On Thu, 8 Nov 2001, Kenneth D. Litwak wrote: > 1. Is there a one to one to one relationship during a method call between an > EJBObject, an EntityContext object and an entity bean instance?
> 2. How often is the setEntityContext method called? Every time a bean comes > out of the free pool into active memory? When the EJBObject is created? According to the EJB lifecycle, the context methods get called exactly once in the life of a bean. This is called after the constructor and just as the bean is being placed into the pool. Therefore you are required to keep a reference to the EntityContext in order to use it later on. > 3. As a follown to #2 then, does the EntityCont3xt object persist between > entity bean method calls? Yes. > 4. If there's a one to one relationship between the EJBObject, the > EntityContext and the bean instance, and since EJBObject has its own > getPrimaryKey() method, whywaste time doing context.getPrimaryKey() How do you acquire an instance of EJBObject? Inside your implementation class, you don't directly have access to your own EJBObject. The only way you can do that is through the context interface. The biggest difference here is that, if say during the ejbLoad() method you grabbed the EJBObject and held a reference to it, then wen't through the passivate/activate cycle the primary key returned by EJBObject may be different to that returned by the entity context. ie You particular instance may now represent a different piece of data. > 5. What is _stored_ in the EntityContext object? We don't know and don't care. EntityContext could be implemented as a bunch of callbacks to the container, or it could contain a bunch of variables. Either way, you should not care about it. -- Justin Couch http://www.vlc.com.au/~justin/ Freelance Java Consultant http://www.yumetech.com/ Author, Java 3D FAQ Maintainer http://www.j3d.org/ ------------------------------------------------------------------- "Look through the lens, and the light breaks down into many lights. Turn it or move it, and a new set of arrangements appears... is it a single light or many lights, lights that one must know how to distinguish, recognise and appreciate? Is it one light with many frames or one frame for many lights?" -Subcomandante Marcos ------------------------------------------------------------------- =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff EJB-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
