Ajax Request Lifecycle - The Java EE 6 Tutorial (original) (raw)
2. Using the Tutorial Examples
3. Getting Started with Web Applications
4. JavaServer Faces Technology
7. Using JavaServer Faces Technology in Web Pages
8. Using Converters, Listeners, and Validators
9. Developing with JavaServer Faces Technology
10. JavaServer Faces Technology: Advanced Concepts
11. Using Ajax with JavaServer Faces Technology
Using Ajax Functionality with JavaServer Faces Technology
Monitoring Events on the Client
Loading JavaScript as a Resource
Using JavaScript API in a Facelets Application
Using the @ResourceDependency Annotation in a Bean Class
The ajaxguessnumber Example Application
The ajaxguessnumber Source Files
The ajaxgreeting.xhtml Facelets Page
The UserNumberBean Managed Bean
Running the ajaxguessnumber Example
To Build, Package, and Deploy the ajaxguessnumber Example Using NetBeans IDE
To Build, Package, and Deploy the ajaxguessnumber Example Using Ant
To Run the ajaxguessnumber Example
Further Information about Ajax in JavaServer Faces Technology
12. Composite Components: Advanced Topics and Example
13. Creating Custom UI Components and Other Custom Objects
14. Configuring JavaServer Faces Applications
16. Uploading Files with Java Servlet Technology
17. Internationalizing and Localizing Web Applications
18. Introduction to Web Services
19. Building Web Services with JAX-WS
20. Building RESTful Web Services with JAX-RS
21. JAX-RS: Advanced Topics and Example
23. Getting Started with Enterprise Beans
24. Running the Enterprise Bean Examples
25. A Message-Driven Bean Example
26. Using the Embedded Enterprise Bean Container
27. Using Asynchronous Method Invocation in Session Beans
Part V Contexts and Dependency Injection for the Java EE Platform
28. Introduction to Contexts and Dependency Injection for the Java EE Platform
29. Running the Basic Contexts and Dependency Injection Examples
30. Contexts and Dependency Injection for the Java EE Platform: Advanced Topics
31. Running the Advanced Contexts and Dependency Injection Examples
32. Introduction to the Java Persistence API
33. Running the Persistence Examples
34. The Java Persistence Query Language
35. Using the Criteria API to Create Queries
36. Creating and Using String-Based Criteria Queries
37. Controlling Concurrent Access to Entity Data with Locking
38. Using a Second-Level Cache with Java Persistence API Applications
39. Introduction to Security in the Java EE Platform
40. Getting Started Securing Web Applications
41. Getting Started Securing Enterprise Applications
42. Java EE Security: Advanced Topics
Part VIII Java EE Supporting Technologies
43. Introduction to Java EE Supporting Technologies
45. Resources and Resource Adapters
46. The Resource Adapter Example
47. Java Message Service Concepts
48. Java Message Service Examples
49. Bean Validation: Advanced Topics
50. Using Java EE Interceptors
51. Duke's Bookstore Case Study Example
52. Duke's Tutoring Case Study Example
53. Duke's Forest Case Study Example
An Ajax request varies from other typical JavaServer Faces requests, and its processing is also handled differently by the JavaServer Faces lifecycle.
As described in Partial Processing and Partial Rendering, when an Ajax request is received, the state associated with that request is captured by the javax.faces.context.PartialViewContext. This object provides access to information such as which components are targeted for processing/rendering. The processPartial method ofPartialViewContext uses this information to perform partial component tree processing and rendering.
The execute attribute of the f:ajax tag identifies which segments of the server side component tree should be processed. Because components can be uniquely identified in the JavaServer Faces component tree, it is easy to identify and process a single component, a few components, or a whole tree. This is made possible by the visitTree method of the javax.faces.component.UIComponent class. The identified components then run through the JavaServer Faces request lifecycle phases.
Similar to the execute attribute, the render attribute identifies which segments of the JavaServer Faces component tree need to be rendered during the render response phase.
During the render response phase, the render attribute is examined. The identified components are found and asked to render themselves and their children. The components are then packaged up and sent back to the client as a response.
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