Calling entity bean mutators in client class and business methods in session Class?

[jashan07]

Hi,

I am migrating my ejb 2.1 application into ejb 3.0. I have done following changes:

	EJB 2.x	EJB3.0
1	Entity beans implements EntityBean having callback methods and abstract getters and setters.	Entitybeans with annotation @Entity, removing all callback methods and putting getters and setters
2	Home Interface containing business methods	removing Home Interface and putting business methods in Remote interface
3	Remote Interface having getters nad setters	Removed, putting getter and setters in Bean class
4	Session Bean	same but putting annotation @ stateless and changing jndis
5	Client class	same but changing jndi
6	ejb-jar.xml	Removing ejb-jar.xml
7	weblogic-cmp-rdbms-jar.xml	Removing weblogic-cmp-rdbms-jar.xml
8	weblogic-jar.xml	Removing weblogic-jar.xml

My doubts are :

1. There are some methods like findbyPrimarykey(int id) and findLoginDetails(int id) which are mapped with queries in ejb-jar.xml. We are writing these queries in Entity bean class using annotations. I was calling these methods in session bean class using Remote interface object in ejb 2.x but now in EJB 3.0 how to define these methods and call these methods in session bean , we are not using ejb-jar.xml anymore.

2. In my client class, i want to access getters which are now defined in Bean class. how can i access it. Do i need to create object of EntityBean class using new operator or some other way. I am creating obj using JNDI and type casting into remote interface. but how to access getters from bean class. I am not clear.

Please help me out to resolve these two issues.

Thanks

[wdfink]

1)

you have to use the Manager for this. You can find the JPA entity by PKey or you can use a NamedQuery which can be defined as annotation at the class with the @Entity annotation (but you must not).

Read for example  the JPA tutorial http://docs.oracle.com/javaee/6/tutorial/doc/bnbpz.html.

2)

The getter and setter of an Entity can be used in the same way as a simple class, the persistence is done by the Manager. If you read a JPA tutorial it will be clear.

If you have specific questions regarding JPA you might ask a question in one of the related forums.