Quartz Job Scheduling Framework［翻译］第十三章. Quartz 和 Web 应用 (第四部分)

 1import javax.servlet.ServletContext;
 2import javax.servlet.ServletContextEvent;
 3import javax.servlet.ServletContextListener;
 4
 5import org.apache.commons.logging.Log;
 6import org.apache.commons.logging.LogFactory;
 7import org.quartz.SchedulerException;
 8import org.quartz.impl.StdSchedulerFactory;
 9
10public class QuartzServletContextListener implements ServletContextListener {
11    private static Log logger = LogFactory
12              .getLog(QuartzServletContextListener.class);
13
14    public static final String QUARTZ_FACTORY_KEY =
15         "org.quartz.impl.StdSchedulerFactory.KEY";
16
17    private ServletContext ctx = null;
18
19    private StdSchedulerFactory factory = null;
20
21    /**
22     * Called when the container is shutting down.
23     */
24    public void contextDestroyed(ServletContextEvent sce) {
25         try {
26              factory.getDefaultScheduler().shutdown();
27         } catch (SchedulerException ex) {
28              logger.error("Error stopping Quartz", ex);
29         }
30
31    }
32
33    /**
34     * Called when the container is first started.
35     */
36    public void contextInitialized(ServletContextEvent sce) {
37
38         ctx = sce.getServletContext();
39
40         try {
41
42              factory = new StdSchedulerFactory();
43
44              // Start the scheduler now
45
46              factory.getScheduler().start();
47
48              logger.info("Storing QuartzScheduler Factory at"
49                        + QUARTZ_FACTORY_KEY);
50
51              ctx.setAttribute(QUARTZ_FACTORY_KEY, factory);
52
53        } catch (Exception ex) {
54              logger.error("Quartz failed to initialize", ex);
55         }
56    }
57}

1<web-app>
2 <listener>
3   <listener-class>
4  org.cavaness.jobconsole.web.QuartzServletContextListener
5  </listener-class>
6 </listener>
7 <!--Other deployment descriptor info not shown -->
8</web-app>