JavaEE6+REST: How do I get all REST resources at runtime?

Question

Hello, everyone!

Is there a possibility to get a list of all registered REST resources at runtime?

With REST resources I mean:

• either classes which have annotations such as @Path(...) and are considered by the server at runtime (so traversing all classes using reflection would not do),
• or URIs of all paths (REST class can have multiple paths).

NOTE 1: I am using automatic configuration (that new feature of JavaEE 6) and Netbeans just generates an empty ApplicationConfig class.

NOTE 2: Using Netbeans 6.9, JavaEE 6, Glassfish 3. Is more information on my ecosystem needed?

Answer 1

Are you using Jersey? If so, then a WADL is generated automatically at /application.wadl. The WADL contains a lot of information about registered resource paths.

See also: Jersey and WADL

Answer 2

public synchronized Response doSomething(@Context Application c, @FormParam("someParam") String someParam)
    throws Exception {

    // gives a list of classes which are used by this Jersey instance
    // and have REST-related annotations
    c.getSingletons(); // returns Set<Object>

    return something;
}