/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see http://www.gnu.org/licenses/. */
package com.db4o.monitoring;
import com.db4o.config.*;
import com.db4o.foundation.*;
import com.db4o.internal.*;
import com.db4o.internal.freespace.*;
import com.db4o.internal.slots.*;
/**
* Publishes statistics about freespace to JMX.
*/
@decaf.Ignore(unlessCompatible=decaf.Platform.JDK15)
public class FreespaceMonitoringSupport implements ConfigurationItem {
public void apply(InternalObjectContainer container) {
if(! (container instanceof LocalObjectContainer) || container.configImpl().isReadOnly()){
return;
}
LocalObjectContainer localObjectContainer = (LocalObjectContainer) container;
FreespaceManager freespaceManager = localObjectContainer.freespaceManager();
final Freespace freespace = Db4oMBeans.newFreespaceMBean(container);
freespaceManager.listener(freespace);
freespaceManager.traverse(new Visitor4<Slot>() {
public void visit(Slot slot) {
freespace.slotAdded(slot.length());
}
});
}
public void prepare(Configuration configuration) {
// do nothing
}
}