quartz2.3.0（六）job任务异常处理方式
Job1类
package org.quartz.examples.example6; import org.quartz.DisallowConcurrentExecution; import org.quartz.Job; import org.quartz.JobDataMap; import org.quartz.JobExecutionContext; import org.quartz.JobExecutionException; import org.quartz.JobKey; import org.quartz.PersistJobDataAfterExecution; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Date; /** * <p> * 一个会引发作业执行异常的作业 * </p> */ @PersistJobDataAfterExecution // 持久化JobDataMap里的数据，使下一个定时任务还能获取到这些值 @DisallowConcurrentExecution // 禁止并发多任务执行，所以永远只有一个任务在执行中 public class BadJob1 implements Job { // Logging private static Logger LOG = LoggerFactory.getLogger(BadJob1.class); private int calculation; //必须要有public修饰的无参构造函数 public BadJob1() { } //定时器执行方法 public void execute(JobExecutionContext context) throws JobExecutionException { JobKey jobKey = context.getJobDetail().getKey(); JobDataMap dataMap = context.getJobDetail().getJobDataMap(); int denominator = dataMap.getInt("denominator"); LOG.info("---" + jobKey + " executing at " + new Date() + " with denominator " + denominator); // 一个人为设计的异常示例，该异常将由该作业生成，原因是除0错误(仅在第一次运行时) try { calculation = 4815 / denominator; } catch (Exception e) { LOG.info("--- Error in job!"); JobExecutionException e2 = new JobExecutionException(e); // 修正分母，以便下次作业运行时不会再次失败 dataMap.put("denominator", "1"); // 是否立即重新触发任务？true e2.setRefireImmediately(true); throw e2; } LOG.info("---" + jobKey + " completed at " + new Date()); } }
Job2类
package org.quartz.examples.example6; import java.util.Date; import org.quartz.DisallowConcurrentExecution; import org.quartz.Job; import org.quartz.JobExecutionContext; import org.quartz.JobExecutionException; import org.quartz.JobKey; import org.quartz.PersistJobDataAfterExecution; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * <p> * 一个会引发作业执行异常的作业 * </p> */ @PersistJobDataAfterExecution // 持久化JobDataMap里的数据，使下一个定时任务还能获取到这些值 @DisallowConcurrentExecution // 禁止并发多任务执行，所以永远只有一个任务在执行中 public class BadJob2 implements Job { // Logging private static Logger LOG = LoggerFactory.getLogger(BadJob2.class); private int calculation; // 必须要有public修饰的无参构造函数 public BadJob2() { } // 定时器执行方法 public void execute(JobExecutionContext context) throws JobExecutionException { JobKey jobKey = context.getJobDetail().getKey(); LOG.info("---" + jobKey + " executing at " + new Date()); // 一个人为设计的异常示例，该异常将由该作业由于除零错误而生成 try { int zero = 0; calculation = 4815 / zero; } catch (Exception e) { LOG.info("--- Error in job!"); JobExecutionException e2 = new JobExecutionException(e); // Quartz将自动取消与此作业关联的所有触发器的调度，这样它就不会再次运行 e2.setUnscheduleAllTriggers(true); throw e2; } LOG.info("---" + jobKey + " completed at " + new Date()); } }
任务调度类
package org.quartz.examples.example6; import static org.quartz.DateBuilder.nextGivenSecondDate; import static org.quartz.JobBuilder.newJob; import static org.quartz.SimpleScheduleBuilder.simpleSchedule; import static org.quartz.TriggerBuilder.newTrigger; import org.quartz.JobDetail; import org.quartz.Scheduler; import org.quartz.SchedulerFactory; import org.quartz.SchedulerMetaData; import org.quartz.SimpleTrigger; import org.quartz.impl.StdSchedulerFactory; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Date; /** * 这个作业演示了Quartz如何处理作业抛出的JobExecutionExceptions */ public class JobExceptionExample { Logger LOG = LoggerFactory.getLogger(JobExceptionExample.class); public void run() throws Exception { // 初始化一个调度工厂，并实例化一个调度类 SchedulerFactory sf = new StdSchedulerFactory(); Scheduler sched = sf.getScheduler(); // 第一个参数：null就是默认当前时间，也可以指定时间 // 第二个参数：把一分钟按15进行划分，也就是60/15等份。 // 举例：当前时间是21:01:27，那么startTime就是21:15:00。当前时间是21:35:32，那么startTime就是21:45:00。 Date startTime = nextGivenSecondDate(null, 15); // ======================================================== // ============ badJob1将每10秒运行一次，此作业将抛出异常并立即重新启动。 // ======================================================== JobDetail job = newJob(BadJob1.class).withIdentity("badJob1", "group1").usingJobData("denominator", "0") .build(); // 触发器每间隔10秒执行一次，无限循环 SimpleTrigger trigger = newTrigger().withIdentity("trigger1", "group1").startAt(startTime) .withSchedule(simpleSchedule().withIntervalInSeconds(10).repeatForever()).build(); Date ft = sched.scheduleJob(job, trigger); LOG.info(job.getKey() + " will run at: " + ft + " and repeat: " + trigger.getRepeatCount() + " times, every " + trigger.getRepeatInterval() / 1000 + " seconds"); // ======================================================== // ============ badJob2将每5秒运行一次，此作业将抛出异常，在异常catch块里取消了使用该任务触发器的所有任务的触发，并且永不重新启动。 // ======================================================== JobDetail job2 = newJob(BadJob2.class).withIdentity("badJob2", "group1").build(); // 触发器每间隔5秒执行一次，无限循环 SimpleTrigger trigger2 = newTrigger().withIdentity("trigger2", "group1").startAt(startTime) .withSchedule(simpleSchedule().withIntervalInSeconds(5).repeatForever()).build(); Date ft2 = sched.scheduleJob(job2, trigger2); LOG.info(job2.getKey() + " will run at: " + ft2 + " and repeat: " + trigger2.getRepeatCount() + " times, every " + trigger2.getRepeatInterval() / 1000 + " seconds"); sched.start(); Thread.sleep(30L * 1000L); sched.shutdown(false); LOG.info("------- Shutdown Complete -----------------"); SchedulerMetaData metaData = sched.getMetaData(); LOG.info("Executed " + metaData.getNumberOfJobsExecuted() + " jobs."); } public static void main(String[] args) throws Exception { JobExceptionExample example = new JobExceptionExample(); example.run(); } }
