Question

I would like to be able to access the following rest URLs:

• http://localhost:9998/helloworld
• http://localhost:9998/helloworld/$count

The first URL works fine. I am having trouble with the $count URL using Jersey implementation of JAX-RS.

Here is the code for the resource.

@Path("/helloworld")
public class HelloWorldResource {
    @GET
    @Produces("text/plain")
    public String getClichedMessage() {
        return "Hello World!";
    }

    @GET
    @Path("\\$count")
    @Produces("text/plain")
    public String getClichedMessage(
            @PathParam("\\$count") String count) {

        return "Hello count";
    }
}

I’ve also tried “$count” in both @Path and @PathParam but that didn’t work either.

Note: If I remove the dollar sign from all the code above then it works fine for the URL localhost:9998/helloworld/count. However I need the dollar sign to be there in the URL because this will be an OData producer application.

Answer 1

Found the answer. Placing the dollar sign in a character class did the trick.

@GET
@Path("{count : [$]count(/)?}")
@Produces("text/plain")
public String getClichedMessageCount(
        @PathParam("count") String count) {

    return "Hello count";
}

The above matches the following URLs.

• localhost:9998/helloworld/$count
• localhost:9998/helloworld/$count/
• localhost:9998/helloworld/$count?$filter=blah
• localhost:9998/helloworld/$count/?$filter=blah