atavism.server.util

Class ObjectLockManager

java.lang.Object

atavism.server.util.ObjectLockManager

public class ObjectLockManager
extends java.lang.Object

a map of oids to a lock. useful for locking an object when you dont have an entity. for example, in the proxyplugin, we want to make sure there are no other threads processing a request for a given oid, to avoid out of order processing. you must make sure you have only one objectlockmanager.

Author:

cedeno

Constructor Summary

Constructors

Constructor and Description
ObjectLockManager()

Method Summary

Modifier and Type	Method and Description
java.util.concurrent.locks.Lock	getLock(OID mobOid)
static void	lockAll(java.util.Collection<java.util.concurrent.locks.Lock> locks) Utility method that attempts to lock a set of peer locks.
static void	lockAll(java.util.concurrent.locks.Lock... locks) a wrapper around lockAll(Collection locks) to make it simple if you do not want to create a collection object
static boolean	tryLockAll(java.util.Collection<java.util.concurrent.locks.Lock> locks, long time) Utility method that attempts to lock a set of peer locks.
static void	unlockAll(java.util.Collection<java.util.concurrent.locks.Lock> locks) Utility method that releases a set of peer locks.

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectLockManager

public ObjectLockManager()

Method Detail

getLock

public java.util.concurrent.locks.Lock getLock(OID mobOid)

lockAll

public static void lockAll(java.util.concurrent.locks.Lock... locks)

a wrapper around lockAll(Collection locks) to make it simple if you do not want to create a collection object

Parameters:

locks -

lockAll

public static void lockAll(java.util.Collection<java.util.concurrent.locks.Lock> locks)

Utility method that attempts to lock a set of peer locks. It will attempt each lock, and back out if it is unable.

Parameters:

locks -

unlockAll

public static void unlockAll(java.util.Collection<java.util.concurrent.locks.Lock> locks)

Utility method that releases a set of peer locks.

Parameters:

locks -

tryLockAll

public static boolean tryLockAll(java.util.Collection<java.util.concurrent.locks.Lock> locks,
                                 long time)

Utility method that attempts to lock a set of peer locks. It will attempt each lock, and back out if it is unable. If the time limit is exceeded, it will return false, and all of the locks will have been released.

Parameters:

locks - - set of locks to acquire

time - - maximum amount of time to wait before giving up.