org.apache.flink.streaming.runtime.tasks

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

java.lang.Object

org.apache.flink.runtime.jobgraph.tasks.AbstractInvokable

org.apache.flink.streaming.runtime.tasks.StreamTask<OUT,OP>

org.apache.flink.streaming.runtime.tasks.SourceStreamTask<OUT,SRC,OP>

类型参数:

OUT - Type of the output elements of this source.

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

OP - Type of the stream source operator

所有已实现的接口:

AsyncExceptionHandler

直接已知子类:

StoppableSourceStreamTask

@Internal
public class SourceStreamTask<OUT,SRC extends SourceFunction<OUT>,OP extends StreamSource<OUT,SRC>>
extends StreamTask<OUT,OP>

StreamTask for executing a StreamSource.

One important aspect of this is that the checkpointing and the emission of elements must never occur at the same time. The execution must be serial. This is achieved by having the contract with the SourceFunction that it must only modify its state or emit elements in a synchronized block that locks on the lock Object. Also, the modification of the state and the emission of elements must happen in the same block of code that is protected by the synchronized block.

嵌套类概要

从类继承的嵌套类/接口 org.apache.flink.streaming.runtime.tasks.StreamTask

StreamTask.AsyncCheckpointRunnable

字段概要

从类继承的字段 org.apache.flink.streaming.runtime.tasks.StreamTask

configuration, headOperator, operatorChain, stateBackend, timerService, TRIGGER_THREAD_GROUP

构造器概要

构造器

构造器和说明
SourceStreamTask(org.apache.flink.runtime.execution.Environment env)

方法概要

限定符和类型	方法和说明
protected void	cancelTask()
protected void	cleanup()
protected void	init()
protected void	run()
boolean	triggerCheckpoint(org.apache.flink.runtime.checkpoint.CheckpointMetaData checkpointMetaData, org.apache.flink.runtime.checkpoint.CheckpointOptions checkpointOptions)

从类继承的方法 org.apache.flink.streaming.runtime.tasks.StreamTask

abortCheckpointOnBarrier, cancel, createCheckpointExceptionHandlerFactory, createRecordWriters, createStreamTaskStateInitializer, finalize, getAccumulatorMap, getAsyncOperationsThreadPool, getCancelables, getCheckpointLock, getCheckpointStorage, getConfiguration, getName, getProcessingTimeService, getStreamStatusMaintainer, handleAsyncException, invoke, isCanceled, isRunning, notifyCheckpointComplete, toString, triggerCheckpointOnBarrier

从类继承的方法 org.apache.flink.runtime.jobgraph.tasks.AbstractInvokable

getCurrentNumberOfSubtasks, getEnvironment, getExecutionConfig, getIndexInSubtaskGroup, getJobConfiguration, getTaskConfiguration, getUserCodeClassLoader, setShouldInterruptOnCancel, shouldInterruptOnCancel

从类继承的方法 java.lang.Object

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

构造器详细资料

SourceStreamTask

public SourceStreamTask(org.apache.flink.runtime.execution.Environment env)

方法详细资料

init

protected void init()

指定者:

init 在类中 StreamTask<OUT,OP extends StreamSource<OUT,SRC>>

cleanup

protected void cleanup()

指定者:

cleanup 在类中 StreamTask<OUT,OP extends StreamSource<OUT,SRC>>

run

protected void run()
            throws Exception

指定者:

run 在类中 StreamTask<OUT,OP extends StreamSource<OUT,SRC>>

抛出:

Exception

cancelTask

protected void cancelTask()
                   throws Exception

指定者:

cancelTask 在类中 StreamTask<OUT,OP extends StreamSource<OUT,SRC>>

抛出:

Exception

triggerCheckpoint

public boolean triggerCheckpoint(org.apache.flink.runtime.checkpoint.CheckpointMetaData checkpointMetaData,
                                 org.apache.flink.runtime.checkpoint.CheckpointOptions checkpointOptions)
                          throws Exception

覆盖:

triggerCheckpoint 在类中 StreamTask<OUT,OP extends StreamSource<OUT,SRC>>

抛出:

Exception