org.mmbase.clustering
Class ChangeManager

java.lang.Object
  org.mmbase.clustering.ChangeManager

public final class ChangeManager

extends Object

This utility class contains the methods for broadcasting/registering changes on nodes. It is available as 'getChangeManager()' from the StorageManagerFactory.

Version:

$Id: ChangeManager.java,v 1.12 2006/03/31 19:09:04 michiel Exp $

Author:

Pierre van Rooden

See Also:

StorageManagerFactory.getChangeManager()

Constructor Summary

ChangeManager()

Method Summary

void	commit(Map changes) Commit all changes stored in a Changes map.
void	commit(MMObjectNode node, String change) Commits the change to a node.

Methods inherited from class java.lang.Object

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

Constructor Detail

ChangeManager

public ChangeManager()

Method Detail

commit

public void commit(Map changes)

Commit all changes stored in a Changes map. Clears the change status of all changed nodes, then broadcasts changes to the nodes' builders.

Parameters:

changes - a map with node/change value pairs

commit

public void commit(MMObjectNode node,
                   String change)

Commits the change to a node. Fires the node change events through the EventManager. Then clears 'changed' state on the node.

Parameters:

node - the node to commit the change of

change - the type of change: "n": new, "c": commit, "d": delete, "r" : relation changed