Package org.apache.flink.cep.operator

Class CepOperator<IN,KEY,OUT>

java.lang.Object

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

org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator<OUT,PatternProcessFunction<IN,OUT>>

org.apache.flink.cep.operator.CepOperator<IN,KEY,OUT>

Type Parameters:

IN - Type of the input elements

KEY - Type of the key on which the input stream is keyed

OUT - Type of the output elements

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.state.CheckpointListener, org.apache.flink.streaming.api.operators.Input<IN>, org.apache.flink.streaming.api.operators.KeyContext, org.apache.flink.streaming.api.operators.KeyContextHandler, org.apache.flink.streaming.api.operators.OneInputStreamOperator<IN,OUT>, org.apache.flink.streaming.api.operators.OutputTypeConfigurable<OUT>, org.apache.flink.streaming.api.operators.StreamOperator<OUT>, org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.CheckpointedStreamOperator, org.apache.flink.streaming.api.operators.Triggerable<KEY,org.apache.flink.runtime.state.VoidNamespace>, org.apache.flink.streaming.api.operators.UserFunctionProvider<PatternProcessFunction<IN,OUT>>, org.apache.flink.streaming.api.operators.YieldingOperator<OUT>

@Internal
public class CepOperator<IN,KEY,OUT>
extends org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator<OUT,PatternProcessFunction<IN,OUT>>
implements org.apache.flink.streaming.api.operators.OneInputStreamOperator<IN,OUT>, org.apache.flink.streaming.api.operators.Triggerable<KEY,org.apache.flink.runtime.state.VoidNamespace>

CEP pattern operator for a keyed input stream. For each key, the operator creates a NFA and a priority queue to buffer out of order elements. Both data structures are stored using the managed keyed state.

See Also:

• Serialized Form

Field Summary

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

userFunction

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

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

Constructor Summary

Constructors

Constructor	Description
CepOperator(org.apache.flink.api.common.typeutils.TypeSerializer<IN> inputSerializer, boolean isProcessingTime, NFACompiler.NFAFactory<IN> nfaFactory, EventComparator<IN> comparator, AfterMatchSkipStrategy afterMatchSkipStrategy, PatternProcessFunction<IN,OUT> function, org.apache.flink.util.OutputTag<IN> lateDataOutputTag)

Method Summary

Modifier and Type	Method	Description
void	close()
void	initializeState(org.apache.flink.runtime.state.StateInitializationContext context)
void	onEventTime(org.apache.flink.streaming.api.operators.InternalTimer<KEY,org.apache.flink.runtime.state.VoidNamespace> timer)
void	onProcessingTime(org.apache.flink.streaming.api.operators.InternalTimer<KEY,org.apache.flink.runtime.state.VoidNamespace> timer)
void	open()
void	processElement(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<IN> element)
protected void	setup(org.apache.flink.streaming.runtime.tasks.StreamTask<?,?> containingTask, org.apache.flink.streaming.api.graph.StreamConfig config, org.apache.flink.streaming.api.operators.Output<org.apache.flink.streaming.runtime.streamrecord.StreamRecord<OUT>> output)
boolean	useSplittableTimers()

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

finish, getUserFunction, getUserFunctionParameters, notifyCheckpointAborted, notifyCheckpointComplete, setOutputType, snapshotState

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

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

processLatencyMarker, processRecordAttributes, processWatermark, processWatermark, processWatermarkStatus

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.OneInputStreamOperator

setKeyContextElement

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

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

Constructor Details

CepOperator

public CepOperator(org.apache.flink.api.common.typeutils.TypeSerializer<IN> inputSerializer,
 boolean isProcessingTime,
 NFACompiler.NFAFactory<IN> nfaFactory,
 @Nullable
 EventComparator<IN> comparator,
 @Nullable
 AfterMatchSkipStrategy afterMatchSkipStrategy,
 PatternProcessFunction<IN,OUT> function,
 @Nullable
 org.apache.flink.util.OutputTag<IN> lateDataOutputTag)

Method Details

useSplittableTimers

public boolean useSplittableTimers()

Overrides:

useSplittableTimers in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<OUT>

setup

protected void setup(org.apache.flink.streaming.runtime.tasks.StreamTask<?,?> containingTask,
 org.apache.flink.streaming.api.graph.StreamConfig config,
 org.apache.flink.streaming.api.operators.Output<org.apache.flink.streaming.runtime.streamrecord.StreamRecord<OUT>> output)

Overrides:

setup in class org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator<OUT,PatternProcessFunction<IN,OUT>>

initializeState

public void initializeState(org.apache.flink.runtime.state.StateInitializationContext context)
                     throws Exception

Specified by:

initializeState in interface org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.CheckpointedStreamOperator

Overrides:

initializeState in class org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator<OUT,PatternProcessFunction<IN,OUT>>

Throws:

Exception

open

public void open()
          throws Exception

Specified by:

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

Overrides:

open in class org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator<OUT,PatternProcessFunction<IN,OUT>>

Throws:

Exception

close

public void close()
           throws Exception

Specified by:

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

Overrides:

close in class org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator<OUT,PatternProcessFunction<IN,OUT>>

Throws:

Exception

processElement

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

Specified by:

processElement in interface org.apache.flink.streaming.api.operators.Input<IN>

Throws:

Exception

onEventTime

public void onEventTime(org.apache.flink.streaming.api.operators.InternalTimer<KEY,org.apache.flink.runtime.state.VoidNamespace> timer)
                 throws Exception

Specified by:

onEventTime in interface org.apache.flink.streaming.api.operators.Triggerable<IN,KEY>

Throws:

Exception

onProcessingTime

public void onProcessingTime(org.apache.flink.streaming.api.operators.InternalTimer<KEY,org.apache.flink.runtime.state.VoidNamespace> timer)
                      throws Exception

Specified by:

onProcessingTime in interface org.apache.flink.streaming.api.operators.Triggerable<IN,KEY>

Throws:

Exception