在Quartz框架提供了JobListener接口，可在任务执行前、任务被拒绝及任务执行完成后实现对任务的拦截，该接口的声明如下：
public interface JobListener { /**返回监听器名*/ String getName(); /**任务执行前对任务拦截*/ void jobToBeExecuted(JobExecutionContext context); /**任务被否决对任务拦截*/ void jobExecutionVetoed(JobExecutionContext context); /**任务执行完成对任务进行拦截*/ void jobWasExecuted(JobExecutionContext context,JobExecutionException jobException); }
下面简单实现了一个JobListener监听任务执行时间
public class SimpleJobListener implements JobListener { private static final SimpleDateFormat SDF = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); @Override public String getName() { return getClass().getSimpleName(); } /** * 任务执行前被调用[任务执行加入任务提交时间] * */ public void jobToBeExecuted(JobExecutionContext context) { String job = context.getJobDetail().getJobClass().getSimpleName(); JobDataMap jobDataMap = context.getJobDetail().getJobDataMap(); long start = System.currentTimeMillis(); String date = SDF.format(new Date()); jobDataMap.put("time", start); jobDataMap.put("date", date); System.out.println("[" + job + "]在[" + date + "]加入Quartz~~"); } @Override public void jobExecutionVetoed(JobExecutionContext context) { String job = context.getJobDetail().getJobClass().getSimpleName(); System.out.println("[" + job + "]在[" + SDF.format(new Date()) + "]被Quartz否决~~"); } @Override public void jobWasExecuted(JobExecutionContext context, JobExecutionException jobException) { String job = context.getJobDetail().getJobClass().getSimpleName(); JobDataMap jobDataMap = context.getJobDetail().getJobDataMap(); long start = jobDataMap.getLong("time"); String date = jobDataMap.getString("date"); System.out.println("[" + job + "]在[" + date + "]添加,[" + SDF.format(new Date()) + "]执行完成,耗时[" + (System.currentTimeMillis() - start) + "] ms"); } }
任务执行前加入JobListener
public class SchedulerDemo {
private static final SimpleDateFormat SDF = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
private static SchedulerFactory schedulerFactory ;
static {
try {
Properties props = new Properties();
props.load(SchedulerDemo.class.getResourceAsStream("quartz.properties"));
schedulerFactory = new StdSchedulerFactory(props);
} catch (Exception e) {
System.out.println("[StdSchedulerFactory] init error");
}
}
public static class HelloQuartzJob implements Job {
@Override
public void execute(JobExecutionContext context) throws JobExecutionException {
System.out.println("Hello Quartz! - executing its Job at [" + SDF.format(new Date()) + "] by [" + context.getTrigger().getDescription() + "]");
}
}
public String formatJobName(Trigger trigger , String name) {
return trigger.getClass().getSimpleName() + "_" + name + "_" + System.currentTimeMillis();
}
public String formatTriggerName(Class<? extends Trigger> clazz) {
return clazz.getSimpleName() + "_" + System.currentTimeMillis();
}
public void addJobListenerToJob(Scheduler scheduler, JobListener listener, Matcher<JobKey> matcher) throws Exception {
scheduler.getListenerManager().addJobListener(listener, matcher);
}
/**
* JobDetail的构造通过JobBuilder构建,JobBuilder在内部调用JobDetail的实现类JobDetailImpl
* */
public void run(Trigger trigger) throws SchedulerException {
try {
Scheduler scheduler = schedulerFactory.getScheduler();
String jobName = formatJobName(trigger,"HelloQuartz");
String jobGroup = "demo";
JobDetail jobDetail = JobBuilder.newJob(HelloQuartzJob.class)
.withIdentity(jobName, jobGroup)
.build();
/**添加监听器*/
Matcher<JobKey> matcher = KeyMatcher.keyEquals(new JobKey(jobName,jobGroup));
addJobListenerToJob(scheduler, new SimpleJobListener(), matcher);
scheduler.scheduleJob(jobDetail, trigger);
scheduler.start();
} catch (Exception e) {
System.out.println("Quartz运行异常[" + e.getMessage() + "]");
}
}
/**
* Trigger的构造通过TriggerBuilder创建
* */
public Trigger getSimpleTrigger() {
SimpleTrigger simpleTrigger = (SimpleTrigger) TriggerBuilder.newTrigger()
.withIdentity(formatTriggerName(SimpleTrigger.class), "demo")
.withDescription("SimpleTrigger")
.startNow()
.withSchedule(SimpleScheduleBuilder.simpleSchedule()
.withIntervalInSeconds(10)
.withRepeatCount(5))
.build();
return simpleTrigger;
}
public static void main(String []args) throws SchedulerException {
SchedulerDemo schedulerDemo = new SchedulerDemo();
schedulerDemo.run(schedulerDemo.getSimpleTrigger());
}
}
原文：http://www.cnblogs.com/hanfight/p/4803416.html