Question

I have a desktop application from where a client can add a new user, can chat with other user etc… I have 2 options now:

1. To make a handler servlet which will get post request on
   according to request the handler servlet will call required
   servlet(e.g loginServlet, chatServlet , addUserServlet etc)
2. Directly call the required servlet from client e.g make direct
   request to chatServlet for chat, login and addUser

Remember my client side is a desktop application. Which method is good for implementing and future enhancements.
Thank you

Answer 1

Well,I think you should go with the 1 st Approach by using Front Controller pattern.

It should consist of only a SINGLE SERVLET which provides a centralized entry point for all requests.This servlet will delegate all request to the required servlet.

You need to do only following thing to apply the front controller pattern in your application:

       <servlet>
       <servlet-name>////servlet name: FrontController</servlet-name>
       <servlet-class>////Fully qualified servlet name e.g: org.chat.controller.FrontController</servlet-class>
       </servlet>
      <servlet-mapping>
      <servlet-name>FrontController<servlet-name>
      <url-pattern>/*</url-pattern>
<servlet-mapping>