javaspring-bootthreadpoolexecutor

Best approach to allocate dedicated background thread in Spring Boot

I need to create a dedicated thread listening on DatagramSocket. Old school approach would be to create one during context creation:

@Bean
void beanDef() {
   var thread = new Thread(myRunnable);
   thread.setDaemon(true);
   thread.start();
}

More modern approach would be to create an executor:

@Bean
Executor() {
   var executor = Executors.newSingleThreadExecutor();
    executor.submit(myRunnable);
}

Which one should I prefer?

Solution

  • Something like this would be a modern way to launch a background thread in Spring:

    @Component
public class MySocketListenerLauncher {

 private ExecutorService executorService;

 @PostConstruct
 public void init() {

  BasicThreadFactory factory = new BasicThreadFactory.Builder()
    .namingPattern("socket-listener-%d").build();

  executorService = Executors.newSingleThreadExecutor(factory);
  executorService.execute(new Runnable() {

   @Override
   public void run() {
    // ... listen to socket ...
   }
  });

  executorService.shutdown();

 }

 @PreDestroy
 public void shutdown() {
  if (executorService != null) {
   executorService.shutdownNow();
  }
 }

}