org.apache.flink.runtime.checkpoint

类 ZooKeeperCheckpointIDCounter

java.lang.Object

org.apache.flink.runtime.checkpoint.ZooKeeperCheckpointIDCounter

所有已实现的接口:

CheckpointIDCounter

public class ZooKeeperCheckpointIDCounter
extends Object
implements CheckpointIDCounter

CheckpointIDCounter instances for JobManagers running in HighAvailabilityMode.ZOOKEEPER.

Each counter creates a ZNode:

 +----O /flink/checkpoint-counter/<job-id> 1 [persistent]
 .
 .
 .
 +----O /flink/checkpoint-counter/<job-id> N [persistent]
 

The checkpoints IDs are required to be ascending (per job). In order to guarantee this in case of job manager failures we use ZooKeeper to have a shared counter across job manager instances.

字段概要

从接口继承的字段 org.apache.flink.runtime.checkpoint.CheckpointIDCounter

INITIAL_CHECKPOINT_ID

构造器概要

构造器

构造器和说明
ZooKeeperCheckpointIDCounter(org.apache.flink.shaded.curator4.org.apache.curator.framework.CuratorFramework client, LastStateConnectionStateListener connectionStateListener) Creates a ZooKeeperCheckpointIDCounter instance.

方法概要

限定符和类型	方法和说明
long	get() Atomically gets the current checkpoint ID.
long	getAndIncrement() Atomically increments the current checkpoint ID.
void	setCount(long newId) Sets the current checkpoint ID.
void	shutdown(org.apache.flink.api.common.JobStatus jobStatus) Shuts the CheckpointIDCounter service.
void	start() Starts the CheckpointIDCounter service down.

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

ZooKeeperCheckpointIDCounter

public ZooKeeperCheckpointIDCounter(org.apache.flink.shaded.curator4.org.apache.curator.framework.CuratorFramework client,
                                    LastStateConnectionStateListener connectionStateListener)

Creates a ZooKeeperCheckpointIDCounter instance.

参数:

client - Curator ZooKeeper client

方法详细资料

start

public void start()
           throws Exception

从接口复制的说明: CheckpointIDCounter

Starts the CheckpointIDCounter service down.

指定者:

start 在接口中 CheckpointIDCounter

抛出:

Exception

shutdown

public void shutdown(org.apache.flink.api.common.JobStatus jobStatus)
              throws Exception

从接口复制的说明: CheckpointIDCounter

Shuts the CheckpointIDCounter service.

The job status is forwarded and used to decide whether state should actually be discarded or kept.

指定者:

shutdown 在接口中 CheckpointIDCounter

参数:

jobStatus - Job state on shut down

抛出:

Exception

getAndIncrement

public long getAndIncrement()
                     throws Exception

从接口复制的说明: CheckpointIDCounter

Atomically increments the current checkpoint ID.

指定者:

getAndIncrement 在接口中 CheckpointIDCounter

返回:

The previous checkpoint ID

抛出:

Exception

get

public long get()

从接口复制的说明: CheckpointIDCounter

Atomically gets the current checkpoint ID.

指定者:

get 在接口中 CheckpointIDCounter

返回:

The current checkpoint ID

setCount

public void setCount(long newId)
              throws Exception

从接口复制的说明: CheckpointIDCounter

Sets the current checkpoint ID.

指定者:

setCount 在接口中 CheckpointIDCounter

参数:

newId - The new ID

抛出:

Exception