.flink.streaming.runtime.watermarkstatus.WatermarkStatus watermarkStatus)
                            throws Exception

Specified by:

processWatermarkStatus in interface org.apache.flink.streaming.api.operators.Input<org.apache.flink.table.data.RowData>

Overrides:

processWatermarkStatus in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>

Throws:

Exception

finish

public void finish()
            throws Exception

Specified by:

finish in interface org.apache.flink.streaming.api.operators.StreamOperator<org.apache.flink.table.data.RowData>

Overrides:

finish in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>

Throws:

Exception

close

public void close()
           throws Exception

Specified by:

close in interface org.apache.flink.streaming.api.operators.StreamOperator<org.apache.flink.table.data.RowData>

Overrides:

close in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>

Throws:

Exception