org.apache.flink.streaming.api.operators

类 StreamSource<OUT,SRC extends SourceFunction<OUT>>

java.lang.Object

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

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

org.apache.flink.streaming.api.operators.StreamSource<OUT,SRC>

类型参数:

OUT - Type of the output elements

SRC - Type of the source function of this stream source operator

所有已实现的接口:

Serializable, org.apache.flink.api.common.state.CheckpointListener, KeyContext, OutputTypeConfigurable<OUT>, SetupableStreamOperator<OUT>, StreamOperator<OUT>, StreamOperatorStateHandler.CheckpointedStreamOperator

@Internal
public class StreamSource<OUT,SRC extends SourceFunction<OUT>>
extends AbstractUdfStreamOperator<OUT,SRC>

StreamOperator for streaming sources.

另请参阅:

序列化表格

字段概要

从类继承的字段 org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator

userFunction

从类继承的字段 org.apache.flink.streaming.api.operators.AbstractStreamOperator

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

构造器概要

构造器

构造器和说明
StreamSource(SRC sourceFunction)
StreamSource(SRC sourceFunction, boolean emitProgressiveWatermarks)

方法概要

限定符和类型	方法和说明
void	cancel()
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.
boolean	emitsProgressiveWatermarks()
protected boolean	isCanceledOrStopped() Checks whether the source has been canceled or stopped.
protected void	markCanceledOrStopped() Marks this source as canceled or stopped.
void	run(Object lockingObject, OperatorChain<?,?> operatorChain)
void	run(Object lockingObject, Output<StreamRecord<OUT>> collector, OperatorChain<?,?> operatorChain)
void	stop()

从类继承的方法 org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator

finish, getUserFunction, getUserFunctionParameters, initializeState, notifyCheckpointAborted, notifyCheckpointComplete, open, setOutputType, setup, snapshotState

从类继承的方法 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, initializeState, isUsingCustomRawKeyedState, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, registerCounterOnOutput, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setProcessingTimeService, snapshotState

从类继承的方法 java.lang.Object

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

构造器详细资料

StreamSource

public StreamSource(SRC sourceFunction,
                    boolean emitProgressiveWatermarks)

StreamSource

public StreamSource(SRC sourceFunction)

方法详细资料

emitsProgressiveWatermarks

@VisibleForTesting
public boolean emitsProgressiveWatermarks()

run

public void run(Object lockingObject,
                OperatorChain<?,?> operatorChain)
         throws Exception

抛出:

Exception

run

public void run(Object lockingObject,
                Output<StreamRecord<OUT>> collector,
                OperatorChain<?,?> operatorChain)
         throws Exception

抛出:

Exception

close

public void close()
           throws Exception

从接口复制的说明: 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.

指定者:

close 在接口中 StreamOperator<OUT>

覆盖:

close 在类中 AbstractUdfStreamOperator<OUT,SRC extends SourceFunction<OUT>>

抛出:

Exception

stop

public void stop()

cancel

public void cancel()

markCanceledOrStopped

protected void markCanceledOrStopped()

Marks this source as canceled or stopped.

This indicates that any exit of the run(Object, Output, OperatorChain) method cannot be interpreted as the result of a finite source.

isCanceledOrStopped

protected boolean isCanceledOrStopped()

Checks whether the source has been canceled or stopped.

返回:

True, if the source is canceled or stopped, false is not.