Spring batch launches SimpleJobLauncher run method before boot run method

问题

I have job configuration as below

@SpringBootApplication
public class Test implements CommandLineRunner {

    @Autowired
    JobLauncher jobLauncher;

    @Autowired
    Job job;

    @Autowired
    private JobBuilderFactory jobs;

    @Autowired
    private StepBuilderFactory steps;

    public static void main(String[] args) {
        SpringApplication.run(Test.class, args);
    }

    @Override
    public void run(String... args) throws Exception {
        JobParameters params = new JobParametersBuilder()
                .addString("JobID", String.valueOf(System.currentTimeMillis()))
                .toJobParameters();
        jobLauncher.run(job, params);
    }
}

Now, the problem is that when i run this Test application, SimpleJobLauncher launches run method before JobParameters are created. From logs

10:12:58.422 - [    main] - INFO  SimpleJobLauncher                        - Job: [SimpleJob: [name=demoJob]] launched with the following parameters: [{}]
10:12:58.466 - [    main] - INFO  SimpleStepHandler                        - Step already complete or not restartable, so no action to execute: StepExecution: id=14, version=3, name=stepOne, status=COMPLETED, exitStatus=COMPLETED, readCount=0, filterCount=0, writeCount=0 readSkipCount=0, writeSkipCount=0, processSkipCount=0, commitCount=1, rollbackCount=0, exitDescription=
10:12:58.478 - [    main] - INFO  SimpleStepHandler                        - Step already complete or not restartable, so no action to execute: StepExecution: id=15, version=3, name=stepTwo, status=COMPLETED, exitStatus=COMPLETED, readCount=0, filterCount=0, writeCount=0 readSkipCount=0, writeSkipCount=0, processSkipCount=0, commitCount=1, rollbackCount=0, exitDescription=
10:12:58.498 - [    main] - INFO  SimpleJobLauncher                        - Job: [SimpleJob: [name=demoJob]] completed with the following parameters: [{}] and the following status: [COMPLETED] in 44ms
10:12:58.530 - [    main] - INFO  SimpleJobLauncher                        - Job: [SimpleJob: [name=demoJob]] launched with the following parameters: [{JobID=1592381578499}]

As you can see from the logs first demoJob is launched with no parameters

10:12:58.422 - [    main] - INFO  SimpleJobLauncher                        - Job: [SimpleJob: [name=demoJob]] launched with the following parameters: [{}]

After finishing job with no parameters the it launches again with parameters.

10:12:58.530 - [    main] - INFO  SimpleJobLauncher                        - Job: [SimpleJob: [name=demoJob]] launched with the following parameters: [{JobID=1592381578499}]

Lets say if there two jobs in application, then both jobs are launched eventhough i want to run a specific one with specified parameters Is there anyway to control this behaviour so Spring batch only launches only job with parameters i need

回答1:

You can disable automatic execution of jobs at startup by adding a property to application.yml or application.properties

spring.batch.job.enabled: false

来源：https://stackoverflow.com/questions/62424538/spring-batch-launches-simplejoblauncher-run-method-before-boot-run-method

标签

java

spring-boot

spring-batch