ml.shifu.guagua.master
类 AsyncMasterCoordinator<MASTER_RESULT extends Bytable,WORKER_RESULT extends Bytable>

java.lang.Object
  ml.shifu.guagua.BasicCoordinator<MASTER_RESULT,WORKER_RESULT>
      ml.shifu.guagua.master.AbstractMasterCoordinator<MASTER_RESULT,WORKER_RESULT>
          ml.shifu.guagua.master.AsyncMasterCoordinator<MASTER_RESULT,WORKER_RESULT>

类型参数：

MASTER_RESULT - master result for computation in each iteration.

WORKER_RESULT - worker result for computation in each iteration.

所有已实现的接口：

MasterInterceptor<MASTER_RESULT,WORKER_RESULT>, org.apache.zookeeper.Watcher

public class AsyncMasterCoordinator<MASTER_RESULT extends Bytable,WORKER_RESULT extends Bytable>
extends AbstractMasterCoordinator<MASTER_RESULT,WORKER_RESULT>

AsyncMasterCoordinator is used to as a barrier for each iteration.

For each iteration, AsyncMasterCoordinator will wait until all workers are done.

To start a new iteration, AsyncMasterCoordinator will write a znode for each iteration like '/_guagua/job_201312041304_189025/master/{currentIteration}' with with MasterComputable result as its data. This is like a signal to notify workers.

Workers are waiting on current master znode, if got current master znode, it will start another iteration.

嵌套类摘要

从类 ml.shifu.guagua.master.AbstractMasterCoordinator 继承的嵌套类/接口

AbstractMasterCoordinator.FailOverCommand, AbstractMasterCoordinator.MasterElectionCommand

从类 ml.shifu.guagua.BasicCoordinator 继承的嵌套类/接口

BasicCoordinator.BasicCoordinatorCommand, BasicCoordinator.CoordinatorCommand, BasicCoordinator.RetryCoordinatorCommand

从接口 org.apache.zookeeper.Watcher 继承的嵌套类/接口

org.apache.zookeeper.Watcher.Event

字段摘要

protected ProgressLock	workerInitLock Lock is used to check register info from all workers.
protected ProgressLock	workerIterationLock Lock is used to check iteration info from all workers.

从类 ml.shifu.guagua.BasicCoordinator 继承的字段

WAIT_SLOT_MILLS

构造方法摘要

AsyncMasterCoordinator()

方法摘要

String	getAppId()
int	getCurrentIteration()
void	preApplication(MasterContext<MASTER_RESULT,WORKER_RESULT> context) The hook point before any computation logic.
void	preIteration(MasterContext<MASTER_RESULT,WORKER_RESULT> context) The hook point before computation of each iteration.
void	process(org.apache.zookeeper.WatchedEvent event)
void	setAppId(String appId)
void	setCurrentIteration(int currentIteration)

从类 ml.shifu.guagua.master.AbstractMasterCoordinator 继承的方法

getMyBid, isAllWorkersHalt, postApplication, postIteration, setMyBid, setWorkerResults, updateMasterHaltStatus

从类 ml.shifu.guagua.BasicCoordinator 继承的方法

checkAndSetZooKeeper, closeZooKeeper, getAppNode, getBaseMasterElectionNode, getBytesFromZNode, getCurrentMasterNode, getCurrentMasterSplitNode, getCurrentWorkerNode, getCurrentWorkerSplitNode, getLastMasterNode, getLastWorkerNode, getMasterBaseNode, getMasterElectionNode, getMasterNode, getMasterSerializer, getRootNode, getSleepTime, getWorkerBaseNode, getWorkerBaseNode, getWorkerNode, getWorkerSerializer, getZkConnLatch, getZooKeeper, initialize, isFixedTime, setBytesToZNode, setFixedTime, setMasterSerializer, setSleepTime, setWorkerSerializer, setZooKeeper, startHeartbeat, stopHeartBeat

从类 java.lang.Object 继承的方法

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

字段详细信息

workerInitLock

protected ProgressLock workerInitLock

Lock is used to check register info from all workers.

workerIterationLock

protected ProgressLock workerIterationLock

Lock is used to check iteration info from all workers.

构造方法详细信息

AsyncMasterCoordinator

public AsyncMasterCoordinator()

方法详细信息

process

public void process(org.apache.zookeeper.WatchedEvent event)

指定者：

接口 org.apache.zookeeper.Watcher 中的 process

覆盖：

类 BasicCoordinator<MASTER_RESULT extends Bytable,WORKER_RESULT extends Bytable> 中的 process

getCurrentIteration

public int getCurrentIteration()

setCurrentIteration

public void setCurrentIteration(int currentIteration)

getAppId

public String getAppId()

setAppId

public void setAppId(String appId)

preApplication

public void preApplication(MasterContext<MASTER_RESULT,WORKER_RESULT> context)

从接口 MasterInterceptor 复制的描述

The hook point before any computation logic.

参数：

context - the master context instance which includes worker results and other useful parameters.

preIteration

public void preIteration(MasterContext<MASTER_RESULT,WORKER_RESULT> context)

从接口 MasterInterceptor 复制的描述

The hook point before computation of each iteration.

参数：

context - the master context instance which includes worker results and other useful parameters.