Package org.apache.flink.table.runtime.operators.join.window

Class WindowJoinOperator

java.lang.Object

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

org.apache.flink.table.runtime.operators.TableStreamOperator<RowData>

org.apache.flink.table.runtime.operators.join.window.WindowJoinOperator

All Implemented Interfaces:

Serializable, CheckpointListener, KeyContext, KeyContextHandler, StreamOperator<RowData>, StreamOperatorStateHandler.CheckpointedStreamOperator, Triggerable<RowData,Long>, TwoInputStreamOperator<RowData,RowData,RowData>, YieldingOperator<RowData>

public abstract class WindowJoinOperator
extends TableStreamOperator<RowData>
implements TwoInputStreamOperator<RowData,RowData,RowData>, Triggerable<RowData,Long>, KeyContext

Streaming window join operator.

Note: currently, WindowJoinOperator doesn't support early-fire and late-arrival. Thus late elements (elements belong to emitted windows) will be simply dropped.

Note: currently, WindowJoinOperator doesn't support DELETE or UPDATE_BEFORE input row.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.table.runtime.operators.TableStreamOperator

TableStreamOperator.ContextImpl

Field Summary

Fields

Modifier and Type	Field	Description
protected TimestampedCollector<RowData>	collector	This is used for emitting elements with a given timestamp.
protected JoinConditionWithNullFilters	joinCondition
protected RowDataSerializer	leftSerializer
protected RowDataSerializer	rightSerializer

Fields inherited from class org.apache.flink.table.runtime.operators.TableStreamOperator

ctx, currentWatermark

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

config, lastRecordAttributes1, lastRecordAttributes2, latencyStats, LOG, metrics, output, processingTimeService, stateHandler, stateKeySelector1, stateKeySelector2, timeServiceManager

Method Summary

Modifier and Type	Method	Description
void	close()	This method is called at the very end of the operator's life, both in the case of a successful completion of the operation, and in the case of a failure and canceling.
abstract void	join(Iterable<RowData> leftRecords, Iterable<RowData> rightRecords)
void	onEventTime(InternalTimer<RowData,Long> timer)	Invoked when an event-time timer fires.
void	onProcessingTime(InternalTimer<RowData,Long> timer)	Invoked when a processing-time timer fires.
void	open()	This method is called immediately before any elements are processed, it should contain the operator's initialization logic, e.g. state initialization.
void	processElement1(StreamRecord<RowData> element)	Processes one element that arrived on the first input of this two-input operator.
void	processElement2(StreamRecord<RowData> element)	Processes one element that arrived on the second input of this two-input operator.

Methods inherited from class org.apache.flink.table.runtime.operators.TableStreamOperator

computeMemorySize, processWatermark, useSplittableTimers

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

finish, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getStateKeySelector1, getStateKeySelector2, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processRecordAttributes, processRecordAttributes1, processRecordAttributes2, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setMailboxExecutor, 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.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.KeyContextHandler

hasKeyContext

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

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

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

processLatencyMarker1, processLatencyMarker2, processRecordAttributes1, processRecordAttributes2, processWatermark1, processWatermark2, processWatermarkStatus1, processWatermarkStatus2

Field Detail

leftSerializer

protected final RowDataSerializer leftSerializer

rightSerializer

protected final RowDataSerializer rightSerializer

joinCondition

protected transient JoinConditionWithNullFilters joinCondition

collector

protected transient TimestampedCollector<RowData> collector

This is used for emitting elements with a given timestamp.

Method Detail

open

public void open()
          throws Exception

Description copied from class: AbstractStreamOperator

This method is called immediately before any elements are processed, it should contain the operator's initialization logic, e.g. state initialization.

The default implementation does nothing.

Specified by:

open in interface StreamOperator<RowData>

Overrides:

open in class TableStreamOperator<RowData>

Throws:

Exception - An exception in this method causes the operator to fail.

close

public void close()
           throws Exception

Description copied from interface: StreamOperator

This method is called at the very end of the operator's life, both in the case of a successful completion of the operation, and in the case of a failure and canceling.

This method is expected to make a thorough effort to release all resources that the operator has acquired.

NOTE:It can not emit any records! If you need to emit records at the end of processing, do so in the StreamOperator.finish() method.

Specified by:

close in interface StreamOperator<RowData>

Overrides:

close in class AbstractStreamOperator<RowData>

Throws:

Exception

processElement1

public void processElement1(StreamRecord<RowData> element)
                     throws Exception

Description copied from interface: TwoInputStreamOperator

Processes one element that arrived on the first input of this two-input operator. This method is guaranteed to not be called concurrently with other methods of the operator.

Specified by:

processElement1 in interface TwoInputStreamOperator<RowData,RowData,RowData>

Throws:

Exception

processElement2

public void processElement2(StreamRecord<RowData> element)
                     throws Exception

Description copied from interface: TwoInputStreamOperator

Processes one element that arrived on the second input of this two-input operator. This method is guaranteed to not be called concurrently with other methods of the operator.

Specified by:

processElement2 in interface TwoInputStreamOperator<RowData,RowData,RowData>

Throws:

Exception

onProcessingTime

public void onProcessingTime(InternalTimer<RowData,Long> timer)
                      throws Exception

Description copied from interface: Triggerable

Invoked when a processing-time timer fires.

Specified by:

onProcessingTime in interface Triggerable<RowData,Long>

Throws:

Exception

onEventTime

public void onEventTime(InternalTimer<RowData,Long> timer)
                 throws Exception

Description copied from interface: Triggerable

Invoked when an event-time timer fires.

Specified by:

onEventTime in interface Triggerable<RowData,Long>

Throws:

Exception

join

public abstract void join(Iterable<RowData> leftRecords,
                          Iterable<RowData> rightRecords)