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From Thomas Mahler <thm...@web.de>
Subject Re: Shall we drop c/s mode?
Date Sat, 15 Mar 2003 09:03:39 GMT
Hi all,

I just removed the old C/S mode stuff.
I did not remove the PersistenceBrokerBean, i.e. a SessionBean wrapper
around a singlevm PB.

I hope dropping the C/S mode will help us to keep OJB focussed and keep
the PB simpler.

have a nice weekend,

Matthew Baird wrote:
 > +1 to drop it and work on getting better support for OJB to work 
within application servers running in clusters.
 > 	-----Original Message-----
 > 	From: Thomas Mahler [mailto:thma@apache.org]
 > 	Sent: Sat 1/25/2003 10:38 AM
 > 	To: OJB Developers List
 > 	Cc:
 > 	Subject: Shall we drop c/s mode?
 > 	Hi all,
 > 	I'd like to have a decision how to proceed with the client server mode.
 > 	It has not been properly maintained since the 0.9.7 release and a lot of
 > 	junit tests fail.
 > 	It won't be impossible to fix it, but still a lot of work.
 > 	But before we start to repair it I'd like to discuss if there is a
 > 	really a "business need" for c/s mode.
 > 	The original idea was to show that OJB is scalable in itself. But I
 > 	doubt if this is really a requirement.
 > 	If there is a scalibity issue in an application it will be in most cases
 > 	in the web- or EJB-tier. If an Application is clustered accross multiple
 > 	J2EE containers it's quite easy to use OJB in singlevm mode and let it
 > 	share the clustering.
 > 	If the DB is the bottleneck you can use DB clustering. So I don't see a
 > 	real demand for OJB clustering in this context.
 > 	The only possible usecase I see for C/S is:
 > 	If a client app should not use a JDBC driver but still be able to access
 > 	a DB. In this case OJB c/s mode could be a solution.
 > 	But is this a scenario we have to cover?
 > 	The C/S mode also has some disadvantages:
 > 	- It is really slow (at least 10 times slower than singlevm mode!)
 > 	- it produces extra maintenance costs
 > 	- it is a burden to integrate it into the junit testruns (takes 20
 > 	Minutes or so...)
 > 	- Users are often confused about C/S mode. Some users think that it
 > 	could be a replacement for an app server...
 > 	Am I missing something fundamental? Do we still need c/s for some 
 > 	Of course we should also ask the users before we drop this feature.
 > 	What do you say?
 > 	cheers,
 > 	Thomas
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