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From Stefan Guggisberg <stefan.guggisb...@gmail.com>
Subject Re: NodeTypes for Starters?!
Date Thu, 30 Jun 2005 09:42:33 GMT
On 6/30/05, Digby <lists@digby.net> wrote:
> Oops.
> 
> I'm interested in why you shouldn't modify custom_nodetypes.xml
> yourself. I've just been playing with this to save myself the effort of
> coding all the node types. I'm just at playing stage so haven't got any
> data to lose.

sure, you can do it, but do it on your own risk. you can easily corrupt 
the entire repository by messing with custom_nodetypes.xml. you won't 
get any help if you break things. 

> 
> Digby
> 
> Stefan Guggisberg wrote:
> > On 6/10/05, Stefan Frank <s.frank@vierundsechzig.de> wrote:
> >
> >>Hi,
> >>
> >>I'm new to jackrabbit, played a little with magnolia and now want to get my
> >>hands dirty with jackrabbit. I intend to use jackrabbit as a repository for
> >>digital assets (images, movies in different formats, pdf ...) - it looks
> >>like jcr is a perfect fit for this kind of application. After reading all
> >>the documents I could find (there is not so much on jackrabbit...), I had my
> >>"Hello World!"-experience (node.setProperty("hello", new
> >>StringValue("World!"));) - now I want to go all the way. Is there some more
> >>documentation somewhere, apart from the jcr-Specification? Up to now, I only
> >>found what's on the incubation-website and a brief article on artima.com.
> >>
> >>Being new to jackrabbit, of course I have lots of questions, eg.
> >>
> >>- how to define custom-node-types (some explanations on the
> >>custom_nodetypes.xml would be nice...)
> >
> >
> > you can register node types by calling
> >
> > NodeTypeRegistry.registerNodeType(NodeTypeDef).
> >
> > here's how you get the NodeTypeRegistry object:
> >
> > Workspace wsp = session.getWorkspace();
> > NodeTypeManager ntMgr = wsp.getNodeTypeManager();
> > NodeTypeRegistry ntReg =
> >        ((NodeTypeManagerImpl) ntMgr).getNodeTypeRegistry();
> >
> > node type registration is not covered by the jsr-170 spec
> > but it's nonetheless available in jackrabbit since day 0.
> >
> > btw: custom_nodetypes.xml should never be manipulated directly;
> > otherwise you risk loosing your data.
> >
> >
> >>- what about lazy-loading (what do I get with a node.getNodes(), when each
> >>nodes has child nodes - is that configurable?
> >
> >
> > that's nothing you have to worry about. it's up to the repository to
> > implement this efficiently.
> >
> >
> >>- what about concurrency? I haven't seen any assumptions about transactional
> >>behavior in the jcr - if i got it right, it is up to the repository to
> >>ensure that no nodes are deleted by B to which A adds nodes?!
> >
> >
> > check out the jsr 170 specification. transaction support is described in detail.
> > another feature to avoid the above descibed scenario is locking.
> >
> > cheers
> > stefan
> >
> >
> >>...
> >>
> >>Any hints on even the most unfinished documentation would be highly
> >>appreciated! (I'll try to write down what you throw at me and maybe will try
> >>to compile some how-tos from it...)
> >>
> >>Cheers
> >>Stefan
> >>
> >>
> >
> >
> 
>

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