/* 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.diagnostic.*;
import com.db4o.events.*;
import com.db4o.internal.*;
import com.db4o.internal.config.*;
/**
* publishes statistics about Queries to JMX.
*/
@decaf.Ignore(unlessCompatible=decaf.Platform.JDK15)
public class QueryMonitoringSupport implements ConfigurationItem {
public void apply(InternalObjectContainer container) {
final Queries queries = Db4oMBeans.newQueriesMBean(container);
final CommonConfiguration config = Db4oLegacyConfigurationBridge.asCommonConfiguration(container.configure());
config.diagnostic().addListener(new DiagnosticListener() {
public void onDiagnostic(Diagnostic d) {
if (d instanceof LoadedFromClassIndex) {
queries.notifyClassIndexScan((LoadedFromClassIndex)d);
}
}
});
final EventRegistry events = EventRegistryFactory.forObjectContainer(container);
events.queryStarted().addListener(new EventListener4<QueryEventArgs>() {
public void onEvent(Event4<QueryEventArgs> e, QueryEventArgs args) {
queries.notifyQueryStarted();
}
});
events.queryFinished().addListener(new EventListener4<QueryEventArgs>() {
public void onEvent(Event4<QueryEventArgs> e, QueryEventArgs args) {
queries.notifyQueryFinished();
}
});
}
public void prepare(Configuration configuration) {
}
}