[jboss-user] [JBoss Seam] - Re: Basic Seam questions

[lightbulb432]

I have made a simple example below that doesn't seem to be working. It creates an entity (Person) over two independent JSF action methods:

@Stateful
  | @Name("register")
  | public class RegisterBean implements Register {
  | 	 
  | 	@PersistenceContext(type=EXTENDED)
  | 	private EntityManager em;
  | 
  | 	@In(create=true) @Out
  | 	private Person person;
  | 	
  | 	private String firstName;
  | 	private String lastName;
  | 	
  | 	public String firstName() {
  | 
  | 		person.setFirstName(getFirstName());
  | 		
  | 		em.persist(person);
  | 		
  | 		return "success";
  | 
  | 	}
  | 	
  | 	public String lastName() {
  | 		
  | 		person.setLastName(getLastName());
  | 		
  | 		em.merge(person);
  | 		
  | 		return "success";
  | 
  | 	}
  | 	
  | 	@Remove
  | 	@Destroy
  | 	public void destroy() {
  | 		
  | 	}
  | 	
  | }

I have a few questions on this example, but first, am I doing this correctly? Do I have the persist() and merge() in the correct places? Or should I remove the persist() and merge() and just have one persist() in lastName() - assuming lastName() is the second method to be called?

Is an EXTENDED persistence context correct here?

I'm getting an error in the second method, saying that "Exception during INVOKE_APPLICATION(5): javax.persistence.PersistenceException: org.hibernate.PropertyValueException: not-null property references a null or transient value: "

Here's the problem. When I call the firstName() method, followed by the lastName() method, the lastName() method seems to create a brand new Person. This Person gets a lastName, does not pick up the firstName from the previous method invocation, and triggers a PropertyValueException because of the validation annotation on the entity...whoa!

What am I doing wrong? Any help would be greatly appreciated. Thanks.

P.S. I don't call the destroy() method anywhere in the code at all. And, while I define destroy in the business interface, I don't define the annotations there...should I?

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