/*
* JBoss, Home of Professional Open Source
* Copyright 2006, JBoss Inc., and others contributors as indicated
* by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* (C) 2005-2010
*/
package org.jboss.internal.soa.esb.services.rules;
import org.apache.log4j.Logger;
import org.drools.SystemEventListener;
import org.drools.SystemEventListenerFactory;
import org.drools.agent.impl.PrintStreamSystemEventListener;
import org.drools.core.util.DelegatingSystemEventListener;
import org.drools.io.ResourceChangeScanner;
import org.drools.io.ResourceChangeScannerConfiguration;
import org.drools.io.ResourceFactory;
import org.jboss.soa.esb.common.Configuration;
import org.jboss.system.ServiceMBeanSupport;
/**
* DroolsResourceChangeService.
*
* @author dward at jboss.org
*/
public class DroolsResourceChangeService extends ServiceMBeanSupport implements DroolsResourceChangeServiceMBean
{
private static final Logger logger = Logger.getLogger(DroolsResourceChangeService.class);
private static final String DROOLS_RESOURCE_SCANNER_INTERVAL = "drools.resource.scanner.interval";
private SystemEventListener originalSystemEventListener = null;
@Override
protected void startService() throws Exception
{
// ORDER IS IMPORTANT!
// 1) set the system event listener to our implementation
originalSystemEventListener = SystemEventListenerFactory.getSystemEventListener();
if (originalSystemEventListener == null || originalSystemEventListener instanceof DelegatingSystemEventListener)
{
// We need to check for DelegatingSystemEventListener so we don't get a
// StackOverflowError when we set it back. If it is a DelegatingSystemEventListener,
// we instead use what drools wraps by default, which is PrintStreamSystemEventListener.
// Refer to org.drools.impl.SystemEventListenerServiceImpl for more information.
originalSystemEventListener = new PrintStreamSystemEventListener();
}
SystemEventListenerFactory.setSystemEventListener(new LogSystemEventListener());
// 2) start the notifier
ResourceFactory.getResourceChangeNotifierService().start();
// 3) start the scanner
ResourceChangeScanner rcs = ResourceFactory.getResourceChangeScannerService();
ResourceChangeScannerConfiguration rcs_conf = rcs.newResourceChangeScannerConfiguration();
String rulesResourceScannerInterval = Configuration.getRulesResourceScannerInterval();
if (logger.isInfoEnabled())
{
logger.info("setting " + DROOLS_RESOURCE_SCANNER_INTERVAL + " to " + rulesResourceScannerInterval);
}
rcs_conf.setProperty(DROOLS_RESOURCE_SCANNER_INTERVAL, rulesResourceScannerInterval);
rcs.configure(rcs_conf);
rcs.start();
// 4) start the super
super.startService();
}
@Override
protected void stopService() throws Exception
{
// ORDER IS IMPORTANT!
// 1) stop the scanner
ResourceFactory.getResourceChangeScannerService().stop();
// 2) stop the notifier
ResourceFactory.getResourceChangeNotifierService().stop();
// 3) set the system event listener back to the original implementation
SystemEventListenerFactory.setSystemEventListener(originalSystemEventListener);
// 4) stop the super
super.stopService();
}
}