本文首次发布于My Blog,作者@张琦(Ian),转载请保留原文链接。
有状态和无状态
使用有状态(StatefulJob)还是无状态的任务(Job)
在 Quartz 中,基本来说,任务分为有状态和无状态两种。实现 Job 接口的任务缺省为无状态的。Quartz 中还有另外一个接口 StatefulJob。实现 StatefulJob 接口的任务为有状态的。
无状态任务:一般指可以并发的任务,即任务之间是独立的,不会互相干扰。有状态反之。
通过Quartz获得状态为启动的所有job
/*
Create a GroupMatcher that matches job groups starting with the given string.*/
GroupMatcher<JobKey> matcher = GroupMatcher.anyJobGroup();/*
Get the keys of all the JobDetails in the matching groups.*/
Set<JobKey> jobKeys = sched.getJobKeys(matcher);
通过jobKeys可以获取job的名称,和一系列的东西。不知道怎么获得,可以看quartz定时任务了解下,再根据下面的api文档基本就没问题了。
这两个是放job类上的注解。
@DisallowConcurrentExecution //意思是:禁止并发执行多个相同定义的JobDetail,就是我们想要的。
@PersistJobDataAfterExecution //意思是:放在JobDetail 里的JobDataMap是共享的,也就是相同任务之间执行时可以传输信息
工具类:
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;import javax.annotation.PostConstruct;import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.JobExecutionContext;
import org.quartz.JobKey;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.Trigger;
import org.quartz.TriggerBuilder;
import org.quartz.TriggerKey;
import org.quartz.impl.matchers.GroupMatcher;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.quartz.SchedulerFactoryBean;
import org.springframework.stereotype.Service;import cn.net.yto.o2iMonitor.quartz.QuartzJobFactory;
import cn.net.yto.o2iMonitor.quartz.QuartzJobFactoryDisallowConcurrentExecution;
import cn.net.yto.o2iMonitor.quartz.ScheduleJob;
import cn.net.yto.o2iMonitor.quartz.mapper.JobConfigMapper;public class JobConfigService {private static final Logger LOGGER = LoggerFactory.getLogger(JobConfigService.class);@Autowiredprivate SchedulerFactoryBean schedulerFactoryBean;@Autowiredprivate JobConfigMapper scheduleJobMapper;/*** 从数据库中取 区别于getAllJob* * @return*/public List<ScheduleJob> getAllTask() {return scheduleJobMapper.getAll();}/*** 添加到数据库中 区别于addJob*/public void addTask(ScheduleJob job) {job.setCreateTime(new Timestamp(System.currentTimeMillis()));scheduleJobMapper.insertSelective(job);}/*** 从数据库中查询job*/public ScheduleJob getTaskById(Long jobId) {return scheduleJobMapper.selectByPrimaryKey(jobId);}/*** 更改任务状态* * @throws SchedulerException*/public void changeStatus(Long jobId, String cmd) throws SchedulerException {ScheduleJob job = getTaskById(jobId);if (job == null) {return;}if ("stop".equals(cmd)) {deleteJob(job);job.setStatus(ScheduleJob.STATUS_NOT_RUNNING);} else if ("start".equals(cmd)) {job.setStatus(ScheduleJob.STATUS_RUNNING);addJob(job);}scheduleJobMapper.updateByPrimaryKeySelective(job);}/*** 更改任务 cron表达式* * @throws SchedulerException*/public void updateCron(Long jobId, String cron) throws SchedulerException {ScheduleJob job = getTaskById(jobId);if (job == null) {return;}job.setCron(cron);if (ScheduleJob.STATUS_RUNNING.equals(job.getStatus())) {updateJobCron(job);}scheduleJobMapper.updateByPrimaryKeySelective(job);}/*** 添加任务* * @param scheduleJob* @throws SchedulerException*/public void addJob(ScheduleJob job) throws SchedulerException {if (job == null || !ScheduleJob.STATUS_RUNNING.equals(job.getStatus())) {return;}Scheduler scheduler = schedulerFactoryBean.getScheduler();LOGGER.debug(scheduler+ ".......................................................................................add");TriggerKey triggerKey = TriggerKey.triggerKey(job.getName(), job.getGroup());CronTrigger trigger = (CronTrigger) scheduler.getTrigger(triggerKey);// 不存在,创建一个if (null == trigger) {Class clazz = ScheduleJob.CONCURRENT_IS.equals(job.getIsConcurrent()) ? QuartzJobFactory.class: QuartzJobFactoryDisallowConcurrentExecution.class;JobDetail jobDetail = JobBuilder.newJob(clazz).withIdentity(job.getName(), job.getGroup()).build();jobDetail.getJobDataMap().put("scheduleJob", job);CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(job.getCron());trigger = TriggerBuilder.newTrigger().withIdentity(job.getName(), job.getGroup()).withSchedule(scheduleBuilder).build();scheduler.scheduleJob(jobDetail, trigger);} else {// Trigger已存在,那么更新相应的定时设置CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(job.getCron());// 按新的cronExpression表达式重新构建triggertrigger = trigger.getTriggerBuilder().withIdentity(triggerKey).withSchedule(scheduleBuilder).build();// 