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.runtime.state.CheckpointListener, KeyContext, OutputTypeConfigurable<OUT>, SetupableStreamOperator<OUT>, StreamOperator<OUT>, org.apache.flink.util.Disposable

@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

嵌套类概要

从类继承的嵌套类/接口 org.apache.flink.streaming.api.operators.AbstractStreamOperator

AbstractStreamOperator.CountingOutput<OUT>

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, timeServiceManager

构造器概要

构造器

构造器和说明
StreamSource(SRC sourceFunction)

方法概要

限定符和类型	方法和说明
void	advanceToEndOfEventTime()
void	cancel()
void	close() This method is called after all records have been added to the operators via the methods OneInputStreamOperator.processElement(StreamRecord), or TwoInputStreamOperator.processElement1(StreamRecord) and TwoInputStreamOperator.processElement2(StreamRecord).
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, StreamStatusMaintainer streamStatusMaintainer, OperatorChain<?,?> operatorChain)
void	run(Object lockingObject, StreamStatusMaintainer streamStatusMaintainer, Output<StreamRecord<OUT>> collector, OperatorChain<?,?> operatorChain)

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

dispose, getUserFunction, getUserFunctionParameters, initializeState, 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, getUserCodeClassloader, initializeState, numEventTimeTimers, numProcessingTimeTimers, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, 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)

方法详细资料

run

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

抛出:

Exception

run

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

抛出:

Exception

advanceToEndOfEventTime

public void advanceToEndOfEventTime()

close

public void close()
           throws Exception

从类复制的说明: AbstractStreamOperator

This method is called after all records have been added to the operators via the methods OneInputStreamOperator.processElement(StreamRecord), or TwoInputStreamOperator.processElement1(StreamRecord) and TwoInputStreamOperator.processElement2(StreamRecord).

The method is expected to flush all remaining buffered data. Exceptions during this flushing of buffered should be propagated, in order to cause the operation to be recognized asa failed, because the last data items are not processed properly.

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

cancel

public void cancel()

markCanceledOrStopped

protected void markCanceledOrStopped()

Marks this source as canceled or stopped.

This indicates that any exit of the #run(Object, StreamStatusMaintainer, Output) 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.