Quartz之JobListener

问题1:我想在一个任务执行后在执行第二个任务怎么办呢
Quartz:使用JobListener(任务监听器可实现)
下面示例中演示了相互传递,请参见注释
Job1Listener.java

public class Job1Listener implements JobListener {

    private static Logger _log = LoggerFactory.getLogger(Job1Listener.class);
    
    public String getName() {
        return "job1_to_job2";
    }

    public void jobToBeExecuted(JobExecutionContext inContext) {
    	//任务监听器执行任务1之前你可以选择的操作
        _log.error("Job1Listener says: Job Is about to be executed.");
        //向任务1传递数据
        inContext.getJobDetail().getJobDataMap().put("username", "天涯");
    }

    public void jobExecutionVetoed(JobExecutionContext inContext) {
        _log.error("Job1Listener says: Job Execution was vetoed.");
    }

    public void jobWasExecuted(JobExecutionContext inContext,JobExecutionException inException) {
        _log.error("Job1Listener says: Job was executed.");
        
        //执行任务2
        JobDetail job2 = newJob(SimpleJob2.class)
            .withIdentity("job2")
            .usingJobData("username", "david") //向任务2传递数据传递可成功接收
            .build();
        
        Trigger trigger = (SimpleTrigger) newTrigger() 
            .withIdentity("job2Trigger")
            .startNow()            
            .build();
        
        //向任务2传递数据,这里不知怎么回事,传递参数在任务2取值为: null
        inContext.getJobDetail().getJobDataMap().put("sex", "男");
        
        try {
            // schedule the job to run!
            inContext.getScheduler().scheduleJob(job2, trigger);
        } catch (SchedulerException e) {
            _log.error("出错了...");
            e.printStackTrace();
        }        
    }
}

ListenerExample.java
Quartz2个人感觉设计相当灵活,脱离了相互依赖,只需要添加监听器相关设置就行了
注意下面代码:
JobListener listener = new Job1Listener();
Matcher<JobKey> matcher = KeyMatcher.keyEquals(job.getKey());
  sched.getListenerManager().addJobListener(listener, matcher); 
这个任务1实现了监听器 joblistener,在这个 joblistener中有四个方法实现,在
public void jobWasExecuted(JobExecutionContext inContext,JobExecutionException inException) {
}
中去执行任务2的操作,以次类推的话,它可执行一个任务集合了

public void run() throws Exception {
    	
        Logger log = LoggerFactory.getLogger(ListenerExample.class);

        SchedulerFactory sf = new StdSchedulerFactory();
        Scheduler sched = sf.getScheduler();

        JobDetail job = newJob(SimpleJob1.class)
            .withIdentity("job1")
            .build();
        
        Trigger trigger = newTrigger() 
            .withIdentity("trigger1")
            .startNow()
            .build();

       
        JobListener listener = new Job1Listener();
        Matcher<JobKey> matcher = KeyMatcher.keyEquals(job.getKey());
        sched.getListenerManager().addJobListener(listener, matcher);    
      
        sched.scheduleJob(job, trigger);      
        sched.start();
      
        try {
          
            Thread.sleep(30L * 1000L);           
        } catch (Exception e) {
        	
        }        
    
        sched.shutdown(true);
        SchedulerMetaData metaData = sched.getMetaData();
        log.error("Executed " + metaData.getNumberOfJobsExecuted() + " jobs.");

    }

SimpleJob1.java

public class SimpleJob1 implements Job {

    private static Logger _log = LoggerFactory.getLogger(SimpleJob1.class);
   
    public SimpleJob1() {
    }

    public void execute(JobExecutionContext context)
        throws JobExecutionException {
        JobKey jobKey = context.getJobDetail().getKey();
        String userName = (String)context.getJobDetail().getJobDataMap().get("username");
        _log.error("SimpleJob1 says: " + jobKey + " executing at " + new Date() + ",姓名: " + userName);
    }
}

SimpleJob2.java

public class SimpleJob2 implements Job {

    private static Logger _log = LoggerFactory.getLogger(SimpleJob2.class);

   
    public SimpleJob2() {
    }

   
    public void execute(JobExecutionContext context)
        throws JobExecutionException {
      
        JobKey jobKey = context.getJobDetail().getKey();
        String userName = (String)context.getJobDetail().getJobDataMap().getString("username");
        String sex = (String)context.getJobDetail().getJobDataMap().getString("sex");
        _log.error("SimpleJob1 says: " + jobKey + " executing at " + new Date() + ",英文名: " + userName+",性别: " + sex);
    }

}

输出结果为：

[ERROR] 2011-08-12 03:56:44.750 下午 DefaultQuartzScheduler_Worker-1 [org.quartz.examples.example9.Job1Listener]
Job1Listener says: Job Is about to be executed.

[ERROR] 2011-08-12 03:56:44.765 下午 DefaultQuartzScheduler_Worker-1 [org.quartz.examples.example9.SimpleJob1]
SimpleJob1 says: DEFAULT.job1 executing at Fri Aug 12 15:56:44 CST 2011,姓名: 天涯

[ERROR] 2011-08-12 03:56:44.765 下午 DefaultQuartzScheduler_Worker-1 [org.quartz.examples.example9.Job1Listener]
Job1Listener says: Job was executed.

[ERROR] 2011-08-12 03:56:44.765 下午 DefaultQuartzScheduler_Worker-2 [org.quartz.examples.example9.SimpleJob2]
SimpleJob1 says: DEFAULT.job2 executing at Fri Aug 12 15:56:44 CST 2011,英文名: david,性别: null