Jersey : The ResourceConfig instance does not contain any root resource classes

3 Comments

1. March 21, 2012 at 6:30 am

   Ahmed :

   i have the same probleme , i hava my ejb appl and my web app , in the EJB project i have the session wich i translate them on a REST using JERSEY ,
   here i am “The ResourceConfig instance does not contain any root resource classes.”

   did you find a solution ?

   Reply
2. March 1, 2012 at 4:16 pm

   Rajesh V :

   sorry, i think in my above post I have not provide the java and web.xml code properly.

   here is the my EJB3.0 session bean which I have converted to Rest Service:

   package com.dfs.ejb.rest.demo;
    
   import javax.ejb.Stateless;
   import javax.ws.rs.*;
    
   /**
    * Session Bean implementation class NameService
    */
   @Path("name")
   @Stateless
   public class NameService implements NameServiceRemote {
    
       /**
        * Default constructor. 
        */
       public NameService() {
           // TODO Auto-generated constructor stub
       }
    
       @GET
       @Produces("text/html")
       public String getHtml() {
   		 return "<h2>Hello Rajesh</h2>";
   	}
    
    
       @PUT
       @Consumes("text/plain")
    
   	public void put(String content) {
   		System.out.println("Inside put :"+content);
    
   	}
    
   }

   here is my web.xml:

   <?xml version="1.0" encoding="UTF-8"?>
   <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
   xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 
   xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
     <display-name>ReSTWeb</display-name>
     <servlet>
   		<servlet-name>Jersey REST Service</servlet-name>
   		<servlet-class>
   			com.sun.jersey.spi.container.servlet.ServletContainer
   		</servlet-class>
   		<init-param>
   			<param-name>
   				com.sun.jersey.config.property.packages
   			</param-name>
   			<param-value>com.dfs.ejb.rest.demo</param-value>
   		</init-param>
   		<load-on-startup>1</load-on-startup>
   	</servlet>
   	<servlet-mapping>
   		<servlet-name>Jersey REST Service</servlet-name>
   		<url-pattern>/rest/*</url-pattern>
   	</servlet-mapping>
   </web-app>

   Reply
3. March 1, 2012 at 4:13 pm

   Rajesh V :

   Hi MK,

   Thanks for your Post.

   I am also facing the same problem when I convert the EJB3.0 session bean into ReST service.

   my session bean:

   package com.dfs.ejb.rest.demo;

   import javax.ejb.Stateless;
   import javax.ws.rs.*;

   /**
   * Session Bean implementation class NameService
   */
   @Path(“name”)
   @Stateless
   public class NameService implements NameServiceRemote {

   /**
   * Default constructor.
   */
   public NameService() {
   // TODO Auto-generated constructor stub
   }

   @GET
   @Produces(“text/html”)
   public String getHtml() {
   return “Hello Rajesh”;
   }

   @PUT
   @Consumes(“text/plain”)

   public void put(String content) {
   System.out.println(“Inside put :”+content);

   }

   }

   my web.xml:

   Jersey REST Service

   com.sun.jersey.spi.container.servlet.ServletContainer

   com.sun.jersey.config.property.packages

   com.dfs.ejb.rest.demo

   1

   Jersey REST Service
   /rest/*

   if I add the ejb project as a jar inside lib of my web project its working fine, but If I add the ejb project as J2ee module dependency to web project its working…

   Could you please let me know the process of Converting EJB3 session bean into ReST service.

   Thanks in Advance!
   Rajesh V

   Reply