Document Information


Part I Introduction

1.  Overview

2.  Using the Tutorial Examples

Part II The Web Tier

3.  Getting Started with Web Applications

4.  JavaServer Faces Technology

5.  Introduction to Facelets

6.  Expression Language

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

Using Ajax with Facelets

Using the f:ajax Tag

Sending an Ajax Request

Using the event Attribute

Using the execute Attribute

Using the immediate Attribute

Using the listener Attribute

Monitoring Events on the Client

Handling Errors

Receiving an Ajax Response

Ajax Request Lifecycle

Grouping of Components

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 ui.js JavaScript File

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

15.  Java Servlet Technology

16.  Uploading Files with Java Servlet Technology

17.  Internationalizing and Localizing Web Applications

Part III Web Services

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

Part IV Enterprise Beans

22.  Enterprise Beans

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

Part VI Persistence

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

Part VII Security

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

44.  Transactions

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

Part IX Case Studies

51.  Duke's Bookstore Case Study Example

52.  Duke's Tutoring Case Study Example

53.  Duke's Forest Case Study Example



Overview of Ajax

Ajax refers to JavaScript and XML, technologies that are widely used for creating dynamic and asynchronous web content. While Ajax is not limited to JavaScript and XML technologies, more often than not they are used together by web applications. The focus of this tutorial is on using JavaScript based Ajax functionality in JavaServer Faces web applications.

JavaScript is a dynamic scripting language for web applications. It allows users to add enhanced functionality to user interfaces and allows web pages to interact with clients asynchronously. JavaScript runs mainly on the client side (as in a browser) and thereby reduces server access by clients.

When a JavaScript function sends an asynchronous request from the client to the server, the server sends back a response that is used to update the page’s Document Object Model (DOM). This response is often in the format of an XML document. The term Ajax refers to this interaction between the client and server.

The server response need not be in XML only; it can also be in other formats, such as JSON. This tutorial does not focus on the response formats.

Ajax enables asynchronous and partial updating of web applications. Such functionality allows for highly responsive web pages that are rendered in near real time. Ajax-based web applications can access server and process information and can also retrieve data without interfering with the display and rendering of the current web page on a client (such as a browser).

Some of the advantages of using Ajax are as follows:

  • Form data validation in real time, eliminating the need to submit the form for verification

  • Enhanced functionality for web pages, such as user name and password prompts

  • Partial update of the web content, avoiding complete page reloads