Quartz之JobExecutionException

问题1 如果你的任务执行发生错误了怎么办呀! 
Quartz提供了二种解决方法 
1 立即重新执行任务 
2 立即停止所有相关这个任务的触发器 
问题2 怎么去执行呢 
Quartz的解决方式是 
在你的程序出错时,用Quartz提供的JobExecutionException类相关方法很好的解决 
1  立即重新执行任务 

Java代码   

1. try {  
2.            int zero = 0;  
3.            @SuppressWarnings("unused")  
4.            int calculation = 4815 / zero;  
5.        } catch (Exception e) {  
6.            _log.error("执行任务出错了...");  
7.            JobExecutionException e2 =   
8.                new JobExecutionException(e);  
9.            // this job will refire immediately  
10.            e2.setRefireImmediately(true);  
11.            throw e2;  
12.        }  

请注意其中作者写的注释: 
// this job will refire immediately 
e2.setRefireImmediately(true); 
2 立即停止所有相关这个任务的触发器 

Java代码   

1. try {  
2.             int zero = 0;  
3.             @SuppressWarnings("unused")  
4.             int calculation = 4815 / zero;  
5.         } catch (Exception e) {  
6.             _log.info("--- Error in job!");  
7.             JobExecutionException e2 =   
8.                 new JobExecutionException(e);  
9.             // Quartz will automatically unschedule  
10.             // all triggers associated with this job  
11.             // so that it does not run again  
12.             e2.setUnscheduleAllTriggers(true);  
13.             throw e2;  
14.         }  

请注意其中作者写的注释: 
// Quartz will automatically unschedule 
// all triggers associated with this job 
// so that it does not run again 
e2.setUnscheduleAllTriggers(true); 
具体代码如下: 
BadJob1.java 

Java代码   

1. package org.quartz.examples.example6;  
2.   
3. import java.util.Date;  
4.   
5. import org.quartz.DisallowConcurrentExecution;  
6. import org.quartz.Job;  
7. import org.quartz.JobExecutionContext;  
8. import org.quartz.JobExecutionException;  
9. import org.quartz.JobKey;  
10. import org.quartz.PersistJobDataAfterExecution;  
11. import org.slf4j.Logger;  
12. import org.slf4j.LoggerFactory;  
13.   
14. /** 
15.  * <p> 
16.  * A job dumb job that will throw a job execution exception 
17.  * </p> 
18.  *  
19.  * @author Bill Kratzer 
20.  */  
21. @PersistJobDataAfterExecution  
22. @DisallowConcurrentExecution  
23. public class BadJob1 implements Job {  
24.      
25.     private static Logger _log = LoggerFactory.getLogger(BadJob1.class);  
26.   
27.      
28.     public BadJob1() {  
29.     }  
30.   
31.      
32.     public void execute(JobExecutionContext context)  
33.         throws JobExecutionException {  
34.         JobKey jobKey = context.getJobDetail().getKey();  
35.         _log.error("任务key: " + jobKey + " ,执行时间: " + new Date());  
36.   
37.         try {  
38.             int zero = 0;  
39.             @SuppressWarnings("unused")  
40.             int calculation = 4815 / zero;  
41.         } catch (Exception e) {  
42.             _log.error("执行任务出错了...");  
43.             JobExecutionException e2 =   
44.                 new JobExecutionException(e);  
45.             // this job will refire immediately  
46.             e2.setRefireImmediately(true);  
47.             throw e2;  
48.         }  
49.   
50.         _log.error("---" + jobKey + " completed at " + new Date());  
51.     }  
52. }  

