多任务情况下,quartz更容易管理,可以实现动态配置 
执行时间表达式: 

表达式示例: 

微服务启动时 必须加上@EnableScheduling

下面是单纯schedule 用法,简单

@Scheduled(cron="0/5 * * * * ?")
    public void job(){
        System.out.println("每五秒执行一次");
    }

集成Quartz

pom依赖   因为已经有这个日志文件,所以排除掉

		<dependency>
			<groupId>org.quartz-scheduler</groupId>
			<artifactId>quartz</artifactId>
			<version>2.2.1</version>
			<exclusions>
				<exclusion>
					<artifactId>slf4j-api</artifactId>
					<groupId>org.slf4j</groupId>
				</exclusion>
			</exclusions>
		</dependency>

下面直接上代码,其实都比较好理解 

/**
 * 
 */
package com.matrix.cloud.service.impl;

import java.util.Map;

import org.quartz.CronExpression;
import org.quartz.CronScheduleBuilder;
import org.quartz.Job;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.JobKey;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.Trigger;
import org.quartz.TriggerBuilder;
import org.quartz.TriggerKey;
import org.quartz.impl.StdSchedulerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;



/**
 * @author lmc
 * 2018年12月14日
 * ApplicationContextAware  两个地方都实现了此接口,初始化工作
 * 任务的删除和修改停止等方法都有, 然后封装一下对外提供接口就行 在controller写接口
 */
@Component
@Scope("singleton")
public class QuartzManager implements ApplicationContextAware {

    private Logger logger = LoggerFactory.getLogger(QuartzManager.class);

	private static SchedulerFactory schedulerFactory = new StdSchedulerFactory();

    private static final String JOB_DEFAULT_GROUP_NAME = "JOB_DEFAULT_GROUP_NAME";

    private static final String TRIGGER_DEFAULT_GROUP_NAME = "TRIGGER_DEFAULT_GROUP_NAME";


    private ApplicationContext applicationContext;

    private Scheduler scheduler;

    @Autowired
    private AutowiringSpringBeanJobFactory autowiringSpringBeanJobFactory;
    
    public void start() {
        //启动所有任务
        try {
            this.scheduler = schedulerFactory.getScheduler();
            scheduler.setJobFactory(autowiringSpringBeanJobFactory);
            //启动所有任务,这里获取AbstractTask的所有子类,继承的关系,取得所有子任务
            Map<String, AbstractTask> tasks =  applicationContext.getBeansOfType(AbstractTask.class);
            tasks.forEach((k, v) -> {
                String cronExpression = v.getCronExpression();
                if (cronExpression != null) {
                    addJob(k, v.getClass().getName(), cronExpression);
                }
            });
            logger.info("start jobs finished.");
        } catch (SchedulerException e) {
            logger.error(e.getMessage(), e);
            throw new RuntimeException("init Scheduler failed");
        }
    }
    
    /*
     *  增加定时任务
	 */
    public boolean addJob(String jobName, String jobClass, String cronExp) {
        boolean result = false;
        if (!CronExpression.isValidExpression(cronExp)) {
            logger.error("Illegal cron expression format({})", cronExp);
            return result;
        }
        try {
            JobDetail jobDetail = JobBuilder.newJob().withIdentity(new JobKey(jobName, JOB_DEFAULT_GROUP_NAME))
                    .ofType((Class<Job>) Class.forName(jobClass))
                    .build();
            Trigger trigger = TriggerBuilder.newTrigger()
                    .forJob(jobDetail)
                    .withSchedule(CronScheduleBuilder.cronSchedule(cronExp))
                    .withIdentity(new TriggerKey(jobName, TRIGGER_DEFAULT_GROUP_NAME))
                    .build();
            scheduler.scheduleJob(jobDetail, trigger);
            scheduler.start();
        } catch (Exception e) {
            logger.error(e.getMessage(), e);
            logger.error("QuartzManager add job failed");
        }
        return result;
    }
    
    /*
     *  更新定时任务
	 */
    public boolean updateJob(String jobName, String cronExp) {
        boolean result = false;
        if (!CronExpression.isValidExpression(cronExp)) {
            logger.error("Illegal cron expression format({})", cronExp);
            return result;
        }
        JobKey jobKey = new JobKey(jobName, JOB_DEFAULT_GROUP_NAME);
        TriggerKey triggerKey = new TriggerKey(jobName, TRIGGER_DEFAULT_GROUP_NAME);
        try {
            if (scheduler.checkExists(jobKey) && scheduler.checkExists(triggerKey)) {
                JobDetail jobDetail = scheduler.getJobDetail(jobKey);
                Trigger newTrigger = TriggerBuilder.newTrigger()
                        .forJob(jobDetail)
                        .withSchedule(CronScheduleBuilder.cronSchedule(cronExp))
                        .withIdentity(new TriggerKey(jobName, TRIGGER_DEFAULT_GROUP_NAME))
                        .build();
                scheduler.rescheduleJob(triggerKey, newTrigger);
                result = true;
            } else {
                logger.error("update job name:{},group name:{} or trigger name:{},group name:{} not exists..",
                        jobKey.getName(), jobKey.getGroup(), triggerKey.getName(), triggerKey.getGroup());
            }
        } catch (SchedulerException e) {
            logger.error(e.getMessage(), e);
            logger.error("update job name:{},group name:{} failed!", jobKey.getName(), jobKey.getGroup());
        }
        return result;
    }

