How to start a thread inside spring container

Please help to resolve a problem. I have a thread like below the code.

public class A implements Runnable {

  public void run() {
     while(true) {
     //Do something something important
    }
  }

}

I want to configure this thread in spring configuration file in such a manner, so that when spring container gets started, the thread start running. It means I have to start the thread using th.start() in a class, but that will never be used. The thread should start without instantiating any bean from the container. It is not Timer task type functionality.