Question

I have used eclipse + glassfish to deploy my first web-service from eclipse.
I have the following class:

package com.restfully.shop.services;

import javax.ws.rs.core.*;
import java.util.*;

public class ShoppingApplication extends Application {

    private Set<Object> singletons = new HashSet<Object>();
    private Set<Class<?>> empty = new HashSet<Class<?>>();

    public ShoppingApplication() {
        singletons.add(new CustomerResource());
    }

    @Override
    public Set<Class<?>> getClasses() {
        return empty;
    }

    @Override
    public Set<Object> getSingletons() {
        return singletons;
    }


}

and the following web.xml:

<?xml version="1.0" ?>
<web-app>
 <servlet>
        <servlet-name>Rest</servlet-name>
        <servlet-class>com.restfully.shop.services.ShoppingApplication</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>Rest</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
</web-app>

As long as I read that jersey is already included with the glassfish – id didnt put anything into the lib folder of the web project.

but hten when I start the app in the browser:

Exception

javax.servlet.ServletException: PWC1403: Class com.restfully.shop.services.ShoppingApplication is not a Servlet
root cause

java.lang.ClassCastException: com.restfully.shop.services.ShoppingApplication cannot be cast to javax.servlet.Servlet

The glassfish version is 3.1.1

I also wrote a simple client which connects to the service throught java.io.URL,
but that one returns:

404
Location:null

What is wrong with the service and how can I fix it?
+ would be very appreciated – how a services tested??? Is it always like that – writing a test class which uses those URL connections or are there any standard ways to test web services?

Answer 1

I have no experience with Glassfish but v3 seems to be JAX-RS aware.

This means a sub-class of javax.ws.rs.core.Application is not needed.

Just deploy your JAX-RS annotated class with a web.xml as follows

<servlet>  
    <servlet-name>ServletAdaptor</servlet-name>  
    <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>  
    <load-on-startup>1</load-on-startup>  
</servlet>  

<servlet-mapping>  
    <servlet-name>ServletAdaptor</servlet-name>  
    <url-pattern>/resources/*</url-pattern>  
</servlet-mapping>

Your REST application can subsequently be accessed by adding /resources/ to the context root.