/*-
 * ============LICENSE_START=======================================================
 * ECOMP Policy Engine
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.policy.pypdp.jmx;

import java.lang.management.ManagementFactory;

import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.openecomp.policy.common.logging.flexlogger.FlexLogger;
import org.openecomp.policy.common.logging.flexlogger.Logger;

@WebListener
public class PyPdpMBeanListener implements ServletContextListener {
	private static final String JMX_OBJECT_NAME = "PyPdp:type=PyPdpMonitor";
//	private static final Log logger	= LogFactory.getLog(PyPdpMBeanListener.class);
	private static final Logger logger = FlexLogger.getLogger(PyPdpMBeanListener.class);
	
	private ObjectName objectName;

	@Override
	public void contextInitialized(ServletContextEvent contextEvent) {
        if (logger.isInfoEnabled())
        	logger.info("Registering.");
        
        final MBeanServer server = ManagementFactory.getPlatformMBeanServer();
        try {
            objectName = new ObjectName(JMX_OBJECT_NAME);
            server.registerMBean(PyPdpMonitor.singleton, objectName);
            logger.info("MBean registered: " + objectName);
        } catch (Exception e) {
            logger.warn(e.getMessage(), e);
        }
	}
	
	@Override
	public void contextDestroyed(ServletContextEvent arg0) {
		if (logger.isInfoEnabled())
			logger.info("Unregistering");
        final MBeanServer server = ManagementFactory.getPlatformMBeanServer();
        try {
            objectName = new ObjectName(JMX_OBJECT_NAME);
            server.unregisterMBean(objectName);
            if (logger.isInfoEnabled())
            	logger.info("MBean unregistered: " + objectName);
        } catch (Exception e) {
            logger.warn(e.getMessage(), e);
        }
	}

}