SpringBoot 实现动态添加定时任务功能

2024-04-02 19:55

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代码结构

1. 配置类

package com.orion.ops.config;
 
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;

@EnableScheduling
@Configuration
public class SchedulerConfig {
    @Bean
    public TaskScheduler taskScheduler() {
        ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();
        scheduler.setPoolSize(4);
        scheduler.setRemoveOnCancelPolicy(true);
        scheduler.setThreadNamePrefix("scheduling-task-");
        return scheduler;
    }
}

2. 定时任务类型枚举

package com.orion.ops.handler.scheduler;
 
import com.orion.ops.consts.Const;
import com.orion.ops.handler.scheduler.impl.ReleaseTaskImpl;
import com.orion.ops.handler.scheduler.impl.SchedulerTaskImpl;
import lombok.AllArgsConstructor;
import java.util.function.Function;

@AllArgsConstructor
public enum TaskType {
    
    RELEASE(id -> new ReleaseTaskImpl((Long) id)) {
        @Override
        public String getKey(Object params) {
            return Const.RELEASE + "-" + params;
        }
    },
     * 调度任务
    SCHEDULER_TASK(id -> new SchedulerTaskImpl((Long) id)) {
            return Const.TASK + "-" + params;
    ;
    private final Function<Object, Runnable> factory;
     * 创建任务
     *
     * @param params params
     * @return task
    public Runnable create(Object params) {
        return factory.apply(params);
    }
     * 获取 key
     * @return key
    public abstract String getKey(Object params);
}

这个枚举的作用是生成定时任务的 runnable 和定时任务的唯一值, 方便后续维护

3. 实际执行任务实现类

package com.orion.ops.handler.scheduler.impl;
 
import com.orion.ops.service.api.ApplicationReleaseService;
import com.orion.spring.SpringHolder;
import lombok.extern.slf4j.Slf4j;

@Slf4j
public class ReleaseTaskImpl implements Runnable {
    protected static ApplicationReleaseService applicationReleaseService = SpringHolder.getBean(ApplicationReleaseService.class);
    private Long releaseId;
    public ReleaseTaskImpl(Long releaseId) {
        this.releaseId = releaseId;
    }
    @Override
    public void run() {
        log.info("定时执行发布任务-触发 releaseId: {}", releaseId);
        applicationReleaseService.runnableAppRelease(releaseId, true);
}

4. 定时任务包装器

package com.orion.ops.handler.scheduler;
 
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.Trigger;
import java.util.Date;
import java.util.concurrent.ScheduledFuture;

public class TimedTask {
    
    private Runnable runnable;
     * 异步执行
    private volatile ScheduledFuture<?> future;
    public TimedTask(Runnable runnable) {
        this.runnable = runnable;
    }
     * 提交任务 一次性
     *
     * @param scheduler scheduler
     * @param time      time
    public void submit(TaskScheduler scheduler, Date time) {
        this.future = scheduler.schedule(runnable, time);
     * 提交任务 cron表达式
     * @param trigger   trigger
    public void submit(TaskScheduler scheduler, Trigger trigger) {
        this.future = scheduler.schedule(runnable, trigger);
     * 取消定时任务
    public void cancel() {
        if (future != null) {
            future.cancel(true);
        }
}

这个类的作用是包装实际执行任务, 以及提供调度器的执行方法

5. 任务注册器 (核心)

package com.orion.ops.handler.scheduler;
 
import com.orion.ops.consts.MessageConst;
import com.orion.utils.Exceptions;
import com.orion.utils.collect.Maps;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.stereotype.Component;
import javax.annotation.Resource;
import java.util.Date;
import java.util.Map;

@Component
public class TaskRegister implements DisposableBean {
    private final Map<String, TimedTask> taskMap = Maps.newCurrentHashMap();
    @Resource
    @Qualifier("taskScheduler")
    private TaskScheduler scheduler;
    
    public void submit(TaskType type, Date time, Object params) {
        // 获取任务
        TimedTask timedTask = this.getTask(type, params);
        // 执行任务
        timedTask.submit(scheduler, time);
    }
     * @param cron   cron
    public void submit(TaskType type, String cron, Object params) {
        timedTask.submit(scheduler, new CronTrigger(cron));
     * 获取任务
    private TimedTask getTask(TaskType type, Object params) {
        // 生成任务
        Runnable runnable = type.create(params);
        String key = type.getKey(params);
        // 判断是否存在任务
        if (taskMap.containsKey(key)) {
            throw Exceptions.init(MessageConst.TASK_PRESENT);
        }
        TimedTask timedTask = new TimedTask(runnable);
        taskMap.put(key, timedTask);
        return timedTask;
     * 取消任务
    public void cancel(TaskType type, Object params) {
        TimedTask task = taskMap.get(key);
        if (task != null) {
            taskMap.remove(key);
            task.cancel();
     * 是否存在
    public boolean has(TaskType type, Object params) {
        return taskMap.containsKey(type.getKey(params));
    @Override
    public void destroy() {
        taskMap.values().forEach(TimedTask::cancel);
        taskMap.clear();
}

这个类提供了执行, 提交任务的api, 实现 DisposableBean 接口, 便于在bean销毁时将任务一起销毁

6. 使用

    @Resource
    private TaskRegister taskRegister;
    
    
    @RequestMapping("/submit")
    @EventLog(EventType.SUBMIT_RELEASE)
    public Long submitAppRelease(@RequestBody ApplicationReleaseRequest request) {
        Valid.notBlank(request.getTitle());
        Valid.notNull(request.getAppId());
        Valid.notNull(request.getProfileId());
        Valid.notNull(request.getBuildId());
        Valid.notEmpty(request.getMachineIdList());
        TimedReleaseType timedReleaseType = Valid.notNull(TimedReleaseType.of(request.getTimedRelease()));
        if (TimedReleaseType.TIMED.equals(timedReleaseType)) {
            Date timedReleaseTime = Valid.notNull(request.getTimedReleaseTime());
            Valid.isTrue(timedReleaseTime.compareTo(new Date()) > 0, MessageConst.TIMED_GREATER_THAN_NOW);
        }
        // 提交
        Long id = applicationReleaseService.submitAppRelease(request);
        // 提交任务
            taskRegister.submit(TaskType.RELEASE, request.getTimedReleaseTime(), id);
        return id;
    }

最后

这是一个简单的动态添加定时任务的工具, 有很多的改造空间, 比如想持久化可以插入到库中, 定义一个 CommandLineRunner 在启动时将定时任务全部加载, 还可以给任务加钩子自动提交,自动删除等, 代码直接cv一定会报错, 就是一些工具, 常量类会报错, 改改就好了, 本人已亲测可用, 有什么问题可以在评论区沟通

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