SpringBoot使用SchedulingConfigurer实现多个定时任务多机器部署问题

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目录

一、使用SchedulingConfigurer实现多个定时任务

二、定时任务多机器部署解决方案

  • 方式一:拆分,单独拆分出来,单独跑一个应用
  • 方式二:基于aop拦截处理(抢占执行),只要有一个执行,其它都不执行(前提:服务器时间一致)

三、基于redis实现的代码示例

3.1、基于redis实现的概述

  • 定时任务Aop一样可以处理的,多台同个任务类似抢占,先抢到的则打标识记录在Redis中,根据有无标识去执行任务

3.2、基于redis实现的代码

3.2.1、代码目录结构

  • 目录结构如下图:

3.2.2、引入依赖包

  • pom文件引入依赖包

    <!-- Redis 配置 排除默认启动-->
     <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-data-redis</artifactId>
         <exclusions>
             <exclusion>
                 <groupId>redis.clients</groupId>
                 <artifactId>jedis</artifactId>
             </exclusion>
         </exclusions>
     </dependency>
     <!--redis连接池-->
     <dependency>
         <groupId>org.apache.commons</groupId>
         <artifactId>commons-pool2</artifactId>
         <version>2.9.0</version>
     </dependency>
     <!--jedis-->
     <dependency>
         <groupId>redis.clients</groupId>
         <artifactId>jedis</artifactId>
         <version>2.9.0</version>
     </dependency>
     <!--aspectj-->
     <dependency>
         <groupId>org.aspectj</groupId>
         <artifactId>aspectjweaver</artifactId>
         <version>1.9.7</version>
     </dependency>
    

3.2.3、配置文件新增redis连接配置

  • application.yml配置文件配置

    upload:
    	#每天几点几分执行
    	taskOnecron: 0 25 22 ? * *
    	#每2分钟执行一次
    	taskTwocron: 0 0/2 * * * ?
    spring:
        redis:
            #数据库索引
            database: 0
            host: 127.0.0.1
            port: 6379
            password:
            jedis:
                pool:
                    #最大连接数
                    max-active: 8
                    #最大阻塞等待时间(负数表示没限制)
                    max-wait: -1
                    #最大空闲
                    max-idle: 8
                    #最小空闲
                    min-idle: 0
                    #连接超时时间
            timeout: 10000
    

3.2.4、自定义redis锁注解类

  • 自定义redis锁注解

    package com.xz.jdk11.schedule.aop;
    
    import java.lang.annotation.*;
    import java.util.concurrent.TimeUnit;
    
    /**
     * @author xz
     * @description 自定义redis锁注解
     */
    @Retention(RetentionPolicy.RUNTIME)
    @Target(ElementType.METHOD)
    @Documented
    public @interface RedisLock 
        //锁前缀
        String lockPrefix() default "SCHEDULE_REDISLOCK:";
        //键
        String lockKey() default "";
        //默认超时时间(秒)
        long TimeOut() default 60;
        //默认超时时间单位 (秒)
        TimeUnit timeUtil() default TimeUnit.SECONDS;
    
    

3.2.5、自定义redis切面类(即aop类)

  • redis切面类

    package com.xz.jdk11.schedule.aop;
    
    import cn.hutool.core.util.StrUtil;
    import org.aspectj.lang.ProceedingJoinPoint;
    import org.aspectj.lang.annotation.Around;
    import org.aspectj.lang.annotation.Aspect;
    import org.aspectj.lang.annotation.Pointcut;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Component;
    
    import java.lang.reflect.Method;
    import java.util.HashMap;
    import java.util.Map;
    
    /**
     * @author xz
     * @description redis锁切面
     */
    @Aspect
    @Component
    public class RedisLockAspect 
        private static final Logger log = LoggerFactory.getLogger(RedisLock.class);
    
        //最大重试次数
        private static final Integer MAX_RETRY_COUNT=3;
        //锁前缀
        private static final String LOCK_PRE_FIX="lockPreFix";
        //键
        private static final String LOCK_KEY="lockKey";
        //超时时间
        private static final String TIME_OUT="timeOut";
        //保护时间 2*2^11 =4096
        private static final int PROTECT_TIME= 2 << 11;
    
        @Autowired
        private CommonRedisHelper commonRedisHelper;
    
        //切点
        @Pointcut("@annotation(com.xz.jdk11.schedule.aop.RedisLock)")
        public void RedisLockAspect()
    
        
    
        //通知
        @Around(value="RedisLockAspect()")
        public void lockRoundAction(ProceedingJoinPoint proceeding)
            //获取redis锁
            boolean flag = this.getLock(proceeding, 0, System.currentTimeMillis());
            if(flag)
                try 
                    proceeding.proceed();
                    Thread.sleep(PROTECT_TIME);
                 catch (Throwable e) 
                    throw new RuntimeException("定时任务======>>>redis分布式锁执行发生异常:"+e.getMessage(),e);
                finally 
                    //删除锁
                    this.delLock(proceeding);
                
            else
                log.info("定时任务======>>>其他服务器正在执行此定时任务");
            
        
    
