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我正在使用play framework和JPA。几乎没有消息传递给Akka Actor以进行异步处理。在异步过程中,我需要通过JPA连接我的数据库。如何在Akka actor中连接播放持久性(JPA)?
public class OrderCreation extends UntypedActor {
private EntityManagerFactory emFact = null;
private ActorSelection provisioner;
@Transactional(readOnly = false)
@Override
public void onReceive(Object order) throws Exception {
//HERE I need to do JPA related transactions
}
@Override
public void postStop() throws Exception {
}
@Override
public void preStart() throws Exception {
provisioner =getContext().actorSelection("/user/OrderProvisioner");
emFact = Persistence.createEntityManagerFactory("test-data-play");
}
}
我得到这个错误
[akka://application/user/OrderCreation] No EntityManager bound to this thread. Try wrapping this call in JPA.withTransaction, or ensure that the HTTP context is setup on this thread.
java.lang.RuntimeException: No EntityManager bound to this thread. Try wrapping this call in JPA.withTransaction, or ensure that the HTTP context is setup on this thread.
at play.db.jpa.JPA.em(JPA.java:58)
任何人有一个想法,JPA通过连接阿卡?
JPA和akka已经注意到了彼此。我不会注释onReceive方法,在那里寻找麻烦。 – Snickers3192
我通过使用JPA.withTransaction解决了这个问题,就像错误消息所述 – kopelitsa