Quartz学习之Lesson7-TriggerListeners and JobListeners

Listener用来监听相关的event，并可以根据相应的event，采取不同的action。在Quartz中有两种形式的Listenter，一种是TriggerListeners，一种是JobListeners。

与Trigger相关联的事件包括：trigger firings, trigger mis-firings (discussed in the “Triggers” section of this document), and trigger completions (the jobs fired off by the trigger is finished)

与Job相关联的事件包括：a notification that the job is about to be executed, and a notification when the job has completed execution

Using Your Own Listeners

可以通过两种方式定义自己的Listener，一种是implement

TriggerListener and/or org.quartz.JobListener两个接口；一种是extends JobListenerSupport or TriggerListenerSupport

比如可以向Scheduler中注册这样的一个JobListener，用于监听名称为myJobName，group为myJobGroup的Job：

scheduler.getListenerManager().addJobListener(myJobListener, KeyMatcher.jobKeyEquals(new JobKey("myJobName", "myJobGroup")));