adam bien's blog

To deploy multiple JAX-RS applications with different URIs in one WAR you will have to create one javax.ws.rs.core.Application subclass per such an application (or use web.xml for this purpose). Obviously the in Java EE ubiquitous Convention over Configuration (or Configuration by Exception) cannot work any more: you will have to explicitly configure resources in each subclass by overriding the method getClasses or getSingletons:

@Path("first")
public class FirstResource {
    @GET
    public String first() {
        return "first";
    }
}

@ApplicationPath("one")
public class JAXRSConfigurationOne extends Application {
    @Override
    public Set<Class<?>> getClasses() {
        Set<Class<?>> resources = new HashSet<>();
        resources.add(FirstResource.class);
        return resources;
    }
}

@Path("second")
public class SecondResource {
    @GET
    public String first() {
        return "second";
    }
}

@ApplicationPath("two")
public class JAXRSConfigurationTwo extends Application {
    @Override
    public Set<Class<?>> getClasses() {
        Set<Class<?>> resources = new HashSet<>();
        resources.add(SecondResource.class);
        return resources;
    }
}

Both JAX-RS applications become accessible through distinct URIs: http://localhost:8080/multiple-roots/one/first and http://localhost:8080/multiple-roots/two/second

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