Why simple Jax-rs 2.0 example is not working in websphere 9.0 ?

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
 version="3.0">
 <servlet>
    <servlet-name>RestServlet</servlet-name>
    <servlet-class>javax.ws.rs.core.Application</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>RestServlet</servlet-name>
    <url-pattern>/users/*</url-pattern>
</servlet-mapping>
</web-app>

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package com.ibm.jaxrs.sample;

import java.util.HashSet;
import java.util.Set;

import javax.json.JsonWriter;
import javax.ws.rs.ApplicationPath;

@ApplicationPath("/users")
public class HelloWorldAppConfig extends javax.ws.rs.core.Application {
	   
	   public Set<Class<?>> getClasses() {
	      HashSet<Class<?>> set = new HashSet<Class<?>>();
	      set.add(HelloWorldResource.class);
	      System.out.println("Completed application getclasses");
	      return set;
	   }

}

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package com.ibm.jaxrs.sample;

import javax.ws.rs.core.*;
import javax.ws.rs.*;
import javax.servlet.http.HttpServletRequest;

import javax.ws.rs.core.Application;

@javax.ws.rs.Path("/show")
public class HelloWorldResource {

	private static final String LINK_SELF = "self";
	public HelloWorldResource() {
		// TODO Auto-generated constructor stub
    	System.out.println("Got inside constructor");
	}
	
	@GET
	@POST
    @Produces(MediaType.TEXT_PLAIN)
	@Path("/show")
    public Response getAll(@Context UriInfo uriInfo) {
		System.out.println("Completed application getsingleton");
        return Response.ok("Hello").build();
    }//@Produces( MediaType.APPLICATION_JSON )
	
 }

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com.ibm.jaxrs2.0.thinclient_9.0.jar
com.ibm.jaxws.thinclient_9.0.jar
com.ibm.ws.ejb.portable_9.0.jar
com.ibm.ws.ejb.thinclient_9.0.jar
com.ibm.ws.jaxrs20.tools.jar
cxf-rt-frontend-jaxrs-3.1.12.jar
cxf-rt-rs-client-3.1.12.jar
cxf-rt-rs-extension-providers-3.1.12.jar
cxf-rt-rs-extension-search-3.1.12.jar
cxf-rt-rs-json-basic-3.1.12.jar
javax.ws.rs-api-2.0.jar

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