quart动态执行定时任务

今天有个需求，前端可以将定时任务自定义保存到数据库，每天根据查询数据库来执行任务。

其实不用动态也是可以实现，但是。也是想试试动态执行定时任务看看怎么样的。

（1）建立一个QuartzManage类

package com.bsoft.homecare.schedule;

import org.quartz.*;

/**
 * @auther: wujj
 * @date: 2018/8/20 14:25
 * @description:
 */
public class QuartzManager {

    private Scheduler scheduler;

    /**
     * @Description: 添加一个定时任务
     *
     * @param jobName 任务名
     * @param jobGroupName  任务组名
     * @param triggerName 触发器名
     * @param triggerGroupName 触发器组名
     * @param jobClass  任务
     * @param cron   时间设置，参考quartz说明文档
     */
    @SuppressWarnings({ "unchecked", "rawtypes" })
    public void addJob(String jobName, String jobGroupName,
                       String triggerName, String triggerGroupName, Class jobClass, String cron) {
        try {
            // 任务名，任务组，任务执行类
            JobDetail jobDetail= JobBuilder.newJob(jobClass).withIdentity(jobName, jobGroupName).build();

            // 触发器
            TriggerBuilder<Trigger> triggerBuilder = TriggerBuilder.newTrigger();
            // 触发器名,触发器组
            triggerBuilder.withIdentity(triggerName, triggerGroupName);
            triggerBuilder.startNow();
            // 触发器时间设定
            triggerBuilder.withSchedule(CronScheduleBuilder.cronSchedule(cron));
            // 创建Trigger对象
            CronTrigger trigger = (CronTrigger) triggerBuilder.build();

            // 调度容器设置JobDetail和Trigger
            scheduler.scheduleJob(jobDetail, trigger);

            // 启动
            if (!scheduler.isShutdown()) {
                scheduler.start();
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * @Description: 修改一个任务的触发时间
     *
     * @param jobName
     * @param jobGroupName
     * @param triggerName 触发器名
     * @param triggerGroupName 触发器组名
     * @param cron   时间设置，参考quartz说明文档
     */
    public void modifyJobTime(String jobName,
                              String jobGroupName, String triggerName, String triggerGroupName, String cron) {
        try {
            TriggerKey triggerKey = TriggerKey.triggerKey(triggerName, triggerGroupName);
            CronTrigger trigger = (CronTrigger) scheduler.getTrigger(triggerKey);
            if (trigger == null) {
                return;
            }

            String oldTime = trigger.getCronExpression();
            if (!oldTime.equalsIgnoreCase(cron)) {
                /** 方式一 ：调用 rescheduleJob 开始 */
                // 触发器
                TriggerBuilder<Trigger> triggerBuilder = TriggerBuilder.newTrigger();
                // 触发器名,触发器组
                triggerBuilder.withIdentity(triggerName, triggerGroupName);
                triggerBuilder.startNow();
                // 触发器时间设定
                triggerBuilder.withSchedule(CronScheduleBuilder.cronSchedule(cron));
                // 创建Trigger对象
                trigger = (CronTrigger) triggerBuilder.build();
                // 方式一 ：修改一个任务的触发时间
                scheduler.rescheduleJob(triggerKey, trigger);
                /** 方式一 ：调用 rescheduleJob 结束 */

                /** 方式二：先删除，然后在创建一个新的Job  */
                //JobDetail jobDetail = scheduler.getJobDetail(JobKey.jobKey(jobName, jobGroupName));
                //Class<? extends Job> jobClass = jobDetail.getJobClass();
                //removeJob(jobName, jobGroupName, triggerName, triggerGroupName);
                //addJob(jobName, jobGroupName, triggerName, triggerGroupName, jobClass, cron);
                /** 方式二 ：先删除，然后在创建一个新的Job */
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * @Description: 移除一个任务
     *
     * @param jobName
     * @param jobGroupName
     * @param triggerName
     * @param triggerGroupName
     */
    public void removeJob(String jobName, String jobGroupName,
                          String triggerName, String triggerGroupName) {
        try {
            TriggerKey triggerKey = TriggerKey.triggerKey(triggerName, triggerGroupName);

            scheduler.pauseTrigger(triggerKey);// 停止触发器
            scheduler.unscheduleJob(triggerKey);// 移除触发器
            scheduler.deleteJob(JobKey.jobKey(jobName, jobGroupName));// 删除任务
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * @Description:启动所有定时任务
     */
    public void startJobs() {
        try {
            scheduler.start();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * @Description:关闭所有定时任务
     */
    public void shutdownJobs() {
        try {
            if (!scheduler.isShutdown()) {
                scheduler.shutdown();
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public Scheduler getScheduler() {
        return scheduler;
    }

    public void setScheduler(Scheduler scheduler) {
        this.scheduler = scheduler;
    }

