如何动态地控制定时任务的调度

首先定义一个接口

import org.springframework.scheduling.Trigger;

public interface DynamicCustomTask extends Runnable{
    public Trigger getTrigger();
    public String getCron();
}

随后进行定义配置类

@Component
@Slf4j
public class DynamicSchedulingConfiguraion implements SchedulingConfigurer{
    
    @Override
    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
        通过容器工具类将该接口的所有实现类找出。
        List<DynamicCustomTask> tasks = ApplicationContextUtils.getBeanList(DynamicCustomTask.class);
        if(CollectionUtils.isEmpty(tasks)) {
            return;
        }

        tasks.forEach(task -> {
            将任务进行注册
            taskRegistrar.addTriggerTask(() -> {
                try {
                    task.run();
                } catch (Exception e) {
                    log.error("定时任务%s运行时出现异常，内容为%s", task.getClass().getName(), e.getMessage());
                }
            }, task.getTrigger());
        });
    }

}

写个demo

@Component
public class DemoOne implements DynamicCustomTask{
    
    public static volatile String cron = "0/1 * * * * ?";
    
    @Override
    public void run() {
        System.out.println("任务执行中" + new Date().toString());
    }

    @Override
    public Trigger getTrigger() {
        Trigger trigger = new Trigger() {
            @Override
            public Date nextExecutionTime(TriggerContext triggerContext) {
                CronTrigger trigger = new CronTrigger(getCron());
                Date nextExec = trigger.nextExecutionTime(triggerContext);
              return nextExec;
            }
        };
        return trigger;
    }

    @Override
    public String getCron() {
        return cron;
    }

}

测试方法

    @Test
    public void test() throws InterruptedException {
        while(true) {
            Thread.sleep(1000);
            DemoOne.cron = "0/10 * * * * ?";
        }
    }

运行结果