RE: ejb 2.0 proposed final draft #2 is out

[Tim Drury]

Title: RE: ejb 2.0 proposed final draft #2 is out

I'm still reading but here is what I'm learning:

 

Dependent objects (as they were in PFD1) are gone.  They have been replaced

with something called a local view.  An entity bean may have either a remote

view or a local view, but not both.  A remote view is the typical entity bean we've

all come to know and love.  It's methods are exposed to the client via the remote

interface and calls to it occur over RMI using call-by-value (ignoring optimization

techniques).  A local view entity is one whose local interface exposes methods

that are only accessible within the same JVM.  Therefore no remote clients

may access these beans.  They do not use RMI and use the typical call-by-

reference that you are used to when you make object-to-object method calls.

Local views have the equivalent Home and Object reference, but with local

in them.

 

As for one poster's response (below), they probably didn't want to change

the name of the Remote view classes/interfaces for backward compatibility

reasons.

 

I'm not going to say whether or not this approach is ideal, but I can tell you

that who ever writes these specs does a good job of making them very

readable.

 

-tim

 

-----Original Message-----
From: Alex Paransky [mailto:[EMAIL PROTECTED]]
Sent: Friday, April 27, 2001 3:37 PM
To: Orion-Interest
Subject: RE: ejb 2.0 proposed final draft #2 is out

I read the spec, and still saw the Dependent Objects in there.  Where does it say that the DOs are gone?

 

-AP_

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Russ White
Sent: Friday, April 27, 2001 9:53 AM
To: Orion-Interest
Subject: RE: ejb 2.0 proposed final draft #2 is out

Am I the only one that think the following makes more sense?

 

EJBObject -> Local interface

RemoteEJBObject -> Remote interface

 

as opposed to

 

EJBObject -> Remote interface

EJBLocalObject -> Local interface

 

Isn't is the more natural state for an object to be local?

 

I am glad the whole DO thing is gone. It made no good sense at all.

 

Just my 2C

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Tim Drury
Sent: Friday, April 27, 2001 9:14 AM
To: Orion-Interest
Subject: RE: ejb 2.0 proposed final draft #2 is out

Here is the section that says what is different between
PFD 1 and 2:

E.12 Proposed Final Draft 2
Introduced local interfaces and local home interfaces for entity beans and session beans.
Added characterization of local client view.
Added subclasses of EJBException for systems exceptions thrown from local interface methods.
Revisions to architecture for container managed persistence:
* Shifted container managed relationships among entity beans from remote interfaces to local
interfaces.
* Removed dependent object classes.
* Removed remote relationships among entity beans.