JPA and Threads in play framework

Question

I\'m trying to create a multithreading server. The problem is that I get the following error: play.exceptions.JPAException: The JPA context is not initialized. JPA Entit

Answer 1

Don't use plain thread, use jobs instead :

@OnApplicationStart 
public class MainLoop extends Job { 
       public void doJob() { 
               new BallJob().now(); 
       }
} 

And BallJob :

public class BallJob extends Job {
public void doJob() {
    List balls;
    new Ball(5,5,2,2,10,15);
    while (true){
        balls = Ball.all().fetch(); 
        for (Iterator iterator = balls.iterator(); iterator.hasNext();) {
            Ball ball = (Ball) iterator.next();
            ball.applyForces();
        }
    }
}