ml.shifu.guagua.master

Class AbstractMasterCoordinator.FailOverCommand

java.lang.Object

ml.shifu.guagua.BasicCoordinator.BasicCoordinatorCommand

ml.shifu.guagua.master.AbstractMasterCoordinator.FailOverCommand

All Implemented Interfaces:

BasicCoordinator.CoordinatorCommand

Enclosing class:

AbstractMasterCoordinator<MASTER_RESULT extends Bytable,WORKER_RESULT extends Bytable>

protected class AbstractMasterCoordinator.FailOverCommand
extends BasicCoordinator.BasicCoordinatorCommand

AbstractMasterCoordinator.FailOverCommand is used to read last iteration before task failed.

To read last iteration, just read all iterations from master znodes and get the maximal one.

Master znodes should be set as persistent type.

Constructor Summary

Constructors

Constructor and Description
FailOverCommand(MasterContext<MASTER_RESULT,WORKER_RESULT> context)

Method Summary

Modifier and Type	Method and Description
void	doExecute() Real method to do coordinator operation.

Methods inherited from class ml.shifu.guagua.BasicCoordinator.BasicCoordinatorCommand

execute

Methods inherited from class java.lang.Object

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

Constructor Detail

FailOverCommand

public FailOverCommand(MasterContext<MASTER_RESULT,WORKER_RESULT> context)

Method Detail

doExecute

public void doExecute()
               throws org.apache.zookeeper.KeeperException,
                      InterruptedException

Description copied from class: BasicCoordinator.BasicCoordinatorCommand

Real method to do coordinator operation.

Specified by:

doExecute in class BasicCoordinator.BasicCoordinatorCommand

Throws:

org.apache.zookeeper.KeeperException

InterruptedException