Java EE 8 Design Patterns and Best Practices

Implementing the App1 and App2 classes

In the preceding code block, we have the code of the App1 application. When this application is accessed by a GET request, a request is sent to the authentication service to validate whether the user has already logged in:

import javax.inject.Inject;import javax.ws.rs.*;import javax.ws.rs.core.Response;import java.util.Objects;@Path("app1")public class App1 {    @Inject    private Auth auth;    @GET    public Response helloWorld( String token ){        if( !auth.isLogged( token ) ){            throw new WebApplicationException(Response.Status.UNAUTHORIZED);        }        return Response.ok("Hello World. Welcome to App1!").build();    }    @POST    @Consumes("application/x-www-form-urlencoded")    public Response helloWorld(@FormParam("login") String login ...