How to control the number of parallel Spring Batch jobs

Question

I have a report generating application. As preparation of such reports is heavyweight, they are prepared asynchronously with Spring Batch. Requests for such reports are crea

Answer 1

SimpleAsyncTaskExecutor isn't recommended for heavy use since it spawns a new thread with each task. It also does not support more robust concepts like thread pooling and queueing of tasks.

If you take a look at the ThreadPoolTaskExecutor, it supports a more robust task execution paradigm with things like queueing of tasks and using a thread pool instead of spawning random, un-reused threads.

You can read more about the ThreadPoolTaskExecutor in the javadoc here: http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/scheduling/concurrent/ThreadPoolTaskExecutor.html

Answer 2

That helped, many thanks. After replacing SimpleAsyncTaskExecutor I have exactly what I need. Code:

@Bean
public TaskExecutor jobLauncherTaskExecutor() {
    ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
    executor.setMaxPoolSize(executorsPoolSize);
    executor.setCorePoolSize(executorsPoolSize);
    return executor;
}

Thanks f