        /**
         * 获取锁
         */
        private boolean getLock(ProceedingJoinPoint proceeding,int count,long currentTime)
            //获取锁参数
            Map<String, Object> annotationArgs = this.getAnnotationArgs(proceeding);
            String  lockPreFix = (String) annotationArgs.get(LOCK_PRE_FIX);
            String  lockKey = (String) annotationArgs.get(LOCK_KEY);
            long  timeOut = (Long) annotationArgs.get(TIME_OUT);
            if(StrUtil.isEmpty(lockPreFix) || StrUtil.isEmpty(lockKey))
                throw  new RuntimeException("定时任务======>>>RedisLock 锁前缀(LOCK_PRE_FIX)或者锁名(LOCK_KEY)未设置");
            
            if(commonRedisHelper.setNx(lockPreFix,lockKey,timeOut))
                log.info("定时任务======>>>RedisLock:线程,已获取到锁",Thread.currentThread().getName());
                return true;
            else
                //如果当前时间与锁的时间差,大于保护时间,则强制删除锁(防止死锁)
                long creatTime = commonRedisHelper.getLockValue(lockPreFix, lockKey);
                if((currentTime - creatTime) >timeOut * 1000 + PROTECT_TIME)
                    count ++;
                    if(count > MAX_RETRY_COUNT)
                        return  false;
                    
                    commonRedisHelper.delete(lockPreFix,lockKey);
                    getLock(proceeding,count,currentTime);
                
                log.info("定时任务======>>>正在执行定时任务key:",lockKey);
                log.info("定时任务======>>>RedisLock====线程,获取锁失败",Thread.currentThread().getName());
                return false;
            
        
    
        /**
         * 删除锁
         */
        private void delLock(ProceedingJoinPoint proceedingJoinPoint)
            //获取锁参数
            Map<String, Object> annotationArgs = this.getAnnotationArgs(proceedingJoinPoint);
            String  lockPreFix = (String) annotationArgs.get(LOCK_PRE_FIX);
            String  lockKey = (String) annotationArgs.get(LOCK_KEY);
            //删除锁
            commonRedisHelper.delete(lockPreFix,lockKey);
        
    
        /**
         * 获取锁参数
         * @param proceeding
         * */
        public Map<String,Object> getAnnotationArgs(ProceedingJoinPoint proceeding)
            Class<?> target = proceeding.getTarget().getClass();
            //获取所有方法
            Method[] methods = target.getMethods();
            //获取方法名称
            String methodName = proceeding.getSignature().getName();
            for(Method method:methods)
                if(method.getName().equals(methodName))
                    HashMap<String, Object> hashMap = new HashMap<>();
                    RedisLock redisLock = method.getAnnotation(RedisLock.class);
                    hashMap.put(LOCK_PRE_FIX,redisLock.lockPrefix());
                    hashMap.put(LOCK_KEY,redisLock.lockKey());
                    hashMap.put(TIME_OUT,redisLock.timeUtil().toSeconds(redisLock.TimeOut()));
                    return hashMap;
                
            
            return new HashMap<>();
        
    
    

3.2.6、自定义redis命令操作类

  • redis命令操作类

    package com.xz.jdk11.schedule.aop;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.data.redis.core.RedisTemplate;
    import org.springframework.data.redis.core.ValueOperations;
    import org.springframework.stereotype.Component;
    
    import java.util.concurrent.TimeUnit;
    
    /**
     * @author xz
     * @description redis命令操作类
     */
    @Component
    public class CommonRedisHelper 
        @Autowired
        RedisTemplate<Object,Object> redisTemplate;
        /**
         * 添加分布式锁
         * */
        public boolean setNx(String track,String sector,long timeout)
            boolean flag =false;
            ValueOperations<Object, Object> valueOperations = redisTemplate.opsForValue();
            flag=valueOperations.setIfAbsent(track+sector,System.currentTimeMillis());
            if(flag)
                valueOperations.set(track+sector,getLockValue(track,sector),timeout, TimeUnit.SECONDS);
            
            return flag;
        
    
        /**
         * 删除锁
         * @param lockPreFix 前缀
         * @param key 键
         * */
        public void delete(String lockPreFix,String key)
            redisTemplate.delete(lockPreFix+key);
        
    
        /**
         * 查询锁
         * @return 写锁时间
         * */
        public long getLockValue(String track,String sector)
            return (long) redisTemplate.opsForValue().get(track+sector);
        
    
    

3.2.7、在定时任务一中添加自定义注解

  • 定时任务一中添加自定义注解,如下图:

  • 完整代码如下:

    package com.xz.jdk11.schedule;
    
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.stereotype.Component;
    import java.util.Calendar;
    
    /**
     * @author xz
     * @description 定时任务一(每天几点几分执行)
     */
    @Slf4j
    @Component
    public class TaskOne implements BaskTask
        @Value("$upload.taskOnecron")
        private String taskOnecron;
    
        @Override
        public String getCron() 
            return taskOnecron;
        
    
        @Override
        public void execute() 
            log.info("定时任务一(每天几点几分执行一次),执行开始时间:",Calendar.getInstance().getTime());
        
        @Override
        @RedisLock(lockKey = "run",TimeOut = 60)
        public void run() 
            execute();
        
    
    
    

3.2.8、在定时任务二中添加自定义注解