Hi Digby,
You have to clearly seperate two things :
1) the storage format of Jackrabbit
2) using JSR 170 to access any type of content
In the first case, I think there is already a lot of choice, ranging
from object serialization into files, to CQFS filesystem-within-a-file,
to XML storage, to JDBC storage and ORM mapping. Some of these are more
mature than others, and some are a little experimental. The nice thing
is that the storage doesn't really matter, because of 2)
The second part is the most important, especially for existing data
system. Granted it will require writing a layer to the existing data
content, but you can bet that there will be some specialized companies
that will offer connectors to all types of backends (btw I'm guessing
this is what Day's is selling, but I could be wrong). If you're
implementing level 1, you can do so quite straightforwardly and migrate
data into Jackrabbit for example :)
Regards,
Serge Huber.
Digby wrote:
Okay - I've just read the wiki about ORM and it's clearly not as
straightforward as I was hoping. I've only just started looking at the
Jackrabbit project, so I'm not up to speed with all the issues, but
coming from an rdbms background, I would have thought most users would
want to be able to plug Jackrabbit into an existing schema, at least
for type 1 repositories. Also for type 2 repositories, as someone else
mentioned in another msg, proprietary flat files might scare a lot of
clients because they can't see where their data is from a traditional
perspective.
I rather like the idea of having the database set up in a similar way
to how the JSR-170 pec suggests (with one table per property type) for
type 2 repositories. It's more "normal" for systems people and is also
available to systems outside JSR-170 (non-Java - MS ADO for example).
Just my 2 pennies worth!
/Digby
Digby wrote:
Hi,
I've managed to download and compile the source for both teh main
Jackrabbit project and (with a few tweaks) the ORM-persistence
contrib project, but I'm not sure how to get my application working
with the orm stuff. The readme.txt file suggests changing a couple of
files depending on which db you want to use, but not how to change
Jackrabbit from using the filesystem to using orm.
Has anyone got any pointers?
Otherwise I'm really excited about Jackrabbit and JSR-170.
Congratulations to all involved.
TIA
/Digby
