目录
- 一、背景
- 二、ShedLock是什么
- 三、落地实现
- 3.1 引入依赖包
- 3.2 配置数据库连接信息
- 3.3 创建mysql数据表
- 3.4 配置LockProvider
- 3.5 创建定时Job
- 四、结果分析
一、背景
在项目服务是集群部署的时候,代码在每个人都会有定时任务,但是如果让每个节点都去跑定时任务是不大合适的。SpringBoot 中的 ShedLock 可以很好解决这个问题,下面我将为大家详细介绍 SpringBoot 如何集成 ShedLock,而 ShedLock 又是如何实现分布式定时的。
二、ShedLock是什么
官方地址
以下是ShedLock锁提供者,通过外部存储实现锁,由下图可知外部存储集成的库还是很丰富:
本篇教程我们基于JdbcTemplate存储为例来使用ShedLock锁。
三、落地实现
3.1 引入依赖包
shedlock所需依赖包:
<!-- web工程依赖包 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>net.Javacrumbs.shedlock</groupId> <artifactId>shedlock-spring</artifactId> <version>4.2.0</version> </dependency> <!--每个外部存储实例所需依赖包不一样,这里是jdbc--> <dependency> <groupId>net.javacrumbs.shedlock</groupId> <artifactId>shedlock-provider-jdbc-template</artifactId> <version>4.2.0</version> </dependency> <dependencypython> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scophttp://www.devze.come>runtime</scope> </dependency>
依赖包树形图:
3.2 配置数据库连接信息
server:
port: 8105spring: datasource: url: jdbc:mysql://127.0.0.1:3306/testjdbc?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai username: root password: 123456 driver-class-name: com.mysql.cj.jdbc.Driver type: com.mysql.cj.jdbc.MysqlDataSource
3.3 创建Mysql数据表
CREATE TABLE `shedlock` ( `name` varchar(64) NOT NULL COMMENT 'name' , `lock_until` timestamp(3) NULL DEFAULT NULL , `locked_at` timestamp(3) NULL DEFAULT NULL , `locked_by` varchar(255) NULL DEFAULT NULL , PRIMARY KEY (`name`) ) ENGINE=InnoDB DEFAULT CHARACTER SET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=DYNAMIC ;
3.4 配置LockProvider
ShedLockConfig.java:
import net.javacrumbs.shedlock.core.LockProvider; import net.javacrumbs.shedlock.provider.jdbctemplate.JdbcTemplateLockProvider; import org.springframework.context.annotation.Bean; import org.springframework.stereotype.Component; import javax.annotation.Resource; import javax.sql.DataSource; /** * @description: Shedlock集成Jdbc配置类 */ @Component public class ShedLockConfig { @Resource private DataSource dataSource; @Bean private LockProvider lockProvider() { return new JdbcTemplateLockProvider(dataSource); } }
springboot主启动类MerakQuartzApplication:
import net.javacrumbs.shedlock.spring.annotation.EnableSchedulerLock; import org.myBATis.spring.annotation.MapperScan; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration; import org.springframework.context.annotation.Bean; import org.springframework.scheduling.annotation.EnableAsync; import org.springframework.scheduling.annotation.EnableScheduling; import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor; import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler; import java.util.concurrent.Executor; import java.util.concurrent.ThreadPoolExecutor; /** * @version 1.0 * @ClassName: MerakQuartzApplication * @description: 工单任务调度 */ // 开启定时器 @EnableScheduling // 开启定时任务锁,指定一个默认的锁的时间30秒 @EnableSchedulerLock(defaultLockAtMostFor = "PT30S") @EnableAsync @MapperScan(basePaWuJzxEckages = {"com.merak.hyper.automation.persist.**.mapper"}) @SpringBootApplication(scanBasePackages = {"com.merak.hyper.automation.**"}, exclude = {SecurityAutoConfiguration.class}) public class MerakQuartzApplication { public static final Logger log = LoggerFactory.getLogger(MerakQuartzApplication.class); public static void main(String[] args) { SpringApplication.run(MerakQuartzApplication.class, args); } private injst taskSchedulerCorePoolSize = 15; private int awaitTerminationSeconds = 60; private String threadNamePrefix = "taskExecutor-"; /** * @description: 实例化ThreadPoolTaskScheduler对象,用于创建ScheduledFuture<?> scheduledFuture */ @Bean public ThreadPoolTaskScheduler threadPoolTaskScheduler() { ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler(); taskScheduler.setPoolSize(taskSchedulerCorePoolSize); taskScheduler.setThreadNamePrefix(threadNamePrefix); taskScheduler.setWaitForTasksToCompleteOnShutdown(false); taskScheduler.setAwaitTerminationSeconds(awaitTerminationSeconds); /**需要实例化线程*/ taskScheduler.initialize(); // isinitialized = true; log.info("初始化ThreadPoolTaskScheduler ThreadNamePrefix=" + threadNamePrefix + ",PoolSize=" + taskSchedulerCorePoolSize + ",awaitTerminationSeconds=" + awaitTerminationSeconds); return taskScheduler; } /** * @description: 实例化ThreadPoolTaskExecutor对象,管理线程 */ @Bean("asyncTaskExecutor") public Executor taskExecutor() { ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor(); taskExecutor.setCorePoolSize(5); taskExecutor.setMaxPoolSize(50); taskExecutor.setQueueCapacity(200); taskExecutor.setKeepAliveSeconds(60); taskExecutor.setThreadNamePrefix("asyncTaskExecutor-"); taskExecutor.setWaitForTasksToCompleteOnShutdown(true); taskExecutor.setAwaitTerminationSeconds(60); //修改拒绝策略为使用当前线程执行 taskExecutor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy()); //初始化线程池 taskExecutor.initialize(); return taskExecutor; } }
3.5 创建定时Job
DigitalEmpTask:
