在Spring Boot中，有什么方法可以在主方法中调用@Scheduled批注

Question

I just want to run my spring boot main method periodically by using @scheduler annotation. I have specified some additional code which will perform some pre-action before it enables REST services.

@EnableScheduling
@SpringBootApplication
public class SpringBootJDBCApp {

    @Autowired
    ITest testService;

    public static void main(String args[]) throws Exception  {
        PersistenceValidation.cloneGit();
        PersistenceValidation.dataPersistance();
        PersistenceValidation.cleanUp();
        ApplicationContext context = SpringApplication
                .run(SpringBootJDBCApp.class);
        ITest testService = context.getBean(ITestService.class);
        testService.getAllData();
    }
}

I want to run the above main method every 10seconds once. and Added @Schedule annotation at main method. But It throws an exception:

Expected behavior as per doc @Scheduler should be called a method which doesn't have args[]

I wanna use @Scheduler annotation in main method as below:

@Scheduled(initialDelay = 1000, fixedRate = 10000)
public static void main(String args[]) throws Exception {
    PersistenceValidation.cloneGit();
    PersistenceValidation.dataPersistance();
    PersistenceValidation.cleanUp();
    ApplicationContext context = SpringApplication.run(SpringBootJDBCApp.class);
    ITest testService = context.getBean(ITestService.class);
    testService.getAllData();
}

Error :

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'springBootJDBCApp': Initialization of bean failed; nested exception is java.lang.IllegalStateException: Encountered invalid @Scheduled method 'main': Only no-arg methods may be annotated with @Scheduled

Is there any other way to achieve this task? I wanna run the entire things which are mentioned in the main method periodically.

Any leads?

Answer 1

The scheduled method annotated with @Scheduled annotation must have no arguments because the annotation doesn't provide any input. The Spring-docs of @Scheduled sais:

The annotated method must expect no arguments. It will typically have a void return type; if not, the returned value will be ignored when called through the scheduler.

You annotated the method public static void main(String args[]) which has an array as an argument. You have to just wrap the content in the main(String args[]) into a different method. Note you don't use args[] at all.