Quartz的信息持久化

           针对项目中的定时任务执行过程中，程序突然异常终止，重新启动，任务继续运行，那么需要将quartz进行持久化。针对网上的quartz的持久化多是和spring整合，由于项目中不一定采用spring做容器，所以没有采用网上千篇一律的和spring整合 的方式。

    1.首先说明一下我下载的quartz2.0版本，在quartz\docs\dbTables目录中选择mysql的脚本导入到数据库。

    2.配置quartz的持久化的配置文件quartz.properties.默认调度信息基于RAM的内存方式，重启之后调度状态信息丢失。

#============================================================================
# Configure Main Scheduler Properties  
#============================================================================

org.quartz.scheduler.instanceName: QuartzJdbcScheduler
org.quartz.scheduler.instanceId: AUTO

org.quartz.scheduler.skipUpdateCheck: true

#============================================================================
# Configure ThreadPool  
#============================================================================

org.quartz.threadPool.class: org.quartz.simpl.SimpleThreadPool
org.quartz.threadPool.threadCount: 3
org.quartz.threadPool.threadPriority: 5

#============================================================================
# Configure JobStore  
#============================================================================

org.quartz.jobStore.misfireThreshold: 60000

#org.quartz.jobStore.class: org.quartz.simpl.RAMJobStore

org.quartz.jobStore.class: org.quartz.impl.jdbcjobstore.JobStoreTX
org.quartz.jobStore.driverDelegateClass: org.quartz.impl.jdbcjobstore.StdJDBCDelegate
org.quartz.jobStore.useProperties: false
org.quartz.jobStore.dataSource: myDS
org.quartz.jobStore.tablePrefix: QRTZ_
org.quartz.jobStore.isClustered: false

#============================================================================
# Configure Datasources  
#============================================================================

org.quartz.dataSource.myDS.driver: com.mysql.jdbc.Driver
org.quartz.dataSource.myDS.URL: jdbc:mysql://localhost:3306/quartz
org.quartz.dataSource.myDS.user: root
org.quartz.dataSource.myDS.password: root
org.quartz.dataSource.myDS.maxConnections: 5

 

3.创建简单的job任务

package com.easyway.app.quartz.jdbc;

import java.util.Date;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
/**
 * 一个简单的定时任务
 * @author longgangbai
 *
 */
public class HelloJob implements Job {

    private static Logger _log = LoggerFactory.getLogger(HelloJob.class);
    public HelloJob() {
    }
    public void execute(JobExecutionContext context)
        throws JobExecutionException {

        _log.info("Hello World! - " + new Date());
    }

}

 

4.创建触发器并调度相关的任务

package com.easyway.app.quartz.jdbc;
import static org.quartz.CronScheduleBuilder.cronSchedule;
import static org.quartz.DateBuilder.evenMinuteDate;
import static org.quartz.JobBuilder.newJob;
import static org.quartz.TriggerBuilder.newTrigger;
import java.util.Date;
import org.quartz.CronTrigger;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerFactory;
import org.quartz.impl.StdSchedulerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 一个简单测试Quartz各种调度信息保存数据库的类
 *
 * @author longgangbai
 *
 */
public class ScheduleMain {

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

        log.info("------- Initializing ----------------------");

        // First we must get a reference to a scheduler
        SchedulerFactory sf = new StdSchedulerFactory();
        Scheduler sched = sf.getScheduler();
       
       
       
        log.info("------- Initialization Complete -----------");

        // computer a time that is on the next round minute
        Date runTime = evenMinuteDate(new Date());

        log.info("------- Scheduling Job  -------------------");

        // define the job and tie it to our HelloJob class
        JobDetail job = newJob(HelloJob.class)
            .withIdentity("job1", "group1")
            .build();
       
        // Trigger the job to run on the next round minute
        CronTrigger trigger = newTrigger()
        .withIdentity("trigger1", "group1")
        .withSchedule(cronSchedule("0/20 * * * * ?"))
        .startNow()
        .build();
       
        // Tell quartz to schedule the job using our trigger
        sched.scheduleJob(job, trigger);
        log.info(job.getKey() + " will run at: " + runTime); 

        // Start up the scheduler (nothing can actually run until the
        // scheduler has been started)
        sched.start();

        log.info("------- Started Scheduler -----------------");

        // wait long enough so that the scheduler as an opportunity to
        // run the job!
        log.info("------- Waiting 65 seconds... -------------");
        try {
            // wait 65 seconds to show job
            Thread.sleep(65L * 1000L);
            // executing...
        } catch (Exception e) {
        }

        // shut down the scheduler
        log.info("------- Shutting Down ---------------------");
        sched.shutdown(true);
        log.info("------- Shutdown Complete -----------------");
    }

    public static void main(String[] args) throws Exception {

        ScheduleMain example = new ScheduleMain();
        example.run();

    }

}