package com.merak.hyper.automation.quartz.task; import net.javacrumbs.shedlock.spring.annotation.SchedulerLock; import org.slf4j.Logger; import org.slf4j.LoggerFactory; imp开发者_Python学习ort org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.scheduling.annotation.Scheduled; import org.springframework.ste编程客栈reotype.Component; import java.util.List; /** * @version 1.0 * @ClassName: BizOrderTask * @description: 任务队列服务调度 */ @Component public class DigitalEmpTask { public static final Logger log = LoggerFactory.getLogger(DigitalEmpTask.class); @Scheduled(cron = "0/30 * * * * ?") @SchedulerLock(name = "digitalEmpTaskScheduler", lockAtMostFor = "PT25S", lockAtLeastFor = "PT25S") protected void digitalEmpTaskScheduler() { log.info("云执行调度中心1:任务开始执行,时间:" + DateUtils.dateTimeNow(DateUtils.YYYY_MM_DD_HH_MM_SS)); try { } catch (Exception e) { log.error("云执行调度中心1调度失败,原因:" + e.getMessage()); } } }
四、结果分析
1.分别启动两个服务节点,配置如下:
server:
port: 12105 servlet: context-path: /automation-quartz-oneserver:
port: 12106 servlet: context-path: /automation-quartz-two
2.运行日志(片断)
节点automation-quartz-one 运行日志:
2023-02-22 12:01:00.143 [taskExecutor-1] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:01:002023-02-22 12:05:00.114 [taskExecutor-3] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:05:002023-02-22 12:05:30.122 [taskExecutor-6] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:05:302023-02-22 12:19:30.110 [taskExecutor-3] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:19:30节点automation-quartz-two运行日志:
2023-02-22 12:01:30.109 [taskExecutor-3] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:01:302023-02-22 12:02:00.101 [taskExecutor-1] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:02:002023-02-22 12:02:30.105 [taskExecutor-2] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:02:302023-02-22 12:03:00.118 [taskExecutor-3] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:03:002023-02-22 12:03:30.101 [taskExecutor-4] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:03:302023-02-22 12:04:00.110 [taskExecutor-1] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:04:002023-02-22 12:04:30.111 [taskExecutor-5] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:04:302023-02-22 12:06:00.114 [taskExecutor-13] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:06:002023-02-22 12:06:30.108 [taskExecutor-14] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:06:302023-02-22 12:07:00.114 [taskExecutor-15] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:07:002023-02-22 12:07:30.115 [taskExecutor-1] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:07:302023-02-22 12:08:00.102 [taskExecutor-5] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:08:002023-02-22 12:08:30.103 [taskExecutor-11] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:08:302023-02-22 12:09:00.099 [taskExecutor-6] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:09:002023-02-22 12:09:30.113 [taskExecutor-3] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:09:302023-02-22 12:10:00.107 [taskExecutor-7] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:10:002023-02-22 12:10:30.110 [taskExecutor-15] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:10:302023-02-22 12:11:00.111 [taskExecutor-1] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:11:002023-02-22 12:11:30.100 [taskExecutor-5] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:11:302023-02-22 12:12:00.112 [taskExecutor-11] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:12:002023-02-22 12:12:30.102 [taskExecutor-6] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:12:302023-02-22 12:13:00.097 [taskExecutor-3] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:13:002023-02-22 12:13:30.107 [taskExecutor-14] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:13:302023-02-22 12:14:00.111 [taskExecutor-4] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:14:002023-02-22 12:14:30.106 [taskExecutor-8] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:14:302023-02-22 12:15:00.095 [taskExecutor-9] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:15:002023-02-22 12:15:30.101 [taskExecutor-10] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:15:302023-02-22 12:16:00.105 [taskExecutor-2] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:16:002023-02-22 12:16:30.130 [taskExecutor-12] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:16:302023-02-22 12:17:00.107 [taskExecutor-13] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:17:002023-02-22 12:17:30.113 [taskExecutor-7] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:17:302023-02-22 12:18:00.104 [taskExecutor-15] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:18:002023-02-22 12:18:30.112 [taskExecutor-1] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:18:302023-02-22 12:19:00.103 [taskExecutor-5] INFO <DigitalEmpTask:46> - 云执行调度中心1:任务开始执行,时间:2023-02-22 12:19:00
3、shedlock表记录信息:
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