How can I run a batch project with two independent jobs?

Question

I am starting to create a project in Spring Batch , I have created two different classes that have no relation to each other.

This is the NotificationOne.java class:

@Slf4j
public class NotificationOne {
   public NotificationDataOne {
      log.info("NotificationDataOne");
   }
}

This is the NotificationTwo.java class:

@Slf4j
public class NotificationOTwo {
   public NotificationDataTwo {
      log.info("NotificationDataTwo");
   }
}

And this is the kind of configuration that I currently have but I don't know how to complete it:

@Configuration
@EnableBatchProcessing
public class JobBatchConfiguration {
    
    @Autowired
    public JobBuilderFactory jobBuilderFactory;

    @Autowired
    public StepBuilderFactory stepBuilderFactory;
    
    @Bean
    public Job jobOne(NotificationOne notificationOne) {
      return jobBuilderFactory.get("jobOne").incrementer(new RunIdIncrementer())
          .listener(notificationOne).flow(null).end().build();
    }  

}

What I need is to be able to start both classes and configure it in the config class.

Answer 1

the only thing is to execute that class but I do not know how to create or modify the configuration case. Please can you tell me how can I launch the Job?

Here is an quick hello world job and how to launch it from a main method:

import org.springframework.batch.core.Job;
import org.springframework.batch.core.JobExecution;
import org.springframework.batch.core.JobExecutionListener;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
import org.springframework.batch.core.launch.JobLauncher;
import org.springframework.batch.repeat.RepeatStatus;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
@EnableBatchProcessing
public class MyJobConfiguration {

    @Bean
    public Job job(JobBuilderFactory jobs, StepBuilderFactory steps) {
        return jobs.get("job")
                .start(steps.get("step")
                        .tasklet((contribution, chunkContext) -> {
                            System.out.println("hello world");
                            return RepeatStatus.FINISHED;
                        })
                        .build())
                .listener(new NotificationOne())
                .build();
    }

    public static void main(String[] args) throws Exception {
        ApplicationContext context = new AnnotationConfigApplicationContext(MyJobConfiguration.class);
        JobLauncher jobLauncher = context.getBean(JobLauncher.class);
        Job job = context.getBean(Job.class);
        jobLauncher.run(job, new JobParameters());
    }

    static class NotificationOne implements JobExecutionListener {

        @Override
        public void beforeJob(JobExecution jobExecution) {
            System.out.println("NotificationOne.beforeJob");
        }

        @Override
        public void afterJob(JobExecution jobExecution) {
            System.out.println("NotificationOne.afterJob");
        }
    }

}

This prints:

NotificationOne.beforeJob
hello world
NotificationOne.afterJob