    /* 
     * 删除定时任务
	 */
    public boolean deleteJob(String jobName) {
        boolean result = false;
        JobKey jobKey = new JobKey(jobName, JOB_DEFAULT_GROUP_NAME);
        try {
            if (scheduler.checkExists(jobKey)) {
                result = scheduler.deleteJob(jobKey);
            } else {
                logger.error("delete job name:{},group name:{} not exists.", jobKey.getName(), jobKey.getGroup());
            }
        } catch (SchedulerException e) {
            logger.error(e.getMessage(), e);
            logger.error("delete job name:{},group name:{} failed!", jobKey.getName(), jobKey.getGroup());
        }
        return result;
    }

	/* 
	 * 接口实现 初始化
	 */
	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		 this.applicationContext = applicationContext;
	}
	
}

交给spring IOC管理的方法

/**
 * 
 */
package com.matrix.cloud.service.impl;

import org.quartz.spi.TriggerFiredBundle;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.scheduling.quartz.SpringBeanJobFactory;
import org.springframework.stereotype.Component;

/**
 * @author lmc
 * 2018年12月14日
 * Job默认由Quartz管理,如果需要使用Spring容器管理bean,也就是依赖注入,
 * 需要指定JobFactory,也就是指定将Job由Spring容器管理。
 */
@Component
public class AutowiringSpringBeanJobFactory extends SpringBeanJobFactory implements ApplicationContextAware {
    private transient AutowireCapableBeanFactory beanFactory;

    @Override
    protected Object createJobInstance(TriggerFiredBundle bundle) throws Exception {
        final Object jobInstance = super.createJobInstance(bundle);
        beanFactory.autowireBean(jobInstance);
        return jobInstance;
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.beanFactory = applicationContext.getAutowireCapableBeanFactory();
    }

}

服务启动后,加载所有定时任务的接口

/**
 * 
 */
package com.matrix.cloud.service.impl;

import javax.annotation.PostConstruct;

import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.impl.StdSchedulerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Bean;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.stereotype.Component;

/**
 * @author lmc
 * 2018年12月14日
 * 
 * 此方法是为了启动服务的时候,自动运行定时任务start(),其中 还可以利用@PostConstruct启动,还有CommandLineRunner 接口实现也可以
 */
@Component
public class ApplicationStartQuartzJobListener implements ApplicationListener<ContextRefreshedEvent>{

	@Autowired
    private QuartzManager quartzManager;

    /**
     * 初始启动quartz
     */
    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {
        try {
        	quartzManager.start();
            System.out.println("任务已经启动...");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 初始注入scheduler
     * @return
     * @throws SchedulerException
     */
    @Bean
    public Scheduler scheduler() throws SchedulerException{
        SchedulerFactory schedulerFactoryBean = new StdSchedulerFactory();
        return schedulerFactoryBean.getScheduler(); 
    }

}

必须要实现 的接口,也就是任务的入口,为了后续好加载,我这里写在抽象类,任务启动直接获取所有子类任务


package com.matrix.cloud.service.impl;

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author lmc
 * 2018年12月14日
 * 定义抽象任务类AbstractTask,实现Job接口,子类Job实例需实现executeInternal方法。
 * 
 * 子类继承此方法,定时任务启动时可以拿到所有子类的方法,不需要去配置文件拿或者是数据库加定时任务
 */
public abstract class AbstractTask implements  Job{

	/* 
	 */
	 private Logger logger = LoggerFactory.getLogger(AbstractTask.class);

	    protected abstract void executeInternal(JobExecutionContext context);

	    protected String cronExpression;

	    @Override
	    public void execute(JobExecutionContext context) {
	        try {
	            executeInternal(context);
	        } catch (Exception e) {
	            logger.error(e.getMessage(), e);
	            logger.error("job execute failed!");
	        }
	    }

		/* 
		 * 定时任务表达式
		 */
	    public String getCronExpression() {
	        return cronExpression;
	    }

}

下面就是测试的TestDemo

/**
 * 
 */
package com.matrix.cloud.service.impl;

import javax.annotation.PostConstruct;

import org.quartz.JobExecutionContext;
import org.springframework.stereotype.Component;

/**
 * @author lmc
 * 2018年12月14日
 * 第二个定时任务, 继承AbstractTask实现 , 在任务启动的时候会去拿到所有子任务
 * 交给springIOC管理的话, 必须要注入进来,实例对象其实也就是定时任务名
 */
@Component("TestDemo2")
public class TestDemo2 extends AbstractTask {

	/* 
	 *  默认需要quartzManager.start();开启,然后默认是2秒执行一次
	 */
	    @PostConstruct
	    public void init() {
	        this.cronExpression = "0/2 * * * * ? ";
	    }

	@Override
	protected void executeInternal(JobExecutionContext context) {
		System.out.println("第二个任务的开始");
	}

}

下面是测试的类

@RunWith(SpringRunner.class)
@SpringBootTest
public class ElectronicFenceControllerTest {
    private Logger logger = LoggerFactory.getLogger(ElectronicFenceControllerTest.class);
	@Autowired
	RedisTemplate<String, String> redisTemplate;
	@Autowired
    private QuartzManager quartzManager;
    @Autowired
    private TestTask testTask;
	
	   @Test
	    public void tasksTest() throws Exception {
		    quartzManager.start();
	        TimeUnit.SECONDS.sleep(10);
	        logger.info("start update job");
	      //修改任务
	        quartzManager.updateJob("testTask", "0/3 * * * * ? ");
	        logger.info("end update job");
	        TimeUnit.SECONDS.sleep(10);
	        logger.info("start delete job");
	 }
}

主要还是写代码去理解运行原理,然后去实现各种不同场景的业务,

 

 

 

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