Le 14 avr. 06 à 04:53, Yen-Ju Chen a écrit :
I just wonder how this different from the GSCoreData
(http://savannah.nongnu.org/projects/gscoredata/) ?
To roughly outline differences…
CoreObject is an advanced nameserver (inspired by what you can find a
micro-kernel OS, in fact CoreObject is very similar to Spring OS
nameserver) which provides three key facilities :
- interaction beetwen objects transparently across processes, hosts
and languages (like CORBA)
- unified view of the whole system (OS components, applications,
documents, contacts etc.) in term of a hierarchical objects structure
- integrated security model
CoreObject aims to fix the numerous limitations of Objective-C DO
nameserver and provides (through a single API) a very simple yet
flexible way to deal with any kind of items/objects (relying on
'distributed objets' concepts invisibly under the hood).
GSCoreData is a an object-relational mapping framework to handle
objects persistency in a way independent of the store (XML, DBs
etc.), it takes away the burden of tracking/managing object graphs by
yourself.
That means both CoreObject and GSCoreData are really different
beasts. You probably noticed CoreObject provides classes like
COPersistentObject and COPersistentUserObject, that doesn't mean
CoreObject has persistency support. They are proxy classes
(representing a distant persistent object) you would use to interact
with the real objects. You can publish an object as a 'persistent
object' or 'persistent user object' to allow special persistent
related operations on it from other processes. But the persistency is
still delegated to the process who published the object (that means
on the behalf of the process itself or CoreData or OS etc.)
Publishing an object just means making it available outside of its
process by registering it in the CoreObject nameserver.
More on Spring OS : <http://en.wikipedia.org/wiki/
Spring_operating_system>
Quentin.
--
Quentin Mathé
[EMAIL PROTECTED]
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