Hello Frans, I think that statefull/stateless is just an option and it is not the problem here.
I mean that the interesting part of CMP is the declarative programming approach: it gives programmers the ability to declare a map from Object Properties to Db Columns and then automagically obtain Retrieve/Save/Delete methods and Properties getter/setter implemented without coding. Then programmers just code business logic. For sure CMP work well for simple entity object... (80%?) but it's possible to code complex objects (20%?) persistence as with BMP. This was my idea. Don't you agree? And here is a question for a code generator developer as you are: do you know a generic tool that generate code from a code tempate after applying modification declaratively described in XML format? TIA, (luKa) On Tue, 11 Feb 2003 20:33:03 +0100, Frans Bouma <[EMAIL PROTECTED]> wrote: >> I'm looking around to find something similar to >> Container-Managed Persistence (CMP, from the Java world) in >> the .NET world. >> >> I've got this idea because I've just finished to code >> interfaces and services that help to code persistence for >> entity objects just like Bean- Managed Persistence (BMP, from >> the Java world). CMP is one step over, it gives a >> declarative way to develop object persistence. > > Because COM+ and MTS are stateless frameworks, I don't think a >lot of people are willing to go for a stateful persistent framework, >it's too easy to go the stateless route. > >> I think it's a big project to develop CMP-like framework (or code >> generator) by myself , I cannot afford it! >> So I would like to know if there is a *good* open source >> project out there or if Microsoft is going to do something >> similar to CMP. >> I've heard rumors about Microsoft OpenSpaces, but it seams to >> be more similar to JDO than CMP, I've also seen open-source >> projects in SourceForge.net but none of them seams to meet >> wide community acceptance. > > Are you refering to Object Spaces, btw? > > Object Spaces was a nice rumour, however I never saw it working. >The newsgroup is not that active either :(. As a code generator >developer (LLBLGen) I'm very interested in the functionality of Object >Spaces, because it makes code generation for tier-stack applications >easier. However, because most developers who are already developing >n-tier applications on Microsoft platforms are used to work with >stateless environments, I don't think a lot of people will go for a >stateful approach. > >> What are you doing about persistence? > > Nothing really, I only see the benefits for stateful code in 1- >or 2-tier single user clients. > >> Do you know more about OpenSpaces (design, db support, >> release date, licensing)? > > afaik it was a research project that was never developed into a >product. > > FB
