spring整合quartz并持久化到mongodb

参考了https://www.itdaan.com/blog/2017/06/26/e6d6016d13d9bdfce53546516bc498b8.html

使用的spring boot版本是1.5.10
完整的pom文件如下:

    4.0.0

    org.example
    quartz_test
    1.0-SNAPSHOT

    
        8
        8
        4.3.9.RELEASE
    

    
        org.springframework.boot
        spring-boot-starter-parent
        1.5.10.RELEASE
    

    
        
            junit
            junit
            4.11
            test
        
        
            org.springframework
            spring-test
            test
        
        
            org.springframework
            spring-context
            ${springframework.version}
        
        
            org.springframework
            spring-context-support
            ${springframework.version}
        
        
            org.springframework
            spring-tx
            ${springframework.version}
        
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.quartz-scheduler
            quartz
            2.3.0
        
        
            com.novemberain
            quartz-mongodb
            2.1.0
        
        
            org.springframework.boot
            spring-boot-starter-data-mongodb
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

每个依赖都比较好理解,或许有用不到的依赖,暂时没有一一排查.
quartz.properties文件如下:

org.quartz.scheduler.instanceName=funScheduler
org.quartz.jobStore.class=com.novemberain.quartz.mongodb.MongoDBJobStore
org.quartz.jobStore.mongoUri=mongodb://localhost:27017
org.quartz.jobStore.dbName=somefun
org.quartz.jobStore.collectionPrefix=quartz
org.quartz.threadPool.threadCount=1

其中比较重要的就是threadCount属性,如果定时任务多于线程数,会导致misfire问题,在https://www.jianshu.com/p/acc777433963这篇文章中有讲.

代码部分,quartz使用的关键组件包括scheduler, job, trigger.

scheduler由SchedulerFactoryBean产生,代码如下

@Configuration
public class QuartzConfiguration {

    /**
     * Here we integrate quartz with Spring and let Spring manage initializing
     * quartz as a spring bean.
     * 
//   * @return an instance of {@link SchedulerFactoryBean} which will be managed
     *         by spring.
     */
    @Bean
    public SchedulerFactoryBean schedulerFactoryBean() {
        SchedulerFactoryBean scheduler = new SchedulerFactoryBean();
        scheduler.setApplicationContextSchedulerContextKey("applicationContext");
        scheduler.setConfigLocation(new FileSystemResource("config/quartz.properties"));
        scheduler.setWaitForJobsToCompleteOnShutdown(true);
        scheduler.setAutoStartup(true);
        scheduler.setStartupDelay(30);
        return scheduler;
    }
}

其中quartz.properties文件放在和jar包同级目录的config文件夹下(项目中也是如此);如果只是放在resources下, 可以用new ClassPathResource("quartz.properties"),根据情况来.
接下来是job,简单的一个打印:

public class BroadcastScheduleJobCore implements Job{


    @Override
    public void execute(JobExecutionContext context) {
        try {
            Object id = context.getMergedJobDataMap().get("id");
            System.out.println(id + "-start");
            Thread.sleep(10*1000);
            System.out.println(id + "-end");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

从context中获取id参数,打印出来;参数添加在下面创建任务的代码中.
创建任务并开始调度的关键代码如下:

    public static void createScheduleJob(Scheduler scheduler, String jobId) {
        try {
            //构建job信息
            JobDetail jobDetail = JobBuilder.newJob(BroadcastScheduleJobCore.class).withIdentity(getJobKey(jobId)).build();
            jobDetail.getJobDataMap().put("id", jobId);

            //表达式调度构建器
            CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule("0 31 * * * ? *")
                    .withMisfireHandlingInstructionFireAndProceed();

            //按新的cronExpression表达式构建一个新的trigger
            CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity(getTriggerKey(jobId)).withSchedule(scheduleBuilder).build();

            scheduler.scheduleJob(jobDetail, trigger);
            scheduler.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

把三个东西串起来的loader代码如下:

@Component
public class BroadcastLoader {

    private final Scheduler scheduler;

    @Autowired
    public BroadcastLoader(Scheduler scheduler) {
        this.scheduler = scheduler;
        init();
    }

    private void init() {
        String[] jobIds = new String[]{"id1", "id2"};
        for (String jobId:jobIds) {
            BroadcastScheduleUtil.createScheduleJob(scheduler, jobId);
        }
    }
}

到此直接启动Application类就可以从日志中看到任务执行,当然和你的cron设置有关.