}

　（2）配置一个MySchedule1 的定时任务

/**
 * @auther: wujj
 * @date: 2018/8/20 15:02
 * @description:
 */
public class MySchedule1 implements Job {
    @Override
    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        System.out.println(new Date() + ": ========job 111111 doing something...");
    }
}

 （3）定时任务起始类

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

import java.util.Date;

/**
 * @auther: wujj
 * @date: 2018/8/20 15:02
 * @description:
 */
public class MySchedule implements Job {

    public void doSomething(){
        System.out.println(new Date() + ": job master Online...");
    }

    @Override
    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        System.out.println("job doing something...");
    }

}

　　

（4）测试类

/**
 * @auther: wujj
 * @date: 2018/8/20 15:06
 * @description:
 */
public class testJob {

    public static void main(String[] args) throws BeansException {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("spring-quartz.xml");
        QuartzManager quartzManager = (QuartzManager) ctx.getBean("quartzManager");
        try {
            System.out.println("===============【系统启动】===============");

            Thread.sleep(5000);
            System.out.println("【增加job1启动】开始(每1秒输出一次)...");
            quartzManager.addJob("test", "test", "test", "test", MySchedule1.class, "0/1 * * * * ?");

            Thread.sleep(10000);
            System.out.println("【修改job1时间】开始(每3秒输出一次)...");
            quartzManager.modifyJobTime("test", "test", "test", "test", "0/3 * * * * ?");

            Thread.sleep(20000);
            System.out.println("【移除job1定时】开始...");
            quartzManager.removeJob("test", "test", "test", "test");

            Thread.sleep(5000);
            System.out.println("【增加job2启动】开始(每1秒输出一次)...");
            quartzManager.addJob("test", "test", "test", "test", MySchedule1.class, "0/1 * * * * ?");

            Thread.sleep(15000);

            // 关掉任务调度容器
            quartzManager.shutdownJobs();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

　　（5）配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"
	   default-lazy-init="true">

	<!-- 这个类用来做需要完成的业务-->
	<bean id="mySchedule" class="com.bsoft.homecare.schedule.MySchedule"/>

	<!-- 定时任务 -->
	<bean id="jobtask" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
		<!-- 调用的类  -->
		<property name="targetObject" ref="mySchedule" />
		<!-- 调用类中的方法  -->
		<property name="targetMethod" value="doSomething" />
		<!-- 是否并发  -->
		<property name ="concurrent" value ="false"  />
	</bean>

	<!-- 定义触发时间 ，这边就不同了，这里必须将时间设置成无限长，因为我们要去读取数据库的时间来做为定时器的触发时间-->
	<bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean ">
		<property name="jobDetail" ref="jobtask" />
		<!-- cron表达式  -->
		<!--每小时执行一次 -->
		<property name="cronExpression" value="0 0 * * * ? *" />
	</bean>

	<!-- 总管理类 如果将lazy-init='false'那么容器启动就会执行调度程序  -->
	<bean id="startQuertz" lazy-init="true" autowire="no" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
		<property name="triggers">
			<list>
				<ref bean="cronTrigger" />
			</list>
		</property>
	</bean>

	<!--这个类是用来设置触发时间的， startJobs方法启动调度容器，然后按照上面触发器每隔1s执行所配置的myJob2.doSomething()方法 -->
	<bean id="quartzManager" class="com.bsoft.homecare.schedule.QuartzManager" lazy-init="false" init-method="startJobs" >
		<!--这个对象一定要注入，这样类才能进行管理，还有在类型要用get set方法，不然会报错。-->
		<property name="scheduler" ref="startQuertz" />
	</bean>

</beans>