Context And Dependency Injection (JSR 299) And Servlets

I've had questions about how to inject Web Beans into servlets and whether that is supported.  In this entry I'll outline a method of accomplishing just that. This is a simple login application that communicates to a servlet using Ajax calls from a JSP view.  I'm not going to focus on the view or the protocol (Ajax) that  is used to communicate with the servlet.  If you are interested in that, you can check out the source (instructions at the end of this post).  I'm going to focus on the servlet code and the supporting classes for the application.  The application just prompts for a user name / pasword, and pressing the submit button sends those values to a servlet.  First, let's take a look at some of the supporting code for the application: Listing 1: Login Credentials package webbeansservlet;   import javax.enterprise.context.RequestScoped; import javax.enterprise.inject.Default; import javax.inject.Named;   /**  * This is just a simple container class Web Bean for the username  *  and password entry values.  */ @Named @RequestScoped @Default public class Credentials { ...

Date: September, 09 2009
Url: http://www.java.net/blog/rogerk/archive/2009/09/09/context-and-dependency-injection-jsr-299-and-servlets

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