在Spring Boot中,可以使用Spring的任务调度框架来实现有条件地运行计划作业。下面是一个实现的步骤:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-quartz</artifactId>
</dependency>
org.quartz.Job
接口,并重写execute
方法。这个方法中编写具体的作业逻辑。import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
public class MyJob implements Job {
@Override
public void execute(JobExecutionContext context) throws JobExecutionException {
// 在这里编写作业逻辑
}
}
import org.quartz.JobDetail;
import org.quartz.Trigger;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.quartz.JobDetailFactoryBean;
import org.springframework.scheduling.quartz.SimpleTriggerFactoryBean;
@Configuration
public class SchedulerConfig {
@Bean
public JobDetailFactoryBean jobDetail() {
JobDetailFactoryBean factory = new JobDetailFactoryBean();
factory.setJobClass(MyJob.class);
factory.setDurability(true);
return factory;
}
@Bean
public SimpleTriggerFactoryBean trigger(JobDetail job) {
SimpleTriggerFactoryBean factory = new SimpleTriggerFactoryBean();
factory.setJobDetail(job);
factory.setStartDelay(0);
factory.setRepeatInterval(5000); // 设置触发器的重复间隔,单位为毫秒
return factory;
}
}
Scheduler
对象,并使用Scheduler
对象来启动和停止作业。import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.stereotype.Component;
@Component
public class MyJobRunner implements ApplicationRunner {
private final Scheduler scheduler;
@Autowired
public MyJobRunner(Scheduler scheduler) {
this.scheduler = scheduler;
}
@Override
public void run(ApplicationArguments args) throws SchedulerException {
// 根据条件判断是否启动作业
if (条件判断) {
scheduler.start();
} else {
scheduler.shutdown();
}
}
}
在上述代码中,根据具体的条件判断逻辑,决定是否启动作业。如果条件满足,则调用scheduler.start()
方法启动作业;如果条件不满足,则调用scheduler.shutdown()
方法停止作业。
这样,当应用启动时,作业将会根据条件有条件地运行或停止。
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