How can I run jobs after spring beans is initialized?

Question

I am working on Spring 4 mvc and hibernate I want to run code on the server startup that will use the get data from the database then do some business logic

where can I put my code I tried to put the code

    org.springframework.web.servlet.support.AbstractDispatcherServletInitializer.onStartup(ServletContext)

but I was not able to use @Autowired variables

          public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

        @Autowired
        TaskDAO task;
        @Override
        protected Class<?>[] getRootConfigClasses() {
            return new Class[] { SpringRootConfig.class };
        }

        @Override
        protected Class<?>[] getServletConfigClasses() {
            return new Class[] { SpringWebConfig.class };
        }

        @Override
        protected String[] getServletMappings() {
            return new String[] { "/" };
        }

        @Override
        public void onStartup(ServletContext servletContext) throws ServletException {
            task.getAllTasks()
            // TODO Auto-generated method stub
            super.onStartup(servletContext);
        }

    }

score 2 · Accepted Answer · edited May 23 '17 at 12:22

You are not able to autowire variables because your class is not managed by spring. So annotate your class with @Component annotation.

Then you can define a method that will do your logic (for example onStartup method) and annotate it with the @PostConstruct annotation as explained in this answers.

How to call a method after bean initialization is complete?

It will execute the method after the beans initialization.

This could be your class:

    @Component
    public class WebInitializer{
      @Autowire
      TaskDAO task;

      @PostConstruct
      private void onStartup(){
          task.getAllTasks();
          // Do whatever you want
    }
}

How can I run jobs after spring beans is initialized?

1 Answers1