Find a list of all resource methods in my application?

Question

Does Jersey provide any way to list all the resources it provides? That is, given the resource class:

package com.zoo.resource @Path("/animals") public class AnimalResource { @GET @Produces(MediaType.APPLICATION_JSON) @Path("dog") public Dog getDog(){ ... } @GET @Produces(MediaType.APPLICATION_JSON) @Path("cat") public Cat getCat(){ ... } } 

Does Jersey provide any way to get information:

• GET on path /animals/dog returns type Dog
• GET on path /animals/cat returns Cat type

(And besides, does it provide me with the opportunity to find out that AnimalResource is a resource?)

I would like this information to be available to me in the unit test, so that I can verify that every resource that I expose matches what the external system expects. I know that there is an automatic version that provides application.wadl , but I don’t see it showing me return types, and I don’t know how to access it from my tests.

Answer 1

[update - the example is the same, but I reformulated my reservations]

It can be done. Try the following:

 import com.sun.jersey.api.model.AbstractResource; import com.sun.jersey.api.model.AbstractSubResourceMethod; import com.sun.jersey.server.impl.modelapi.annotation.IntrospectionModeller; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces; import javax.ws.rs.core.MediaType; public class AnimalsTest { public static void main(String [] args) { AbstractResource resource = IntrospectionModeller.createResource(AnimalResource.class); System.out.println("Path is " + resource.getPath().getValue()); String uriPrefix = resource.getPath().getValue(); for (AbstractSubResourceMethod srm :resource.getSubResourceMethods()) { String uri = uriPrefix + "/" + srm.getPath().getValue(); System.out.println(srm.getHttpMethod() + " at the path " + uri + " return " + srm.getReturnType().getName()); } } } 

 class Dog {} 

 class Cat {} 

 @Path("/animals") class AnimalResource { @GET @Produces(MediaType.APPLICATION_JSON) @Path("dog") public Dog getDog(){ return null; } @GET @Produces(MediaType.APPLICATION_JSON) @Path("cat") public Cat getCat(){ return null; } } 

These introspection classes are in the jersey server.

Please note that in the above example, some Jersey classes are used that have an “impl” in the package name, which suggests that these Jersey classes are not intended for public consumption and can greatly disrupt changes in the future. I'm just thinking here - I'm not a Jersey supporter. Just a random user.

Also, everything is higher than I understood while looking at the source code. I have never seen documentation about the approved way to learn JAX-RS annotated classes. I agree that an officially supported API for this kind of operation will be very useful.