org.apache.flink.state.api.output

Class BootstrapStreamTaskRunner<IN>

java.lang.Object

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

org.apache.flink.state.api.output.BootstrapStreamTaskRunner<IN>

Type Parameters:

IN - Type of the input to the partition

All Implemented Interfaces:

Serializable, CheckpointListener, BoundedOneInput, Input<IN>, KeyContext, KeyContextHandler, OneInputStreamOperator<IN,TaggedOperatorSubtaskState>, SetupableStreamOperator<TaggedOperatorSubtaskState>, StreamOperator<TaggedOperatorSubtaskState>, StreamOperatorStateHandler.CheckpointedStreamOperator

@Internal
public class BootstrapStreamTaskRunner<IN>
extends AbstractStreamOperator<TaggedOperatorSubtaskState>
implements OneInputStreamOperator<IN,TaggedOperatorSubtaskState>, BoundedOneInput

The runtime for a BootstrapStreamTask.

The task is executed processing the data in a particular partition instead of the pulling from the network stack. After all data has been processed the runner will output the OperatorSubtaskState from the snapshot of the bounded task.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

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

Constructor Summary

Constructors

Constructor and Description
BootstrapStreamTaskRunner(StreamConfig streamConfig, int maxParallelism) Create a new BootstrapStreamTaskRunner.

Method Summary

Modifier and Type	Method and Description
void	endInput() It is notified that no more data will arrive from the input.
void	open() This method is called immediately before any elements are processed, it should contain the operator's initialization logic, e.g. state initialization.
void	processElement(StreamRecord<IN> element) Processes one element that arrived on this input of the MultipleInputStreamOperator.

Methods inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

close, finish, getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setProcessingTimeService, setup, snapshotState, snapshotState

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.streaming.api.operators.OneInputStreamOperator

setKeyContextElement

Methods inherited from interface org.apache.flink.streaming.api.operators.StreamOperator

close, finish, getMetricGroup, getOperatorID, initializeState, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState

Methods inherited from interface org.apache.flink.api.common.state.CheckpointListener

notifyCheckpointAborted, notifyCheckpointComplete

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContext

getCurrentKey, setCurrentKey

Methods inherited from interface org.apache.flink.streaming.api.operators.Input

processLatencyMarker, processWatermark, processWatermarkStatus

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContextHandler

hasKeyContext

Constructor Detail

BootstrapStreamTaskRunner

public BootstrapStreamTaskRunner(StreamConfig streamConfig,
                                 int maxParallelism)

Create a new BootstrapStreamTaskRunner.

Parameters:

streamConfig - The internal configuration for the task.

maxParallelism - The max parallelism of the operator.

Method Detail

open

public void open()
          throws Exception

Description copied from class: AbstractStreamOperator

This method is called immediately before any elements are processed, it should contain the operator's initialization logic, e.g. state initialization.

The default implementation does nothing.

Specified by:

open in interface StreamOperator<TaggedOperatorSubtaskState>

Overrides:

open in class AbstractStreamOperator<TaggedOperatorSubtaskState>

Throws:

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

processElement

public void processElement(StreamRecord<IN> element)
                    throws Exception

Description copied from interface: Input

Processes one element that arrived on this input of the MultipleInputStreamOperator. This method is guaranteed to not be called concurrently with other methods of the operator.

Specified by:

processElement in interface Input<IN>

Throws:

Exception

endInput

public void endInput()
              throws Exception

Description copied from interface: BoundedOneInput

It is notified that no more data will arrive from the input.

WARNING: It is not safe to use this method to commit any transactions or other side effects! You can use this method to flush any buffered data that can later on be committed e.g. in a CheckpointListener.notifyCheckpointComplete(long).

NOTE: Given it is semantically very similar to the StreamOperator.finish() method. It might be dropped in favour of the other method at some point in time.

Specified by:

endInput in interface BoundedOneInput

Throws:

Exception