org.apache.flink.streaming.runtime.tasks

Class OneInputStreamTask<IN,OUT>

java.lang.Object

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

org.apache.flink.streaming.runtime.tasks.OneInputStreamTask<IN,OUT>

All Implemented Interfaces:

CheckpointableTask, CoordinatedTask, TaskInvokable, AsyncExceptionHandler, ContainingTaskDetails

Direct Known Subclasses:

StreamIterationHead, StreamIterationTail

@Internal
public class OneInputStreamTask<IN,OUT>
extends StreamTask<OUT,OneInputStreamOperator<IN,OUT>>

A StreamTask for executing a OneInputStreamOperator.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.streaming.runtime.tasks.StreamTask

StreamTask.CanEmitBatchOfRecordsChecker

Field Summary

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

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

Constructor Summary

Constructors

Constructor and Description
OneInputStreamTask(Environment env) Constructor for initialization, possibly with initial state (recovery / savepoint / etc).
OneInputStreamTask(Environment env, TimerService timeProvider) Constructor for initialization, possibly with initial state (recovery / savepoint / etc).

Method Summary

Modifier and Type	Method and Description
protected Optional<CheckpointBarrierHandler>	getCheckpointBarrierHandler() Acquires the optional CheckpointBarrierHandler associated with this stream task.
void	init()

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

abortCheckpointOnBarrier, advanceToEndOfEventTime, afterInvoke, cancel, cancelTask, cleanUp, cleanUpInternal, createRecordWriterDelegate, createStreamTaskStateInitializer, declineCheckpoint, dispatchOperatorEvent, endData, finalize, getAsyncCheckpointStartDelayNanos, getAsyncOperationsThreadPool, getCancelables, getCanEmitBatchOfRecords, getCheckpointStorage, getCompletionFuture, getConfiguration, getEnvironment, getMailboxExecutorFactory, getName, getProcessingTimeServiceFactory, handleAsyncException, invoke, isCanceled, isFailing, isMailboxLoopRunning, isRunning, isUsingNonBlockingInput, maybeInterruptOnCancel, notifyCheckpointAbortAsync, notifyCheckpointCompleteAsync, notifyCheckpointSubsumedAsync, notifyEndOfData, processInput, restore, runMailboxLoop, runMailboxStep, setSynchronousSavepoint, setupNumRecordsInCounter, toString, triggerCheckpointAsync, triggerCheckpointOnBarrier

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.streaming.runtime.tasks.ContainingTaskDetails

getExecutionConfig, getIndexInSubtaskGroup, getJobConfiguration, getUserCodeClassLoader

Constructor Detail

OneInputStreamTask

public OneInputStreamTask(Environment env)
                   throws Exception

Constructor for initialization, possibly with initial state (recovery / savepoint / etc).

Parameters:

env - The task environment for this task.

Throws:

Exception

OneInputStreamTask

@VisibleForTesting
public OneInputStreamTask(Environment env,
                                             @Nullable
                                             TimerService timeProvider)
                                      throws Exception

Constructor for initialization, possibly with initial state (recovery / savepoint / etc).

This constructor accepts a special TimerService. By default (and if null is passes for the time provider) a DefaultTimerService will be used.

Parameters:

env - The task environment for this task.

timeProvider - Optionally, a specific time provider to use.

Throws:

Exception

Method Detail

init

public void init()
          throws Exception

Specified by:

init in class StreamTask<OUT,OneInputStreamOperator<IN,OUT>>

Throws:

Exception

getCheckpointBarrierHandler

protected Optional<CheckpointBarrierHandler> getCheckpointBarrierHandler()

Description copied from class: StreamTask

Acquires the optional CheckpointBarrierHandler associated with this stream task. The CheckpointBarrierHandler should exist if the task has data inputs and requires to align the barriers.

Overrides:

getCheckpointBarrierHandler in class StreamTask<OUT,OneInputStreamOperator<IN,OUT>>