Java Spring Batch: How to Verify That Execution is Done in Parallel?

Question

With classic java multithreaded execution, the parallelized execution can be proved easily (see: SO: Java Thread Example) by calling

this.getId()

which results in a System.output.println():

[ID 9]
[ID 10]
[ID 8]

How can I prove that parallel execution really happens in Java Spring Batch/Spring Boot?

spring boot batch is completely new to me. So if it helps, I could use jobs — , Dec 27 '16 at 12:05

score 1 · Answer 1 · answered Dec 28 '16 at 09:31

Like the documentation describes you can configure jobs and steps.

To see which job or step is currently running you will give both a name.

@Configuration
@EnableBatchProcessing
@EnableAutoConfiguration
public class BatchConfiguration {

  @Autowired
  private JobBuilderFactory jobBuilderFactory;

  @Autowired
  private StepBuilderFactory stepBuilderFactory;

  @Bean
  public Step step1() {
    return stepBuilderFactory.get("step1")
        .tasklet(new Tasklet() {
          public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) {
            return null;
          }
        })
        .build();
  }

  @Bean
  public Job job(Step step1) throws Exception {
    return jobBuilderFactory.get("job1")
        .incrementer(new RunIdIncrementer())
        .start(step1)
        .build();
  }
}

And JobExecution has many information about your job.

Here some useful docs:

How can I use JobExecution from within a step? – Dec 28 '16 at 21:42 — , Dec 28 '16 at 21:42

score 0 · Accepted Answer · answered Dec 28 '16 at 21:41

0

a very generic way would be:

    Thread thread = Thread.currentThread();
    System.out.println(thread);

answered Dec 28 '16 at 21:41

Java Spring Batch: How to Verify That Execution is Done in Parallel?

2 Answers2