Hi Pedro,
> I've downloaded the code for your project (OpenUSS) to install it here and
The download files is not up-to-date any longer (I'll update OpenUSS
with the 1.1 version next week ;-)). If you want to get the current
code, just download it from the CVS repository.
> try to reproduce your error so i can try to figure out a solution. I'm very
> interested on this problem cause I use Jonas with Interbase and want to know
> if I ca have problems in the future.
Until the last term/semester (100 students and 4 assistants
as daily users), I found 2 problems within JOnAS:
1) Our "old" problem with "read_committed".
2) Memory leak problem (look at my old mail at the list).
I'm saving all the files in the BLOB field and
the files are sometimes very big. Every 3 or 4 days
I have to restart JOnAS because of java.lang.OutOfMemory
error. At that time I used JDK 1.2.2 and JOnAS 2.7.
I upgraded to JDK 1.3.1 but it's a pitty that our semester
ended at that time, so I cannot see, whethet it has
helped me or not.
On the next term/semester (begin on 15th. October) I hope,
I can see, whether this memory leak problem also exists
with JDK 1.3.1 and JOnAS 2.3. This time we'll have about
300 until 500 students.
I think, the idea of using "isModified" extension is really
great, because:
- Most of operations I use are read operations.
(BLOB beans read...). Can you imagine, if JOnAS has to
update the database, everytime it reads the BLOB beans?
- This does not have any impact to my beans'
independency in EJB server vendor's point of view.
This factor is really important for me, because I also
want to test my beans with other EJB servers available.
After all, why we use EJBs, if we are going to stuck
into one vendor? If I install my beans under any other
EJB servers, they just ignore the "isModified" method.
This is a really good mechanism of JOnAS, thanks for
pointing this out, Philippe!
I'm planning to make a general class, that implements
the "isModified" method, so it does not make any
clutter in my beans implementation.
I would like to hear from the list, whether someone
also has some practical experiences in JOnAS (with many
users) ;-)
--
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Blasius Lofi Dewanto
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OpenUSS - Open University Support System
http://openuss.sourceforge.net
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E-Mail : [EMAIL PROTECTED]
ICQ : 39343280
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