stomp.jdo.distributed
Class StaticJDOCache

java.lang.Object
  |
  +--stomp.jdo.distributed.StaticJDOCache

public class StaticJDOCache

extends java.lang.Object

a singleton class that handles distributing object refresh and object deleted calls to clients.

Author:

Eric Lindauer

Constructor Summary

StaticJDOCache()

Method Summary

static void	addClientCache(CacheListener listener)
static void	idsDeleted(java.util.Collection deletedIds, CacheListener originator) notifies all registered clients that the given set of ids have been deleted from the db.
static void	refreshAll(java.util.Collection objectIds, CacheListener originator) this method is not synchronized as it would become very deadlock-prone.

Methods inherited from class java.lang.Object

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

Constructor Detail

StaticJDOCache

public StaticJDOCache()

Method Detail

addClientCache

public static void addClientCache(CacheListener listener)

idsDeleted

public static void idsDeleted(java.util.Collection deletedIds,
                              CacheListener originator)

notifies all registered clients that the given set of ids have been deleted from the db.

refreshAll

public static void refreshAll(java.util.Collection objectIds,
                              CacheListener originator)

this method is not synchronized as it would become very deadlock-prone. Imagine a client that responds to one object changing by changing another persistent object. This would result in a callback to this object to refresh, which would run into the lock already obtained earlier ( the remote-ness of the calls masks the fact that we are still in the same "thread", tricking java's synchronization mechanism ).