java - 使用一组触发器在quartz中安排作业

Question

我正在使用quartz 2.2，我想用一组触发器来安排一个作业。 我打算使用以下方法。

void scheduleJobs(Map<JobDetail, Set<? extends Trigger>> triggers, boolean replace)

我的问题是，如何创建一个接受扩展Trigger的类的Set？ TriggerBuilder 仅返回 Trigger，但我无法将相同的内容放入集合中。 我搜索了 API 但没有找到解决方案。

谢谢

Answer 1

纯 Java 中最简单的方法(可能不是最干净的方法)是执行以下操作:

    QuartzScheduler quartzScheduler = ...

    Set<Trigger> triggers = new HashSet<>();
    triggers.add(new SimpleTriggerImpl());
    triggers.add(new CronTriggerImpl());

    Map<JobDetail, Set<? extends Trigger>> triggersAndJobs = new HashMap<>();
    triggersAndJobs.put(new JobDetailImpl(), triggers);

    quartzScheduler.scheduleJobs(triggersAndJobs, false);

或者，如果您没有使用 Java 7:

    QuartzScheduler quartzScheduler = ...

    Set<Trigger> triggers = new HashSet<Trigger>();
    triggers.add(new SimpleTriggerImpl());
    triggers.add(new CronTriggerImpl());

    Map<JobDetail, Set<? extends Trigger>> triggersAndJobs = new HashMap<JobDetail, Set<? extends Trigger>>();
    triggersAndJobs.put(new JobDetailImpl(), triggers);

    quartzScheduler.scheduleJobs(triggersAndJobs, false);

Guava 的较短版本:

    QuartzScheduler quartzScheduler = ...

    Set<? extends Trigger> set = Sets.newHashSet(new SimpleTriggerImpl(), new CronTriggerImpl());

    Map<JobDetail, Set<? extends Trigger>> triggersAndJobs = Maps.newHashMap();
    triggersAndJobs.put(new JobDetailImpl(), set);

    quartzScheduler.scheduleJobs(triggersAndJobs, false);

更新。使用 TriggerBuilder 实际上并没有多大改变。 TriggerBuilder.build() 返回一个触发器实例，可以像 Trigger 一样引用它。

    QuartzScheduler quartzScheduler = ...

    Set<Trigger> triggers = new HashSet<Trigger>();

    Trigger trigger1 = newTrigger()
            .withIdentity(triggerKey("myTrigger", "myTriggerGroup"))
            .withSchedule(simpleSchedule()
                    .withIntervalInHours(1)
                    .repeatForever())
            .startAt(futureDate(10, DateBuilder.IntervalUnit.MINUTE))
            .build();
    triggers.add(trigger1);

    Trigger trigger2 = newTrigger() ...
    triggers.add(trigger2);

    Map<JobDetail, Set<? extends Trigger>> triggersAndJobs = new HashMap<JobDetail, Set<? extends Trigger>>();
    triggersAndJobs.put(new JobDetailImpl(), triggers);

    quartzScheduler.scheduleJobs(triggersAndJobs, false);