quartz学习笔记二(example2)

最新推荐文章于 2023-10-09 00:20:12 发布

最新推荐文章于 2023-10-09 00:20:12 发布 · 147 阅读

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本文介绍了Quartz调度器中JobDetail和SimpleTrigger的构造方法，并演示了如何在调度器启动后添加新的任务和触发器，包括设置任务立即执行的方法。

一 JobDetail的构造方法

JobDetail的构造方法相对比较简单

 public JobDetail(String name, String group, Class jobClass) {
        setName(name);
        setGroup(group);
        setJobClass(jobClass);
    }

二 SimpleTrigger 的构造方法

下面这个是比较全面的构造方法

    /**
     * <p>
     * Create a <code>SimpleTrigger</code> that will occur at the given time,
     * fire the identified <code>Job</code> and repeat at the the given
     * interval the given number of times, or until the given end time.
     * </p>
     * 
     * @param startTime
     *          A <code>Date</code> set to the time for the <code>Trigger</code>
     *          to fire.
     * @param endTime
     *          A <code>Date</code> set to the time for the <code>Trigger</code>
     *          to quit repeat firing.
     * @param repeatCount
     *          The number of times for the <code>Trigger</code> to repeat
     *          firing, use {@link #REPEAT_INDEFINITELY}for unlimitted times.
     * @param repeatInterval
     *          The number of milliseconds to pause between the repeat firing.
     */
    public SimpleTrigger(String name, String group, String jobName,
            String jobGroup, Date startTime, Date endTime, int repeatCount,
            long repeatInterval) {

        super(name, group, jobName, jobGroup);

        setStartTime(startTime);
        setEndTime(endTime);
        setRepeatCount(repeatCount);
        setRepeatInterval(repeatInterval);
    }

三.在调度器启动后仍然可以添加新的任务和触发器

       sched.start();
        // jobs can also be scheduled after start() has been called...
        // job7 will repeat 20 times, repeat every five minutes
        job = new JobDetail("job7", "group1", SimpleJob.class);
        trigger = new SimpleTrigger("trigger7", "group1", "job7", "group1",
                new Date(ts), null, 20, 300000L);
        ft = sched.scheduleJob(job, trigger);

四.可以设置任务立即执行

   // jobs can be fired directly... (rather than waiting for a trigger)
        job = new JobDetail("job8", "group1", SimpleJob.class);
        job.setDurability(true);
        sched.addJob(job, true);
        sched.triggerJob("job8", "group1");