https://aripd.com/tags/contexts-and-dependency-injection/ Recent content in Contexts and Dependency Injection on ARI Systems Hugo en-us ARI Systems Sat, 16 May 2026 06:19:44 +0000 https://aripd.com/blog/cdi/ Sat, 12 Jan 2019 00:00:00 +0000 https://aripd.com/blog/cdi/ <h2 id="references">References <a href="#references" class="permalink"><i class="bi bi-link-45deg"></i></a></h2><ul> <li><a href="https://docs.oracle.com/javaee/7/tutorial/cdi-adv004.htm" target="_blank" rel="noopener noreferrer">Using Predefined Beans in CDI Applications</a></li> <li><a href="https://docs.oracle.com/javaee/7/tutorial/injection001.htm" target="_blank" rel="noopener noreferrer">Resource Injection</a></li> </ul> <h2 id="predefined-beans">Predefined Beans <a href="#predefined-beans" class="permalink"><i class="bi bi-link-45deg"></i></a></h2> <table class="table table-hover"> <thead> <tr> <th>Predefined Bean</th> <th>Resource or CDI Bean</th> <th>Injection Example</th> </tr> </thead> <tbody> <tr> <td>UserTransaction</td> <td>Resource</td> <td>@Resource UserTransaction transaction;</td> </tr> <tr> <td>Principal</td> <td>Resource</td> <td>@Resource Principal principal;</td> </tr> <tr> <td>Validator</td> <td>Resource</td> <td>@Resource Validator validator;</td> </tr> <tr> <td>ValidatorFactory</td> <td>Resource</td> <td>@Resource ValidatorFactory factory;</td> </tr> <tr> <td>HttpServletRequest</td> <td>CDI bean</td> <td>@Inject HttpServletRequest req;</td> </tr> <tr> <td>HttpSession</td> <td>CDI bean</td> <td>@Inject HttpSession session;</td> </tr> <tr> <td>ServletContext</td> <td>CDI bean</td> <td>@Inject ServletContext context;</td> </tr> </tbody> </table> <p>Predefined beans are injected with dependent scope and the predefined default qualifier <code>@Default</code>.</p>