01 /*
02 *
03 * Licensed to the Apache Software Foundation (ASF) under one
04 * or more contributor license agreements. See the NOTICE file
05 * distributed with this work for additional information
06 * regarding copyright ownership. The ASF licenses this file
07 * to you under the Apache License, Version 2.0 (the
08 * "License"); you may not use this file except in compliance
09 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 */
21 package org.apache.qpid.management.servlet;
22
23 import javax.servlet.ServletContext;
24 import javax.servlet.ServletContextEvent;
25 import javax.servlet.ServletContextListener;
26
27 import org.apache.qpid.management.Messages;
28 import org.apache.qpid.management.Names;
29 import org.apache.qpid.management.domain.services.QMan;
30 import org.apache.qpid.management.domain.services.StartupFailureException;
31 import org.apache.qpid.transport.util.Logger;
32
33 /**
34 * QMan JMX lifecycle manager.
35 * Provides lifecycle management of QMan JMX core including startup and shutdown.
36 *
37 * @author Andrea Gazzarini
38 */
39 public class QManLifeCycleManager implements ServletContextListener
40 {
41 private final static Logger LOGGER = Logger.get(QManLifeCycleManager.class);
42
43 /**
44 * Starts QMan JMX Core.
45 *
46 * @param event the application context event.
47 */
48 public void contextInitialized(ServletContextEvent event)
49 {
50 try
51 {
52 QMan qman = new QMan();
53 qman.start();
54 event.getServletContext().setAttribute(
55 Names.APPLICATION_NAME,
56 qman);
57 } catch (StartupFailureException exception)
58 {
59 LOGGER.error(
60 exception,
61 Messages.QMAN_100030_JMX_CORE_STARTUP_FAILURE);
62 }
63 }
64
65 /**
66 * Sutdown QMan JMX Core.
67 *
68 * @param event the application context event.
69 */
70 public void contextDestroyed(ServletContextEvent event)
71 {
72 ServletContext context = event.getServletContext();
73
74 QMan qman = (QMan) context.getAttribute(Names.APPLICATION_NAME);
75 qman.stop();
76
77 context.removeAttribute(Names.APPLICATION_NAME);
78 }
79 }
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