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

Class WatermarkAssignerOperator

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<BaseRow>

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

All Implemented Interfaces:

Serializable, org.apache.flink.runtime.state.CheckpointListener, org.apache.flink.streaming.api.operators.KeyContext, org.apache.flink.streaming.api.operators.OneInputStreamOperator<BaseRow,BaseRow>, org.apache.flink.streaming.api.operators.SetupableStreamOperator<BaseRow>, org.apache.flink.streaming.api.operators.StreamOperator<BaseRow>, org.apache.flink.streaming.runtime.tasks.ProcessingTimeCallback, org.apache.flink.util.Disposable

public class WatermarkAssignerOperator
extends org.apache.flink.streaming.api.operators.AbstractStreamOperator<BaseRow>
implements org.apache.flink.streaming.api.operators.OneInputStreamOperator<BaseRow,BaseRow>, org.apache.flink.streaming.runtime.tasks.ProcessingTimeCallback

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

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

org.apache.flink.streaming.api.operators.AbstractStreamOperator.CountingOutput<OUT>

Field Summary

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

chainingStrategy, config, latencyStats, LOG, metrics, output, timeServiceManager

Constructor Summary

Constructors

Constructor and Description
WatermarkAssignerOperator(int rowtimeFieldIndex, long watermarkDelay, long idleTimeout) Create a watermark assigner operator.

Method Summary

Modifier and Type	Method and Description
void	close()
void	endInput()
void	onProcessingTime(long timestamp)
void	open()
void	processElement(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<BaseRow> 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 AssignerWithPeriodicWatermarks to emit watermarks from here).

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

dispose, getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getUserCodeClassloader, initializeState, initializeState, notifyCheckpointComplete, numEventTimeTimers, numProcessingTimeTimers, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark1, processWatermark2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, 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

processLatencyMarker

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

dispose, getChainingStrategy, getMetricGroup, getOperatorID, initializeState, prepareSnapshotPreBarrier, setChainingStrategy, setKeyContextElement1, setKeyContextElement2, snapshotState

Methods inherited from interface org.apache.flink.runtime.state.CheckpointListener

notifyCheckpointComplete

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

getCurrentKey, setCurrentKey

Constructor Detail

WatermarkAssignerOperator

public WatermarkAssignerOperator(int rowtimeFieldIndex,
                                 long watermarkDelay,
                                 long idleTimeout)

Create a watermark assigner operator.

Parameters:

rowtimeFieldIndex - the field index to extract event timestamp

watermarkDelay - the delay by which watermarks are behind the maximum observed timestamp.

idleTimeout - (idleness checking timeout)

Method Detail

open

public void open()
          throws Exception

Specified by:

open in interface org.apache.flink.streaming.api.operators.StreamOperator<BaseRow>

Overrides:

open in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<BaseRow>

Throws:

Exception

processElement

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

Specified by:

processElement in interface org.apache.flink.streaming.api.operators.OneInputStreamOperator<BaseRow,BaseRow>

Throws:

Exception

onProcessingTime

public void onProcessingTime(long timestamp)
                      throws Exception

Specified by:

onProcessingTime in interface org.apache.flink.streaming.runtime.tasks.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 AssignerWithPeriodicWatermarks to emit watermarks from here).

Specified by:

processWatermark in interface org.apache.flink.streaming.api.operators.OneInputStreamOperator<BaseRow,BaseRow>

Overrides:

processWatermark in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<BaseRow>

Throws:

Exception

endInput

public void endInput()
              throws Exception

Throws:

Exception

close

public void close()
           throws Exception

Specified by:

close in interface org.apache.flink.streaming.api.operators.StreamOperator<BaseRow>

Overrides:

close in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<BaseRow>

Throws:

Exception