org.apache.flink.streaming.runtime.tasks

Class SourceOperatorStreamTask<T>

java.lang.Object

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

org.apache.flink.streaming.runtime.tasks.StreamTask<T,SourceOperator<T,?>>

org.apache.flink.streaming.runtime.tasks.SourceOperatorStreamTask<T>

All Implemented Interfaces:

AsyncExceptionHandler

@Internal
public class SourceOperatorStreamTask<T>
extends StreamTask<T,SourceOperator<T,?>>

A subclass of StreamTask for executing the SourceOperator.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SourceOperatorStreamTask.AsyncDataOutputToOutput<T> Implementation of PushingAsyncDataInput.DataOutput that wraps a specific Output.

Field Summary

Fields inherited from class org.apache.flink.streaming.runtime.tasks.StreamTask

checkpointStorage, configuration, inputProcessor, LOG, mailboxProcessor, mainOperator, operatorChain, stateBackend, systemTimerService, timerService, TRIGGER_THREAD_GROUP

Constructor Summary

Constructors

Constructor and Description
SourceOperatorStreamTask(org.apache.flink.runtime.execution.Environment env)

Method Summary

Modifier and Type	Method and Description
protected void	advanceToEndOfEventTime() Emits the MAX_WATERMARK so that all registered timers are fired.
protected void	afterInvoke()
protected void	finishTask() Instructs the task to go through its normal termination routine, i.e.
protected CompletableFuture<Void>	getCompletionFuture()
void	init()
Future<Boolean>	triggerCheckpointAsync(org.apache.flink.runtime.checkpoint.CheckpointMetaData checkpointMetaData, org.apache.flink.runtime.checkpoint.CheckpointOptions checkpointOptions)

Methods inherited from class org.apache.flink.streaming.runtime.tasks.StreamTask

abortCheckpointOnBarrier, cancel, cancelTask, cleanup, cleanUpInvoke, createRecordWriterDelegate, createStreamTaskStateInitializer, declineCheckpoint, dispatchOperatorEvent, finalize, getAsyncCheckpointStartDelayNanos, getAsyncOperationsThreadPool, getCancelables, getCheckpointStorage, getConfiguration, getMailboxExecutorFactory, getName, getProcessingTimeServiceFactory, getStreamStatusMaintainer, handleAsyncException, invoke, isCanceled, isFailing, isMailboxLoopRunning, isRunning, isUsingNonBlockingInput, notifyCheckpointAbortAsync, notifyCheckpointCompleteAsync, processInput, restore, runMailboxLoop, runMailboxStep, setupNumRecordsInCounter, toString, triggerCheckpointOnBarrier

Methods inherited from class org.apache.flink.runtime.jobgraph.tasks.AbstractInvokable

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

Methods inherited from class java.lang.Object

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

Constructor Detail

SourceOperatorStreamTask

public SourceOperatorStreamTask(org.apache.flink.runtime.execution.Environment env)
                         throws Exception

Throws:

Exception

Method Detail

getCompletionFuture

protected CompletableFuture<Void> getCompletionFuture()

Overrides:

getCompletionFuture in class StreamTask<T,SourceOperator<T,?>>

init

public void init()
          throws Exception

Specified by:

init in class StreamTask<T,SourceOperator<T,?>>

Throws:

Exception

finishTask

protected void finishTask()
                   throws Exception

Description copied from class: StreamTask

Instructs the task to go through its normal termination routine, i.e. exit the run-loop and call StreamOperator.close() and StreamOperator.dispose() on its operators.

This is used by the source task to get out of the run-loop when the job is stopped with a savepoint.

For tasks other than the source task, this method does nothing.

Overrides:

finishTask in class StreamTask<T,SourceOperator<T,?>>

Throws:

Exception

triggerCheckpointAsync

public Future<Boolean> triggerCheckpointAsync(org.apache.flink.runtime.checkpoint.CheckpointMetaData checkpointMetaData,
                                              org.apache.flink.runtime.checkpoint.CheckpointOptions checkpointOptions)

Overrides:

triggerCheckpointAsync in class StreamTask<T,SourceOperator<T,?>>

advanceToEndOfEventTime

protected void advanceToEndOfEventTime()

Description copied from class: StreamTask

Emits the MAX_WATERMARK so that all registered timers are fired.

This is used by the source task when the job is TERMINATED. In the case, we want all the timers registered throughout the pipeline to fire and the related state (e.g. windows) to be flushed.

For tasks other than the source task, this method does nothing.

Overrides:

advanceToEndOfEventTime in class StreamTask<T,SourceOperator<T,?>>

afterInvoke

protected void afterInvoke()
                    throws Exception

Overrides:

afterInvoke in class StreamTask<T,SourceOperator<T,?>>

Throws:

Exception