ml.shifu.guagua.worker
类 SyncWorkerCoordinator<MASTER_RESULT extends Bytable,WORKER_RESULT extends Bytable>

java.lang.Object
  ml.shifu.guagua.BasicCoordinator<MASTER_RESULT,WORKER_RESULT>
      ml.shifu.guagua.worker.AbstractWorkerCoordinator<MASTER_RESULT,WORKER_RESULT>
          ml.shifu.guagua.worker.SyncWorkerCoordinator<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：

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

public class SyncWorkerCoordinator<MASTER_RESULT extends Bytable,WORKER_RESULT extends Bytable>
extends AbstractWorkerCoordinator<MASTER_RESULT,WORKER_RESULT>

SyncWorkerCoordinator is used to as a worker barrier for each iteration.

For each iteration, SyncWorkerCoordinator will wait until master's signal.

To start a new iteration, SyncMasterCoordinator will write a znode for each iteration like '/_guagua/job_201312041304_189025/master/{currentIteration}' with with MasterComputable result as its data. SyncWorkerCoordinator is trying to detect whether it exists, if yes, to start a new iteration.

Worker result will be written into each worker iteration znode for master to get.

嵌套类摘要

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

AbstractWorkerCoordinator.FailOverCoordinatorCommand

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

SyncWorkerCoordinator()

方法摘要

void	postIteration(WorkerContext<MASTER_RESULT,WORKER_RESULT> context) The hook point after computation of each iteration.
void	preApplication(WorkerContext<MASTER_RESULT,WORKER_RESULT> context) The hook point before any computation logic.

从类 ml.shifu.guagua.worker.AbstractWorkerCoordinator 继承的方法

postApplication, preIteration, setMasterResult

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

构造方法详细信息

SyncWorkerCoordinator

public SyncWorkerCoordinator()

方法详细信息

preApplication

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

从接口 WorkerInterceptor 复制的描述

The hook point before any computation logic.

参数：

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

postIteration

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

从接口 WorkerInterceptor 复制的描述

The hook point after computation of each iteration.

参数：

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