ml.shifu.guagua.master
类 AbstractMasterCoordinator<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>

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

直接已知子类：

AsyncMasterCoordinator, SyncMasterCoordinator

public abstract class AbstractMasterCoordinator<MASTER_RESULT extends Bytable,WORKER_RESULT extends Bytable>
extends BasicCoordinator<MASTER_RESULT,WORKER_RESULT>
implements MasterInterceptor<MASTER_RESULT,WORKER_RESULT>

AbstractMasterCoordinator has some common implementation for both async and sync worker coordinator.

Common functions include: znodes cleaning up, fail-over support and others.

嵌套类摘要

protected class	AbstractMasterCoordinator.FailOverCommand AbstractMasterCoordinator.FailOverCommand is used to read last iteration before task failed.
protected class	AbstractMasterCoordinator.MasterElectionCommand Elect master from several backup masters.

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

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

WAIT_SLOT_MILLS

构造方法摘要

AbstractMasterCoordinator()

方法摘要

String	getMyBid()
protected boolean	isAllWorkersHalt(Iterable<WORKER_RESULT> workerResults) Check whether all workers are halted.
void	postApplication(MasterContext<MASTER_RESULT,WORKER_RESULT> context) The hook point after any computation logic.
void	postIteration(MasterContext<MASTER_RESULT,WORKER_RESULT> context) The hook point after computation of each iteration.
void	setMyBid(String myBid)
protected void	setWorkerResults(MasterContext<MASTER_RESULT,WORKER_RESULT> context, String appCurrentWorkersNode, String appId, int iteration) Set worker results from znodes.
protected void	updateMasterHaltStatus(MasterContext<MASTER_RESULT,WORKER_RESULT> context) Check whether GuaguaConstants.GUAGUA_WORKER_HALT_ENABLE) is enabled, if yes, check whether all workers are halted and update master status.

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, process, 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

从接口 ml.shifu.guagua.master.MasterInterceptor 继承的方法

preApplication, preIteration

构造方法详细信息

AbstractMasterCoordinator

public AbstractMasterCoordinator()

方法详细信息

postIteration

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

从接口 MasterInterceptor 复制的描述

The hook point after computation of each iteration.

指定者：

接口 MasterInterceptor<MASTER_RESULT extends Bytable,WORKER_RESULT extends Bytable> 中的 postIteration

参数：

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

postApplication

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

从接口 MasterInterceptor 复制的描述

The hook point after any computation logic.

指定者：

接口 MasterInterceptor<MASTER_RESULT extends Bytable,WORKER_RESULT extends Bytable> 中的 postApplication

参数：

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

setWorkerResults

protected void setWorkerResults(MasterContext<MASTER_RESULT,WORKER_RESULT> context,
                                String appCurrentWorkersNode,
                                String appId,
                                int iteration)
                         throws org.apache.zookeeper.KeeperException,
                                InterruptedException

Set worker results from znodes.

抛出：

org.apache.zookeeper.KeeperException

InterruptedException

updateMasterHaltStatus

protected void updateMasterHaltStatus(MasterContext<MASTER_RESULT,WORKER_RESULT> context)

Check whether GuaguaConstants.GUAGUA_WORKER_HALT_ENABLE) is enabled, if yes, check whether all workers are halted and update master status.

isAllWorkersHalt

protected boolean isAllWorkersHalt(Iterable<WORKER_RESULT> workerResults)

Check whether all workers are halted.

getMyBid

public String getMyBid()

setMyBid

public void setMyBid(String myBid)