Executing a job from a controller method

It's convenient to launch a job from a controller method when that job is triggered by a user action. For example, launching a job to process a video just uploaded by the user.

Getting ready

We'll use the job defined in the Creating a job recipe.

How to do it…

Follow these steps to execute the job from a controller method:

1. Add the Spring Batch configuration class to the getServletConfigClasses()method in your class extending AbstractAnnotationConfigDispatcherServletInitializer:

   public class ServletInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
   
   @Override
   protected Class<?>[] getServletConfigClasses() {
       return new Class<?>[]{AppConfig.class, BatchConfig.class};
   }

2. In your controller class, add a JobLauncher attribute and Job attribute both autowired:

   @Autowired
   JobLauncher jobLauncher;
   
   @Autowired
   Job job;

3. In the controller method, define the job parameters and launch the job:

   try {
     JobParametersBuilder jobParametersBuilder...