Question

我在基于Spring 3.0的应用程序中使用Quartz Scheduler。我成功地创建了新的调度程序，它们工作正常。

但是..我无法在我的石英作业文件中检索servletContext。任何人都可以帮助我如何在executeInternal（）方法中检索servletContext引用??

Gunjan Shah， THX。

Answer 1

我有类似的需求。我以与the solution presented here.类似的方式对其进行了整理在我的servlet上下文监听器中，我使用作业数据映射对象设置servlet上下文，然后为作业设置该对象：

    @Override
    public void contextInitialized(ServletContextEvent sce) {
        try {
            //Create & start the scheduler.
            StdSchedulerFactory factory = new StdSchedulerFactory();
            factory.initialize(sce.getServletContext().getResourceAsStream("/WEB-INF/my_quartz.properties"));
            scheduler = factory.getScheduler();
            //pass the servlet context to the job
            JobDataMap jobDataMap = new JobDataMap();
            jobDataMap.put("servletContext", sce.getServletContext());
            // define the job and tie it to our job's class
            JobDetail job = newJob(ImageCheckJob.class).withIdentity("job1", "group1").usingJobData(jobDataMap).build();
            // Trigger the job to run now, and then repeat every 3 seconds
            Trigger trigger = newTrigger().withIdentity("trigger1", "group1").startNow()
                  .withSchedule(simpleSchedule().withIntervalInMilliseconds(3000L).repeatForever()).build();
            // Tell quartz to schedule the job using our trigger
            scheduler.scheduleJob(job, trigger);
            // and start it off
            scheduler.start();
        } catch (SchedulerException ex) {
            log.error(null, ex);
        }
    }

然后在我的工作中我这样做：

    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        ServletContext servletContext = (ServletContext) context.getMergedJobDataMap().get("servletContext");
        //...
    }

修改此外，既然你提到你正在使用Spring I found this link，那么在上一篇文章中，一个人提到实现ServletContextAware。就个人而言，我会选择JobDataMap，因为这是它的作用。

Answer 2

从Quartz 2.0开始，如果您在web.xml中通过QuartzInitializerServlet启动webapp中的调度程序，则可以通过将scheduler-context-servlet-context-key设置为init参数将ServletContext存储在SchedulerContext中，如下所示：

<!-- Quartz Scheduler Initializer Servlet -->
<servlet>
    <servlet-name>QuartzInitializer</servlet-name>
    <servlet-class>org.quartz.ee.servlet.QuartzInitializerServlet</servlet-class>
    <init-param>
        <param-name>shutdown-on-unload</param-name>
        <param-value>true</param-value>
    </init-param>
    <init-param>
        <param-name>start-scheduler-on-load</param-name>
        <param-value>true</param-value>
    </init-param>
    <init-param>
        <param-name>scheduler-context-servlet-context-key</param-name>
        <param-value>servletContext</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

请参阅代码中的以下参考：https://github.com/elventear/quartz-scheduler/blob/quartz-2.0.0-rc/quartz/src/main/java/org/quartz/ee/servlet/QuartzInitializerServlet.java#L122

Answer 3

从QuartzJob配置到你的ServletContext就像Kalman说的那样，然后这里有一些代码来获得一个真正的＆＃34; servletContext＆＃34;

private void initContext(JobExecutionContext jobContext) {

    Scheduler scheduler = jobContext.getScheduler();
    SchedulerContext schedulerContext = null;
    try {
        schedulerContext = scheduler.getContext();
    } catch (SchedulerException e) {
        e.printStackTrace();
    }

     ServletContext servletContext = (ServletContext)schedulerContext.get("servletContext");
     System.out.println("ServletContextName : "+  servletContext.getServletContextName());

检索quartz调度程序中的servletContext引用

3 个答案: