org.apache.flink.streaming.runtime.io

类 CheckpointedInputGate

java.lang.Object

org.apache.flink.streaming.runtime.io.CheckpointedInputGate

所有已实现的接口:

org.apache.flink.runtime.io.AvailabilityProvider, org.apache.flink.runtime.io.PullingAsyncDataInput<org.apache.flink.runtime.io.network.partition.consumer.BufferOrEvent>

@Internal
public class CheckpointedInputGate
extends Object
implements org.apache.flink.runtime.io.PullingAsyncDataInput<org.apache.flink.runtime.io.network.partition.consumer.BufferOrEvent>

The CheckpointedInputGate uses CheckpointBarrierHandler to handle incoming CheckpointBarrier from the InputGate.

嵌套类概要

从接口继承的嵌套类/接口 org.apache.flink.runtime.io.AvailabilityProvider

org.apache.flink.runtime.io.AvailabilityProvider.AvailabilityHelper

字段概要

从接口继承的字段 org.apache.flink.runtime.io.AvailabilityProvider

AVAILABLE

构造器概要

构造器

构造器和说明
CheckpointedInputGate(org.apache.flink.runtime.io.network.partition.consumer.InputGate inputGate, BufferStorage bufferStorage, CheckpointBarrierHandler barrierHandler)
CheckpointedInputGate(org.apache.flink.runtime.io.network.partition.consumer.InputGate inputGate, BufferStorage bufferStorage, CheckpointBarrierHandler barrierHandler, int channelIndexOffset) Creates a new checkpoint stream aligner.
CheckpointedInputGate(org.apache.flink.runtime.io.network.partition.consumer.InputGate inputGate, BufferStorage bufferStorage, String taskName, org.apache.flink.runtime.jobgraph.tasks.AbstractInvokable toNotifyOnCheckpoint)

方法概要

限定符和类型	方法和说明
void	cleanup() Cleans up all internally held resources.
long	getAlignmentDurationNanos() Gets the time that the latest alignment took, in nanoseconds.
CompletableFuture<?>	getAvailableFuture()
long	getLatestCheckpointId() Gets the ID defining the current pending, or just completed, checkpoint.
int	getNumberOfInputChannels()
boolean	isEmpty() Checks if the barrier handler has buffered any data internally.
boolean	isFinished()
Optional<org.apache.flink.runtime.io.network.partition.consumer.BufferOrEvent>	pollNext()
String	toString()

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.runtime.io.AvailabilityProvider

isApproximatelyAvailable, isAvailable

构造器详细资料

CheckpointedInputGate

public CheckpointedInputGate(org.apache.flink.runtime.io.network.partition.consumer.InputGate inputGate,
                             BufferStorage bufferStorage,
                             String taskName,
                             @Nullable
                             org.apache.flink.runtime.jobgraph.tasks.AbstractInvokable toNotifyOnCheckpoint)

CheckpointedInputGate

public CheckpointedInputGate(org.apache.flink.runtime.io.network.partition.consumer.InputGate inputGate,
                             BufferStorage bufferStorage,
                             CheckpointBarrierHandler barrierHandler)

CheckpointedInputGate

public CheckpointedInputGate(org.apache.flink.runtime.io.network.partition.consumer.InputGate inputGate,
                             BufferStorage bufferStorage,
                             CheckpointBarrierHandler barrierHandler,
                             int channelIndexOffset)

Creates a new checkpoint stream aligner.

The aligner will allow only alignments that buffer up to the given number of bytes. When that number is exceeded, it will stop the alignment and notify the task that the checkpoint has been cancelled.

参数:

inputGate - The input gate to draw the buffers and events from.

bufferStorage - The storage to hold the buffers and events for blocked channels.

barrierHandler - Handler that controls which channels are blocked.

channelIndexOffset - Optional offset added to channelIndex returned from the inputGate before passing it to the barrierHandler.

方法详细资料

getAvailableFuture

public CompletableFuture<?> getAvailableFuture()

指定者:

getAvailableFuture 在接口中 org.apache.flink.runtime.io.AvailabilityProvider

pollNext

public Optional<org.apache.flink.runtime.io.network.partition.consumer.BufferOrEvent> pollNext()
                                                                                        throws Exception

指定者:

pollNext 在接口中 org.apache.flink.runtime.io.PullingAsyncDataInput<org.apache.flink.runtime.io.network.partition.consumer.BufferOrEvent>

抛出:

Exception

isEmpty

public boolean isEmpty()

Checks if the barrier handler has buffered any data internally.

返回:

True, if no data is buffered internally, false otherwise.

isFinished

public boolean isFinished()

指定者:

isFinished 在接口中 org.apache.flink.runtime.io.PullingAsyncDataInput<org.apache.flink.runtime.io.network.partition.consumer.BufferOrEvent>

cleanup

public void cleanup()
             throws IOException

Cleans up all internally held resources.

抛出:

IOException - Thrown if the cleanup of I/O resources failed.

getLatestCheckpointId

public long getLatestCheckpointId()

Gets the ID defining the current pending, or just completed, checkpoint.

返回:

The ID of the pending of completed checkpoint.

getAlignmentDurationNanos

public long getAlignmentDurationNanos()

Gets the time that the latest alignment took, in nanoseconds. If there is currently an alignment in progress, it will return the time spent in the current alignment so far.

返回:

The duration in nanoseconds

getNumberOfInputChannels

public int getNumberOfInputChannels()

返回:

number of underlying input channels.

toString

public String toString()

覆盖:

toString 在类中 Object