org.apache.flink.streaming.runtime.tasks

类 OperatorChain<OUT,OP extends StreamOperator<OUT>>

java.lang.Object

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

类型参数:

OUT - The type of elements accepted by the chain, i.e., the input type of the chain's head operator.

所有已实现的接口:

StreamStatusMaintainer, StreamStatusProvider

@Internal
public class OperatorChain<OUT,OP extends StreamOperator<OUT>>
extends Object
implements StreamStatusMaintainer

The OperatorChain contains all operators that are executed as one chain within a single StreamTask.

嵌套类概要

嵌套类

限定符和类型	类和说明
static interface	OperatorChain.WatermarkGaugeExposingOutput<T> An Output that measures the last emitted watermark with a WatermarkGauge.

构造器概要

构造器

构造器和说明
OperatorChain(StreamTask<OUT,OP> containingTask, org.apache.flink.runtime.io.network.api.writer.RecordWriterDelegate<org.apache.flink.runtime.plugable.SerializationDelegate<StreamRecord<OUT>>> recordWriterDelegate)

方法概要

限定符和类型	方法和说明
void	broadcastEvent(org.apache.flink.runtime.event.AbstractEvent event)
void	broadcastEvent(org.apache.flink.runtime.event.AbstractEvent event, boolean isPriorityEvent)
protected void	closeOperators(StreamTaskActionExecutor actionExecutor) Closes all operators in a chain effect way.
void	dispatchOperatorEvent(org.apache.flink.runtime.jobgraph.OperatorID operator, org.apache.flink.util.SerializedValue<org.apache.flink.runtime.operators.coordination.OperatorEvent> event)
void	endHeadOperatorInput(int inputId) Ends the head operator input specified by inputId).
void	flushOutputs() This method should be called before finishing the record emission, to make sure any data that is still buffered will be sent.
Iterable<StreamOperatorWrapper<?,?>>	getAllOperators() Returns an Iterable which traverses all operators in forward topological order.
Iterable<StreamOperatorWrapper<?,?>>	getAllOperators(boolean reverse) Returns an Iterable which traverses all operators in forward or reverse topological order.
OperatorChain.WatermarkGaugeExposingOutput<StreamRecord<OUT>>	getChainEntryPoint()
OP	getHeadOperator()
int	getNumberOfOperators()
org.apache.flink.runtime.operators.coordination.OperatorEventDispatcher	getOperatorEventDispatcher()
RecordWriterOutput<?>[]	getStreamOutputs()
StreamStatus	getStreamStatus() Returns the current stream status.
protected void	initializeStateAndOpenOperators(StreamTaskStateInitializer streamTaskStateInitializer) Initialize state and open all operators in the chain from tail to head, contrary to StreamOperator.close() which happens head to tail (see closeOperators(StreamTaskActionExecutor)).
void	prepareSnapshotPreBarrier(long checkpointId)
void	releaseOutputs() This method releases all resources of the record writer output.
void	setIgnoreEndOfInput(boolean ignoreEndOfInput)
void	toggleStreamStatus(StreamStatus status) Toggles the current stream status.

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

OperatorChain

public OperatorChain(StreamTask<OUT,OP> containingTask,
                     org.apache.flink.runtime.io.network.api.writer.RecordWriterDelegate<org.apache.flink.runtime.plugable.SerializationDelegate<StreamRecord<OUT>>> recordWriterDelegate)

方法详细资料

getStreamStatus

public StreamStatus getStreamStatus()

从接口复制的说明: StreamStatusProvider

Returns the current stream status.

指定者:

getStreamStatus 在接口中 StreamStatusProvider

返回:

current stream status.

getOperatorEventDispatcher

public org.apache.flink.runtime.operators.coordination.OperatorEventDispatcher getOperatorEventDispatcher()

dispatchOperatorEvent

public void dispatchOperatorEvent(org.apache.flink.runtime.jobgraph.OperatorID operator,
                                  org.apache.flink.util.SerializedValue<org.apache.flink.runtime.operators.coordination.OperatorEvent> event)
                           throws org.apache.flink.util.FlinkException

抛出:

org.apache.flink.util.FlinkException

toggleStreamStatus

public void toggleStreamStatus(StreamStatus status)

从接口复制的说明: StreamStatusMaintainer

Toggles the current stream status. This method should only have effect if the supplied stream status is different from the current status.

指定者:

toggleStreamStatus 在接口中 StreamStatusMaintainer

参数:

status - the new status to toggle to

broadcastEvent

public void broadcastEvent(org.apache.flink.runtime.event.AbstractEvent event)
                    throws IOException

抛出:

IOException

broadcastEvent

public void broadcastEvent(org.apache.flink.runtime.event.AbstractEvent event,
                           boolean isPriorityEvent)
                    throws IOException

抛出:

IOException

prepareSnapshotPreBarrier

public void prepareSnapshotPreBarrier(long checkpointId)
                               throws Exception

抛出:

Exception

endHeadOperatorInput

public void endHeadOperatorInput(int inputId)
                          throws Exception

Ends the head operator input specified by inputId).

参数:

inputId - the input ID starts from 1 which indicates the first input.

抛出:

Exception

initializeStateAndOpenOperators

protected void initializeStateAndOpenOperators(StreamTaskStateInitializer streamTaskStateInitializer)
                                        throws Exception

Initialize state and open all operators in the chain from tail to head, contrary to StreamOperator.close() which happens head to tail (see closeOperators(StreamTaskActionExecutor)).

抛出:

Exception

closeOperators

protected void closeOperators(StreamTaskActionExecutor actionExecutor)
                       throws Exception

Closes all operators in a chain effect way. Closing happens from head to tail operator in the chain, contrary to StreamOperator.open() which happens tail to head (see initializeStateAndOpenOperators(StreamTaskStateInitializer)).

抛出:

Exception

getStreamOutputs

public RecordWriterOutput<?>[] getStreamOutputs()

getAllOperators

public Iterable<StreamOperatorWrapper<?,?>> getAllOperators()

Returns an Iterable which traverses all operators in forward topological order.

getAllOperators

public Iterable<StreamOperatorWrapper<?,?>> getAllOperators(boolean reverse)

Returns an Iterable which traverses all operators in forward or reverse topological order.

getNumberOfOperators

public int getNumberOfOperators()

getChainEntryPoint

public OperatorChain.WatermarkGaugeExposingOutput<StreamRecord<OUT>> getChainEntryPoint()

flushOutputs

public void flushOutputs()
                  throws IOException

This method should be called before finishing the record emission, to make sure any data that is still buffered will be sent. It also ensures that all data sending related exceptions are recognized.

抛出:

IOException - Thrown, if the buffered data cannot be pushed into the output streams.

releaseOutputs

public void releaseOutputs()

This method releases all resources of the record writer output. It stops the output flushing thread (if there is one) and releases all buffers currently held by the output serializers.

This method should never fail.

getHeadOperator

@Nullable
public OP getHeadOperator()

setIgnoreEndOfInput

public void setIgnoreEndOfInput(boolean ignoreEndOfInput)