How to run a longrunning batch job on startup of tomcat server?

Question

I'm launching a spring-batch job on application start using

spring.batch.job.names=MyJob

@Configuration
public class MyJob {
    @Bean
    public Job testJob() throws IOException {
        return jobBuilderFactory.get(MyJob.class.getSimpleName())
                .start(import())
                .build();
    }
}

Unfortunately this somehow delays the tomcat server startup. The job has a runtime of several minutes, thus I'm getting the following error:

Server Tomcat v8.0 Server at localhost was unable to start within 45 seconds. If the server requires more time, try increasing the timeout in the server editor.

Question: how can I run this job without preventing tomcat to start up? Eg running the job async?

Depending on your current spring-batch config there are different ways to make this work. Could you post what you have right now? — Gergely Bacso, Jan 07 '16 at 13:33
It's just a simple job class, and as written the configured application.properties to launch the job. — membersound, Jan 07 '16 at 13:35

score 2 · Accepted Answer · answered Jan 07 '16 at 13:59

2

You can include a ServletContextListener.

Put your code in the contextInitialized method.

answered Jan 07 '16 at 13:59

Andres

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score 0 · Answer 2 · edited May 23 '17 at 10:28

0

You can use @Scheduled annotation configured with a fixedDelay.

See the Task Execution and Scheduling in the reference for more information.

I ended up using this solution to launch a cache warm up just at startup:

private boolean isFirstTime = true;

@Scheduled(fixedDelay = 60000)
protected void refreshCachesStartup(){
    if(isFirstTime){
        // your code

        isFirstTime = false;
    }
}

EDIT: see this question for a more specific view on the argument.

edited May 23 '17 at 10:28

Community

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1

answered Jan 07 '16 at 13:40

Marco Ferrari

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But a `fixedDelay`would execute periodically. I only want to run the job on startup. – membersound Jan 07 '16 at 13:48
Hm that feels like a hack. I could as well define a very very long fixedDelay period, but maybe there is a more elegant solution to this... – membersound Jan 07 '16 at 13:59
AFAIK there is no built-in way to do that. You may use Spring Boot's [@ConditionalXXX](https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-developing-auto-configuration.html) annotations (or implement your own) but the base idea stay the same. – Marco Ferrari Jan 07 '16 at 15:06

How to run a longrunning batch job on startup of tomcat server?

2 Answers2