Tech: Java EE 6

Web Tie

JavaServer Faces technology provides a well-defined programming model and various tag libraries. These features significantly ease the burden of building and maintaining web applications with server-side user interfaces (UIs). With minimal effort, you can complete the following tasks.
Create a web page.
Drop components onto a web page by adding component tags.
Bind components on a page to server-side data.
Wire component-generated events to server-side application code.
Save and restore application state beyond the life of server requests.
Reuse and extend components through customization.

One of the greatest advantages of JavaServer Faces technology is that it offers a clean separation between behavior and presentation for web applications. A JavaServer Faces application can map HTTP requests to component-specific event handling and manage components as stateful objects on the server.

Facelets technology, available as part of JavaServer Faces 2.0, is now the preferred presentation technology for building JavaServer Faces technology-based web applications
Createing a simple JSF app
In the Java EE 6 platform, JavaServer Faces provides built-in support for Ajax.
- By using the f:ajax tag along with another standard component in a Facelets application. This method adds Ajax functionality to any UI component without additional coding and configuration.
- By using the JavaScript API method jsf.ajax.request(), directly within the Facelets application. This method provides direct access to Ajax methods, and allows customized control of component behavior.

The most fundamental services provided by CDI are as follows:

Contexts: The ability to bind the lifecycle and interactions of stateful components to well-defined but extensible lifecycle contexts
Dependency injection: The ability to inject components into an application in a typesafe way, including the ability to choose at deployment time which implementation of a particular interface to inject