how to select which spring batch job to run based on application argument - spring boot java config

Question

I have two independent spring batch jobs in the same project because I want to use the same infrastructure-related beans. Everything is configured in Java. I would like to know if there's a proper way to start the jobs independent based for example on the first java app argument in the main method for example. If I run SpringApplication.run only the second job gets executed by magic. The main method looks like:

@ComponentScan
@EnableAutoConfiguration
public class Application {

    public static void main(String[] args) {                
        SpringApplication app = new SpringApplication(Application.class);
        app.setWebEnvironment(false);
        ApplicationContext ctx= app.run(args);              
    }

}

and the two jobs are configured as presented in the Spring Batch Getting Started tutorial on Spring.io. Here is the configuration file of the first job, the second being configured in the same way.

@Configuration
@EnableBatchProcessing
@Import({StandaloneInfrastructureConfiguration.class, ServicesConfiguration.class})
public class AddPodcastJobConfiguration {

    @Autowired
    private JobBuilderFactory jobs;

    @Autowired
    private StepBuilderFactory stepBuilderFactory;
    //reader, writer, processor...

}

To enable modularization I created an AppConfig class, where I define factories for the two jobs:

@Configuration
@EnableBatchProcessing(modular=true)
public class AppConfig {

    @Bean
    public ApplicationContextFactory addNewPodcastJobs(){
        return new GenericApplicationContextFactory(AddPodcastJobConfiguration.class);
    }

    @Bean
    public ApplicationContextFactory newEpisodesNotificationJobs(){
        return new GenericApplicationContextFactory(NotifySubscribersJobConfiguration.class);
    }    

}

P.S. I am new to Spring configuration in Java configuration Spring Boot and Spring Batch...

Answer 1

Just set the "spring.batch.job.names=myJob" property. You could set it as SystemProperty when you launch your application (-Dspring.batch.job.names=myjob). If you have defined this property, spring-batch-starter will only launch the jobs, that are defined by this property.