java - How to run spring-batch jobs threadpooled? -

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i'm starting spring-batch jobs using joblauncher.run(). question: how can threadpool invocations? eg maximum of 4 job threads may running concurrently, , further jobs queued?

    @autowired     private jobregistry registry;      @autowired     private joblauncher launcher;  job job = registry.getjob("jobname"); launcher.run(job, params); //immediately starts job

you can set threadpooltaskexecutor task executor used simplejoblauncher (the class launches jobs). executor has properties can set, maxpoolsize.

public joblauncher createjoblauncher() {     threadpooltaskexecutor taskexecutor = new threadpooltaskexecutor();     taskexecutor.setcorepoolsize(4);     taskexecutor.setmaxpoolsize(4);     taskexecutor.afterpropertiesset();      simplejoblauncher launcher = (simplejoblauncher) super.createjoblauncher();     launcher.settaskexecutor(taskexecutor);     return launcher; }

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