18 May
2009
18 May
'09
2:32 p.m.
On May 17, 2009, at 12:04 PM, Vincent Massol wrote:
Currently this is the way for adding a "rest resource" to the system:
drop a jar with your code and declare the resources in the web.xml so
that they can be found and registered. The question about "being
dynamic" is indeed central and should be addressed wrt the whole Rest
subsystem.
I am spending some time on it and currently I am exploring the
following solution: declare every resource as a @Component and use
the component manager for discovering resources (via the lookupList
method). This will solve the problem of modifying the web.xml and
adding a set of resources will be just a matter of dropping a jar in
WEB-INF/lib.
The difficult part here is making the Restlet/JAXRS and Component
Manager logics to co-exist. So far things seem to work but I am having
some initialization problems and, moreover, with this approach
components cannot be singletons so I will need to handle with care
component deallocation. I hope to have a working thing by the end of
the day.
Should I find some blocking problem another approach could be the one
used by Jersey (the other JAXRS implementation)
Basically this approach would consist in looking for every class in
every jar that is annotated with a JAXRS annotation. Or alternatively
"duplicate" the component manager lookup code in order to load classes
declared in a "resources.txt" file.
Of course I think that the @Component way is better (you have
automatic injection) and I would proceed on this path in order to make
it work.
If you have any comment don't hesitate.
Cheers,
Fabio
To install it,
web.xml must be modified:
<!-- RESTful API Restlet servlet -->
<servlet>
<servlet-name>RestletServlet</servlet-name>
<servlet-class>
org.xwiki.rest.XWikiRestletServlet
</servlet-class>
<init-param>
<param-name>resources</param-name>
<param-value>
...
com.xpn.xwiki.rest.annotation.AnnotationService;
</param-value>
</init-param>
...
It's too complex for the users and not dynamic enough IMO. I suggest
you work with Fabio to provide a generic REST servlet that can be
extended internally using components when we need to add new REST
APIs.
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