SpringBoot使用SchedulingConfigurer实现多个定时任务多机器部署问题(推荐)
小志的博客 人气:0一、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
在使用SchedulingConfigurer实现多个定时任务的示例基础上(即此博文链接的基础上)进行新增代码
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("${upload.taskOnecron}") private String taskOnecron; @Override public String getCron() { return taskOnecron; } @Override public void execute() { log.info("定时任务一(每天几点几分执行一次),执行开始时间:{}",Calendar.getInstance().getTime()); } @Override @RedisLock(lockKey = "run",TimeOut = 60) public void run() { execute(); } }
3.2.8、在定时任务二中添加自定义注解
定时任务二中添加自定义注解,如下图:
完整代码如下:
package com.xz.jdk11.schedule; import com.xz.jdk11.schedule.aop.RedisLock; import lombok.extern.slf4j.Slf4j; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Component; import java.util.Calendar; /** * @author xz * @description 定时任务一(每几分钟执行一次,共执行几次) */ @Slf4j @Component public class TaskTwo implements BaskTask{ @Value("${upload.taskTwocron}") private String taskTwocron; @Override public String getCron() { return taskTwocron; } @Override public void execute() { log.info("定时任务二:每几分钟执行一次,执行开始时间:{}", Calendar.getInstance().getTime()); } @Override @RedisLock(lockKey = "run",TimeOut = 60) public void run() { execute(); } }
3.3、本地尝试运行springboot项目查看输出结果
输出结果如下所示:
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