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From "Nick Stuart" <nstu...@speranzasystems.com>
Subject Re: Incremental node type update?!?
Date Tue, 08 Jul 2008 19:48:44 GMT
Thats what I am hoping Toby. Any of our changes would be adding a property
or something like that, not changing the previous properties. The one thing
I'm afraid of is if we find a new requirement 6 months down the road and
want to add a new property to stuff we are storing in JackRabbit, none of
our old stuff will work. I just don't see anything throught the NodeManager
API to accomplish this.

In this particular case all I wanted to do was add a new property to an
existing node type. Right now the stuff we are storing are mostly types of
nt:folder and nt:file, so going with nt:unstructured really isn't an option.
I have setup our own custom node types that have a set of mixins on them
extending nt:file/folder, which works just great. I just want to know that
down the road those mixins can be updated to add a new property or

Obviously I know some changes just can't happen (node type removal,
required/default values change etc) as I can see those would just not work
with existing data, but would love it if adding a property or something of
the like was available.


On 7/8/08, Tobias Bocanegra <tobias.bocanegra@day.com> wrote:
> On 7/8/08, Alexander Klimetschek <aklimets@day.com> wrote:
> > Hi Nick,
> >
> >  if you want a flexible data structure, go with nt:unstructured. Only
> >  use node types and mixins for things you know that are fixed and for
> >  which you want to search for easily ( //element(*, my:nodetype) ). In
> >  this case you have to re-create content and re-register node types
> >  from scratch. But a good JCR application creates its initial node
> >  types and content model upon first startup with an empty repository
> >  anyway. For reset, you can simply delete the workspace folder (if it
> >  contains the persistence manager data such as derby files) except for
> >  the workspace.xml, and it will get recreated on the next startup of
> >  Jackrabbit.
> >
> >  On Tue, Jul 8, 2008 at 4:33 PM, Nick Stuart <
> nstuart@speranzasystems.com> wrote:
> >  > Is there a way to update node types without have to delete your entire
> >  > repository and start over? I dont see a lot of methods on the
> >  > NodeTypeManager to allow for really any kind of operation besides
> >  > registering types.
> >  >
> >  > This can't really be an unforseen problem as I imagine data structures
> are
> >  > going to change everywhere, so I think I must be missing something. If
> I try
> >  > to register node types that already exist I of course get an error say
> its
> >  > already there.
> if the nodetype change is compatible with the existing one, i.e.
> adding a new property or childnode definition, relaxing a constraint,
> etc, the node type can be reregistered.
> regards, toby

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