1 /*
2 * #%L
3 * Bitrepository Webclient
4 * %%
5 * Copyright (C) 2010 - 2012 The State and University Library, The Royal Library and The State Archives, Denmark
6 * %%
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation, either version 2.1 of the
10 * License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Lesser Public License for more details.
16 *
17 * You should have received a copy of the GNU General Lesser Public
18 * License along with this program. If not, see
19 * <http://www.gnu.org/licenses/lgpl-2.1.html>.
20 * #L%
21 */
22 package org.bitrepository.webservice;
23
24 import javax.servlet.ServletContextEvent;
25 import javax.servlet.ServletContextListener;
26
27 import org.bitrepository.BasicClient;
28 import org.bitrepository.BasicClientFactory;
29 import org.bitrepository.utils.LogbackConfigLoader;
30 import org.slf4j.Logger;
31 import org.slf4j.LoggerFactory;
32
33
34 /**
35 * The Listener has two intentions
36 * 1) Acquire necessary information at startup to locate configuration files and create the first instance
37 * of the basic client, so everything is setup before the first users start using the webservice.
38 * 2) In time shut the service down in a proper manner, so no threads will be orphaned.
39 */
40 public class WebclientContextListener implements ServletContextListener {
41 private final Logger log = LoggerFactory.getLogger(getClass());
42
43 /**
44 * Do initialization work
45 */
46 @SuppressWarnings("unused")
47 @Override
48 public void contextInitialized(ServletContextEvent sce) {
49 String confDir = sce.getServletContext().getInitParameter("configurationDir");
50 if(confDir == null) {
51 throw new RuntimeException("No configuration directory specified!");
52 }
53 log.debug("Configuration dir = " + confDir);
54 try {
55 new LogbackConfigLoader(confDir + "/logback.xml");
56 } catch (Exception e) {
57 log.info("Failed to read log configuration file. Falling back to default.");
58 }
59 BasicClientFactory.init(confDir);
60 BasicClient client = BasicClientFactory.getInstance();
61 log.debug("Servlet context initialized");
62 }
63
64 /**
65 * Does work of shutting the webclient down in a graceful manner.
66 * This is done by calling BasicClient's shutdown method.
67 */
68 @Override
69 public void contextDestroyed(ServletContextEvent sce) {
70 BasicClient client = BasicClientFactory.getInstance();
71 client.shutdown();
72 log.debug("Servlet context destroyed");
73 }
74 }