Package fr.ens.biologie.genomique.eoulsan.util.locker

Class ZooKeeperLocker

java.lang.Object

fr.ens.biologie.genomique.eoulsan.util.locker.ZooKeeperLocker

All Implemented Interfaces:

Locker, org.apache.zookeeper.Watcher

public class ZooKeeperLocker
extends Object
implements Locker, org.apache.zookeeper.Watcher

This class implements a locker using Zookeeper. See @see blog post.

Since:

2.0

Author:

Laurent Jourdren

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.zookeeper.Watcher

org.apache.zookeeper.Watcher.Event

Constructor Summary

Constructors

Constructor	Description
ZooKeeperLocker(String connectString, int sessionTimeout, String lockBasePath, String lockName)	Public constructor.
ZooKeeperLocker(String connectString, int sessionTimeout, String lockBasePath, String lockName, boolean sequentialLockName)	Public constructor.

Method Summary

Modifier and Type	Method	Description
void	lock()	Wait the token and then lock the resource.
void	process(org.apache.zookeeper.WatchedEvent event)
void	unlock()	Unlock the resource.

Methods inherited from class java.lang.Object

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

Constructor Details

ZooKeeperLocker

public ZooKeeperLocker(String connectString,
 int sessionTimeout,
 String lockBasePath,
 String lockName)
                throws IOException

Public constructor.

Parameters:

connectString - Zookeeper connection string

sessionTimeout - session time out

lockBasePath - lock base path

lockName - lock name

Throws:

IOException - if an error occurs while creating the ZooKeeper connection

ZooKeeperLocker

public ZooKeeperLocker(String connectString,
 int sessionTimeout,
 String lockBasePath,
 String lockName,
 boolean sequentialLockName)
                throws IOException

Public constructor.

Parameters:

connectString - Zookeeper connection string

sessionTimeout - session time out

lockBasePath - lock base path

lockName - lock name

sequentialLockName - sequential lock

Throws:

IOException - if an error occurs while creating the ZooKeeper connection

Method Details

lock

public void lock()
          throws IOException

Description copied from interface: Locker

Wait the token and then lock the resource.

Specified by:

lock in interface Locker

Throws:

IOException - if an error occurs while locking the resource

unlock

public void unlock()
            throws IOException

Description copied from interface: Locker

Unlock the resource.

Specified by:

unlock in interface Locker

Throws:

IOException - if an error occurs while unlocking the resource

process

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

Specified by:

process in interface org.apache.zookeeper.Watcher