按新的trigger重新设置job执行scheduler.rescheduleJob(triggerKey, trigger);}}@PostConstructpublic void init() throws Exception {Scheduler scheduler = schedulerFactoryBean.getScheduler();// 这里获取任务信息数据List<ScheduleJob> jobList = scheduleJobMapper.getAll();for (ScheduleJob job : jobList) {addJob(job);}}/*** 获取所有计划中的任务列表* * @return* @throws SchedulerException*/public List<ScheduleJob> getAllJob() throws SchedulerException {Scheduler scheduler = schedulerFactoryBean.getScheduler();GroupMatcher<JobKey> matcher = GroupMatcher.anyJobGroup();Set<JobKey> jobKeys = scheduler.getJobKeys(matcher);List<ScheduleJob> jobList = new ArrayList<ScheduleJob>();for (JobKey jobKey : jobKeys) {List<? extends Trigger> triggers = scheduler.getTriggersOfJob(jobKey);for (Trigger trigger : triggers) {ScheduleJob job = new ScheduleJob();job.setName(jobKey.getName());job.setGroup(jobKey.getGroup());job.setDescription("触发器:" + trigger.getKey());Trigger.TriggerState triggerState = scheduler.getTriggerState(trigger.getKey());job.setStatus(triggerState.name());if (trigger instanceof CronTrigger) {CronTrigger cronTrigger = (CronTrigger) trigger;String cronExpression = cronTrigger.getCronExpression();job.setCron(cronExpression);}jobList.add(job);}}return jobList;}/*** 所有正在运行的job* * @return* @throws SchedulerException*/public List<ScheduleJob> getRunningJob() throws SchedulerException {Scheduler scheduler = schedulerFactoryBean.getScheduler();List<JobExecutionContext> executingJobs = scheduler.getCurrentlyExecutingJobs();List<ScheduleJob> jobList = new ArrayList<ScheduleJob>(executingJobs.size());for (JobExecutionContext executingJob : executingJobs) {ScheduleJob job = new ScheduleJob();JobDetail jobDetail = executingJob.getJobDetail();JobKey jobKey = jobDetail.getKey();Trigger trigger = executingJob.getTrigger();job.setName(jobKey.getName());job.setGroup(jobKey.getGroup());job.setDescription("触发器:" + trigger.getKey());Trigger.TriggerState triggerState = scheduler.getTriggerState(trigger.getKey());job.setStatus(triggerState.name());if (trigger instanceof CronTrigger) {CronTrigger cronTrigger = (CronTrigger) trigger;String cronExpression = cronTrigger.getCronExpression();job.setCron(cronExpression);}jobList.add(job);}return jobList;}/*** 暂停一个job* * @param scheduleJob* @throws SchedulerException*/public void pauseJob(ScheduleJob scheduleJob) throws SchedulerException {Scheduler scheduler = schedulerFactoryBean.getScheduler();JobKey jobKey = JobKey.jobKey(scheduleJob.getName(), scheduleJob.getGroup());scheduler.pauseJob(jobKey);}/*** 恢复一个job* * @param scheduleJob* @throws SchedulerException*/public void resumeJob(ScheduleJob scheduleJob) throws SchedulerException {Scheduler scheduler = schedulerFactoryBean.getScheduler();JobKey jobKey = JobKey.jobKey(scheduleJob.getName(), scheduleJob.getGroup());scheduler.resumeJob(jobKey);}/*** 删除一个job* * @param scheduleJob* @throws SchedulerException*/public void deleteJob(ScheduleJob scheduleJob) throws SchedulerException {Scheduler scheduler = schedulerFactoryBean.getScheduler();JobKey jobKey = JobKey.jobKey(scheduleJob.getName(), scheduleJob.getGroup());scheduler.deleteJob(jobKey);}/*** 立即执行job* * @param scheduleJob* @throws SchedulerException*/public void runAJobNow(ScheduleJob scheduleJob) throws SchedulerException {Scheduler scheduler = schedulerFactoryBean.getScheduler();JobKey jobKey = JobKey.jobKey(scheduleJob.getName(), scheduleJob.getGroup());scheduler.triggerJob(jobKey);}/*** 更新job时间表达式* * @param scheduleJob* @throws SchedulerException*/public void updateJobCron(ScheduleJob scheduleJob) throws SchedulerException {Scheduler scheduler = schedulerFactoryBean.getScheduler();TriggerKey triggerKey = TriggerKey.triggerKey(scheduleJob.getName(), scheduleJob.getGroup());CronTrigger trigger = (CronTrigger) scheduler.getTrigger(triggerKey);CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(scheduleJob.getCron());trigger = trigger.getTriggerBuilder().withIdentity(triggerKey).withSchedule(scheduleBuilder).build();scheduler.rescheduleJob(triggerKey, trigger);}public static void main(String[] args) {CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule("xxxxx");}}
Quartz 版本为 Quartz 2.2.3:http://d2zwv9pap9ylyd.cloudfront.net/quartz-2.2.3-distribution.tar.gz