How to start a daemon on server startup in spring


I want to start a daemon mail service thread on tomcat server startup. So, I have annotated a method with @Async annotation.

I have a class which implements a ApplicationListener interface. When I call my async method from this class, it never starts asynchronously and blocks the current thread. And When I call my async method from a spring controller class, It never blocks and starts asynchronously.

Why async method executed successfully from one class and not from the other class?

What am I doing wrong and How can I execute my async method on server startup??

Thanks in advance.

Edit: I tried using the InitializingBean interface, @PostConstruct, init-method approach to call my async method, but it never executed. Then I realized, my default lazy-init is true, So I make the lazy-init to false for my InitializingBean. Now it execute my asnyc method, but it blocks the current thread and now one more issue, I am facing is that My server didn’t stop gracefully, but I have to stop my server forcefully.


First of all You don’t need to implement ApplicationListener interface. You are working with Spring – Application context is enough.

Second you are talking about Spring @Async, it means that your task should be started from Application Context and Controller bean is a part of it.

You need to make sure that you have <annotation-driven> in your spring xml file.

You can start your task on @PostConstruct function:

public class SampleBeanImpl implements SampleBean {

  void doSomething() { … }

public class SampleBeanInititalizer {

  private final SampleBean bean;

  public void initialize() {

Answered By – danny.lesnik

This Answer collected from stackoverflow, is licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0

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