Hi, group
I want to create a webservice that serves as a facade to query information on my system. Something like:
@Stateless()
@WebService()
public class Facade {
@PersistenceContext
private EntityManager em;
/**
* Web service operation
*/
@WebMethod
public Customer getCustomer(@WebParam(name = "id") String id) {
Customer c = em.find(Customer.class, id);
System.out.println("Selected Customer: "+c);
return c;
}
/**
* Web service operation
*/
@WebMethod
public Channel getChannel(@WebParam(name = "id") Integer id) {
Channel c = em.find(Channel.class, id);
System.out.println("Selected Channel: "+c);
return c;
}
}
The problem is that my Customer and Channel entitys has relations and I must detach the entity berfore returning it.
The question is: how can I do this safely? Is right put the statement "em.clear()" before returning? Is the use of "em.clear()" thread safe? or the "EntityManager" is the same instance and has the same persistence context for two concurrent calls?
Any help will be appreciate.
Thanks.
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