BadJob2 .java 

Java代码   

1. package org.quartz.examples.example6;  
2.   
3. import java.util.Date;  
4.   
5. import org.quartz.DisallowConcurrentExecution;  
6. import org.quartz.Job;  
7. import org.quartz.JobExecutionContext;  
8. import org.quartz.JobExecutionException;  
9. import org.quartz.JobKey;  
10. import org.quartz.PersistJobDataAfterExecution;  
11. import org.slf4j.Logger;  
12. import org.slf4j.LoggerFactory;  
13.   
14. /** 
15.  * <p> 
16.  * A job dumb job that will throw a job execution exception 
17.  * </p> 
18.  *  
19.  * @author Bill Kratzer 
20.  */  
21. @PersistJobDataAfterExecution  
22. @DisallowConcurrentExecution  
23. public class BadJob2 implements Job {     
24.   
25.     private static Logger _log = LoggerFactory.getLogger(BadJob2.class);   
26.   
27.     public BadJob2() {  
28.     }  
29.     
30.     public void execute(JobExecutionContext context)  
31.         throws JobExecutionException {  
32.         JobKey jobKey = context.getJobDetail().getKey();  
33.         _log.info("---" + jobKey + " executing at " + new Date());  
34.   
35.         try {  
36.             int zero = 0;  
37.             @SuppressWarnings("unused")  
38.             int calculation = 4815 / zero;  
39.         } catch (Exception e) {  
40.             _log.info("--- Error in job!");  
41.             JobExecutionException e2 =   
42.                 new JobExecutionException(e);  
43.             // Quartz will automatically unschedule  
44.             // all triggers associated with this job  
45.             // so that it does not run again  
46.             e2.setUnscheduleAllTriggers(true);  
47.             throw e2;  
48.         }  
49.   
50.         _log.info("---" + jobKey + " completed at " + new Date());  
51.     }  
52. }  

JobExceptionExample.java 

Java代码   

1. package org.quartz.examples.example6;  
2.   
3. import static org.quartz.JobBuilder.newJob;  
4. import static org.quartz.SimpleScheduleBuilder.simpleSchedule;  
5. import static org.quartz.TriggerBuilder.newTrigger;  
6. import static org.quartz.DateBuilder.*;  
7.   
8. import java.util.Date;  
9.   
10. import org.quartz.JobDetail;  
11. import org.quartz.Scheduler;  
12. import org.quartz.SchedulerFactory;  
13. import org.quartz.SchedulerMetaData;  
14. import org.quartz.SimpleTrigger;  
15. import org.quartz.impl.StdSchedulerFactory;  
16. import org.slf4j.Logger;  
17. import org.slf4j.LoggerFactory;  
18.   
19. /** 
20.  *  
21.  * This job demonstrates how Quartz can handle JobExecutionExceptions that are 
22.  * thrown by jobs. *  
23.  * @author Bill Kratzer 
24.  */  
25. public class JobExceptionExample {  
26.   
27.     public void run() throws Exception {  
28.         Logger log = LoggerFactory.getLogger(JobExceptionExample.class);  
29.   
30.        
31.         SchedulerFactory sf = new StdSchedulerFactory();  
32.         Scheduler sched = sf.getScheduler();  
33.        
34.         Date startTime = nextGivenSecondDate(null, 15);  
35.   
36.         
37.         JobDetail job = newJob(BadJob1.class)  
38.             .withIdentity("badJob1", "group1")  
39.             .build();  
40.           
41.         SimpleTrigger trigger = newTrigger()   
42.             .withIdentity("trigger1", "group1")  
43.             .startAt(startTime)  
44.             .withSchedule(simpleSchedule())  
45.             .build();  
46.   
47.         Date ft = sched.scheduleJob(job, trigger);  
48.         log.error(job.getKey() + " will run at: " + ft + " and repeat: "  
49.                 + trigger.getRepeatCount() + " times, every "  
50.                 + trigger.getRepeatInterval() / 1000 + " seconds");  
51.   
52.         
53.         job = newJob(BadJob2.class)  
54.             .withIdentity("badJob2", "group1")  
55.             .build();  
56.           
57.         trigger = newTrigger()   
58.             .withIdentity("trigger2", "group1")  
59.             .startAt(startTime)  
60.             .withSchedule(simpleSchedule()  
61.                     .withIntervalInSeconds(3)  
62.                     .repeatForever())  
63.             .build();  
64.   
65.         ft = sched.scheduleJob(job, trigger);  
66.         log.error(job.getKey() + " will run at: " + ft + " and repeat: "  
67.                 + trigger.getRepeatCount() + " times, every "  
68.                 + trigger.getRepeatInterval() / 1000 + " seconds");      
69.           
70.         sched.start();  
71.           
72.         try {  
73.             // sleep for 60 seconds  
74.             Thread.sleep(60L * 1000L);  
75.         } catch (Exception e) {  
76.               
77.         }  
78.   
79.         sched.shutdown(true);  
80.   
81.         SchedulerMetaData metaData = sched.getMetaData();  
82.         log.error("Executed " + metaData.getNumberOfJobsExecuted() + " jobs.");  
83.     }  
84.   
85.     public static void main(String[] args) throws Exception {  
86.   
87.         JobExceptionExample example = new JobExceptionExample();  
88.         example.run();  
89.     }  
90. }