dev@jsr311.java.net

Re: obtaining objects from 3rd party containers

From: Paul Sandoz <Paul.Sandoz_at_Sun.COM>
Date: Mon, 16 Jul 2007 12:19:57 +0200

Hi Dhanji,

Thanks, this does give a better picture.

I better understand now if some generic mechanism were available to
'hook in' life-cycle and injection support of resources this could work
for SE, EE or Spring profile etc.

Paul.

Dhanji R. Prasanna wrote:
> Hi Paul
>
> Here's a simple scenario:
>
> @URITemplate("/person/{id}")
> public class PersonResource {
>
> private PersonDao dao; //injected by spring
>
> @HttpMethod(GET) public Response get(@URIParam("id") String id) { .. }
> }
>
> In the above example, the get() method uses PersonDao to fetch a Person
> record from the database (presumably). If the PersonResource object were
> provided by spring, the dao would be injected based on deployment
> configuration.
>
> Fitting it in with jsr311's runtime is potentially tricky. At first
> blush I would say when PersonResource is registered by the runtime, it
> does the necessary reflection work and upon each request asks for an
> instance from spring (or HiveMind, guice, whatever). The scopes,
> lifecycle and instantiation of both the PersonResource and its
> dependencies (PersonDao) can then be managed by the external container.
>
> For instance, the PersonResource may have some very complex
> domain-specific lifecycle ("holiday mode" while a Person is away on
> holiday for a frivolous example). All this can be left to the user and
> the problem domain (and of course the external IoC container).
>
> This will make for a lightweight and flexible, embeddable jsr311
> framework. Does this give a better picture of what Im talking about?
>
> Dhanji.
>
> On 7/9/07, * Paul Sandoz* <Paul.Sandoz_at_sun.com
> <mailto:Paul.Sandoz_at_sun.com>> wrote:
>
> Hi Dhanji,
>
> I am not that familiar with Spring, could you provide a simple example
> of how Spring could work with a 311 POJO?
>
> Is this similar to you previous email on filters?
>
> Paul.
>
> Dhanji R. Prasanna wrote:
> > Is there some kind of extensible ResourceDispatcher that can be
> > implemented to obtain JaxRs Resources from say, a spring container?
> >
> > I can definitely see this as an important use case (especially for
> > things like transaction management, aop logging, security etc.).
> Is this
> > something that has been slotted against the spi?
> >
> > Dhanji.
>
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>
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| ? + ? = To question
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    Paul Sandoz
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