On 9.3.2011 11:10, Markus Karg wrote:
> Martin,
>
> but that will give the static uri. Doesn't Martynas expect to get the actual uri (including any trailing IDs)?
I would be surprised, given he wants to do it in the singleton
constructor and he says: "I see no reason why root Resources with static
@Path could not have access to their UriInfo at any time - their URI is
known right from the start?"
Regards,
Martin
> Regards
> Markus
>
> -----Original Message-----
> From: Martin Matula [mailto:martin.matula_at_oracle.com]
> Sent: Mittwoch, 9. März 2011 10:58
> To: users_at_jersey.java.net
> Subject: [Jersey] Re: UriInfo injection at resource initialization time
>
> Hi Martynas,
> UriInfo is specific to the current request (has some properties that
> provide info for the specific request). You can't inject such thing to
> an instance variable of a singleton. Does not make sense.
> I believe UriBuilder.fromResource(TestResource.class).build() is what
> you are looking for.
> Martin
>
> On 9.3.2011 2:39, Martynas Jusevicius wrote:
>> Hey list,
>>
>> I'm new here and would like to start with a question :)
>>
>> I have Resource classes implementing JAX-RS, however I also want to
>> combine it with RDF using Jena API.
>> Each Resource should have a reference to Individual (RDF resource) -
>> and they share the same absolute URI.
>> This is a root Resource class:
>>
>> @Path("")
>> @Singleton
>> public class TestResource
>> {
>> private Individual individual = null;
>>
>> ...
>> }
>>
>> This means Individual has to be initiated at some point, and at that
>> point the Resource needs to know its URI to be able to look up
>> Individual in the RDF model.
>>
>> What I've tried (the code goes inside the TestResource defined above):
>>
>> 1. Injected class field
>>
>> @Context UriInfo uriInfo;
>>
>> public TestResource()
>> {
>> System.out.println("TestResource.uriInfo: " + uriInfo);
>> }
>>
>> Doesn't work - returns null
>>
>> 2. Injected constructor parameter
>>
>> public TestResource(@Context UriInfo uriInfo)
>> {
>> System.out.println("TestResource(uriInfo): " + uriInfo);
>> }
>>
>> Doesn't work - I get
>> java.lang.IllegalStateException
>> com.sun.jersey.server.impl.ThreadLocalHttpContext.getUriInfo
>> as described in
>> http://jersey.576304.n2.nabble.com/injecting-UriInfo-in-constructor-td4510740.html
>> Same message suggests "access the reference when a request is in
>> scope" -- but this is not good enough.
>>
>> However constructor param is used in JAX-RS tutorial:
>> http://wikis.sun.com/display/Jersey/Overview+of+JAX-RS+1.0+Features#OverviewofJAX-RS1.0Features-ConditionalGETsandReturning304%28NotModified%29Responses
>>
>> 3. @PostConstruct method
>>
>> @PostConstruct
>> public void init()
>> {
>> System.out.println("@PostConstruct UriInfo: " + uriInfo);
>> }
>>
>> Doesn't work - never gets executed
>>
>> Am I missing something? It seems as such a common use case - why isn't
>> there a simple solution?
>> I see no reason why root Resources with static @Path could not have
>> access to their UriInfo at any time - their URI is known right from
>> the start?
>> And why does @PostConstruct not work? I'm running Tomcat 6.0.26.
>>
>> Thanks,
>>
>> Martynas
>> semantic-web.dk