Java Reference
In-Depth Information
Contexts and
Dependency Injection
Contexts and Dependency Injection
(
CDI
) can be used to simplify integrating the
different layers of a Java EE application. For example, CDI allows us to use a session
bean as a managed bean, so that we can take advantage of the EJB features, such as
transactions, directly in our managed beans.
In this chapter, we will cover the following topics:
• Introduction to CDI
• Qualifiers
• Stereotypes
• Interceptor binding types
• Custom scopes
Introduction to CDI
JavaServer Faces (JSF) web applications employing CDI are very similar to JSF
applications without CDI; the main difference is that instead of using JSF managed
beans for our model and controllers, we use CDI named beans. What makes CDI
applications easier to develop and maintain are the excellent dependency injection
capabilities of the CDI API.
