Deployment and Integration - RESTful Java with JAX-RS 2.0 - page 217

JAX-RS EJB from your Application.getClasses() method. For example, let's say we
have this EJB bean class:

@Stateless
@Path ( "/customers" )
public public class class CustomerResourceBean CustomerResourceBean implements implements CustomerResource {

...
}

If you are manually registering your resources via your Application class, you must re-
gister the bean class of the EJB via the Application.getClasses() method. For example:

package package com . restfully . shop . services ;

import import javax.ws.rs.core.Application javax.ws.rs.core.Application ;

import import javax.ws.rs.ApplicationPath javax.ws.rs.ApplicationPath ;

@ApplicationPath ( "/root" )
public public class class ShoppingApplication ShoppingApplication extends extends Application {

public public Set < Class <?>> getClasses () {

HashSet < Class <?>> set = new

new HashSet < Class <?>>();
set . add ( CustomerResourceBean . class );
return

return set ;

}

}

Spring Integration
Spring is an open source framework similar to EJB. Like EJB, it provides a great abstraction
for transactions, persistence, and security. Further explanation of Spring is beyond the scope
of this topic. If you want more information on it, check out Spring: A Developer's Notebook
by Bruce A. Tate and Justin Gehtland (O'Reilly). Most JAX-RS implementations have their
own proprietary support for Spring and allow you to write Spring beans that are JAX-RS
web services. If portability is not an issue for you, I suggest that you use the integration with
Spring provided by your JAX-RS implementation.
There is a simple, portable way to integrate with Spring that we can talk about in this chapter.
What you can do is write an Application class that loads your Spring XML files and then
registers your Spring beans with JAX-RS through the getSingletons() method. First, let's
define a Spring bean that represents a customer database. It will pretty much look like the
CustomerResource bean described in EJB Integration :