Ozone based framework

Kovács Gábor <[email protected]> Mon, 12 Nov 2007 16:02:20 +0100
Newsgroups gmane.comp.java.ozone.user
Message-ID <[email protected]>
Hi All,

I've been using/testing ozone for 4 years now in various test and proof 
of concept projects.
I've tested a few other object oriented databases as well. I'd like to 
share some thoughts with you.

 I think that ozone is unique, because AFAIK no other object oriented 
database server handles the object links as proxy objects. If you are 
developing a server side application this is a huge plus, since usually 
the hardest part of object retrieval is building and caching a complex 
object tree, and the main performance hit usually comes from that. 
Ozone, on the other hand, does the object retrieval in a natural and 
elegant way, reaching only for objects really needed. This method is 
perfect on the server side, and it works (but much slower) on the client 
side as well, if RMI communication is allowed between the server and the 
client.

We encounter problems with this model  when we need to send a complex 
object graph to a fat, GUI like client, process the data and store some 
objects back to the server.
Another problem is that when developing a real world application, 
sometimes allowing RMI communication between the server and the client 
is not an option.

I've done more than just thinking about this :). To solve these 
problems, I've developed a framework, where ozone objects can be 
detached from the server - a selected graph serialized  and sent to the 
client where the data is processed and offline modifications 
subsequently re-attached to the server.  The depth of the graph to be 
detached is specified in the call to the framework. The details of 
translating objects/graphs in both directions of this process is 
automatically handled by this solution. The framework also implements 
database indexing using native ozone objects (retrieving all object 
instances of a certain class is also working).  This framework should be 
viewed as a layer on top of Ozone developed specifically to meet the 
real-life problems I mentioned above. The framwork uses native _Ozone 
and serializable _POJO classes. I've also written ant tasks for easy 
generation of the counterpart objects. If a process works on the server 
side, it can use the native _Ozone classes, a remote client can deal 
with serializable _POJO classes.

I have a couple questions regarding Ozone and this framework:  First of 
all, is ozone currently actively being developed?  How can I get CVS 
access (either read-only or with commit rights)??  And finally, does 
this framework interest anyone? Would anyone be interested in testing 
and improving/contributing to this framework project?

I hope there are some folks who actively developing/using Ozone.

Regards,
Gejzir



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