Path: news.daimi.aau.dk!olm
From: olm@daimi.aau.dk (Ole Lehrmann Madsen)
Newsgroups: comp.lang.beta
Subject: Re: Regarding BETA and OODB Integration
Date: 26 Feb 1998 23:14:43 GMT
Organization: DAIMI, Computer Science Dept. at Aarhus University
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In <66kb1g$1ev$1@vixen.cso.uiuc.edu> "Yahya H. Mirza" <mirza@chip.cs.uiuc.edu> writes:

>Hi,

>I am looking for some detailed information as to how the BETA compiler /
>Development Environment is integrated with an OODB.

>Any information would be appreciated

I don't think that you have got any answer on this article!

The Mjølner System includes a peersistent store for BETA
where you may save and restore all BETA objects (almost).
You are probably aware of this.

In an Esprit research project we have developed together with
Aarhus University an OODB based on this persistent store.
This OODB supports a client-server architecture, concurrency
conctrol, transactions and notifications. Unfortunately,
it turned out to be a lage, slow, monolithic system.

A new project, carried out by Johanna Wiederhold, Aarhus
University, has developed an alternative to the OODB
in the form of a number of frameworks for supporting
a client-server setting, concurency control, transactions 
and notifications. The frameworks can then be used
to configure an OODB. We hope to be able to include
these frameworks in a coming version of the Mjølner
System. We are currently using it in a large development
project.

I am not sure about exactly which version of the Mjølner
System that is needed for the OODB frameworks, but
perhaps a preliminary version can be made available.

Please, note, that the peristent store and OODB is not
suitable for applications with large amounts of objects.

---olm

PS. There are no interfaces to other commercial OODBs.

>Thanks in advance

>Yahya Mirza
>Visiting Member
>Patterns Frameworks Group
>University Of Illnois