Java Training : Ajax in Java Applications Version 5.0

This course guides Java developers through the sometimes bewildering array of approaches to adding Ajax functionality into their web applications. We analyze the challenges of supporting Ajax from the server side, going beyond simple Ajax request-handling strategies to consider goals such as:

Adhering to the model/view/controller pattern

Minimizing duplication of business and presentation logic

Providing Ajax code transparent access to the application's domain model

Reuse mechanisms such as JSP tag files and JSF facelets are also considered.

We then look at two of the dominant forms of Ajax framework: the RMI approach, and JSF component libraries. For each class of tool we investigate two popular options -- DWR and jabsorb; RichFaces and Trinidad -- and use that comparison to discover the broader architectural patterns of that approach.

Students will complete the course ready to make intelligent choices of Ajax tooling for their applications, and to start working with their chosen framework.

Java Training Learning Objectives

Identify architectural and design challenges inherent in the use of Ajax for Java applications.
Define a request-handling path that best addresses the needs of a given Java web application.
Manage script content and bind scripts to graphical widgets using JSP.
Use JSP tag files to consolidate presentation chunks such that they can be shared between pages and Ajax responses.
Process and generate various Ajax wire formats, including text, HTML fragments, XML, and JSON, both client-side and server-side.
Understand the impact of Ajax processing on session management and security.
Use RMI frameworks including DWR and jabsorb to provide direct connectivity to Java domain and/or service classes.
Use JSF componentn libraries including RichFaces and Trinidad to model Ajax functionality as part of the usual JSF UI model and processing lifecycle.

Java Training Prerequisites

Understanding of the Ajax programming model is required. This course is intended to follow Developing Ajax Applications, or some equivalent training.
Significant Java programming experience is required.
Basic servlets and JSP programming experience is required.
JSF experience will be helpful for the final unit, but is not required.

Java Training Course duration

2 days

Java Training Course outline

Chapter 1. Ajax Strategies

The Simplest Solution
Issues with Ajax Processing
Model/View/Controller for Ajax
Rendering Ajax Responses
RMI Frameworks
Ajax/JSF Frameworks

Chapter 2. Ajax Custom Tags

JSP Custom Tags
Tag Files
Encapsulating UI Fragments
Encapsulating Scripts
Delivering Scripts Once
Generating Unique Scripts
Binding Scripts to Widgets
Rendering Ajax Responses with JSP

Chapter 3. Handling Requests

Ajax-Only Servlets
Multi-Purpose Servlets
Front Controllers
Parsing Ajax Wire Formats
Producing Ajax Wire Formats
Session Management and Security
Finding Domain Objects
Impacts of Ajax on Page Processing

Chapter 4. RMI Frameworks

Java Objects in JavaScript
RMI for Ajax
Direct Web Remoting
jabsorb
Serialization Issues
Serialization vs. Remote Invocation
Creating Objects on the Client Side
Ajax RMI vs. Web Services
Security Issues

Chapter 5. Introduction to JavaServer Faces

MVC and Ajax
JavaServer Faces
UI Components
The JSF Lifecycle
What JSF Does for Ajax

Chapter 6. Facelets

Issues with JSP and JSF
JSP Custom Tags and JSF
Facelets

Chapter 7. JSF Component Libraries

Ajax Component Libraries
RichFaces
The Ajax4jsf Model
Trinidad
Partial Page Rendering
Customizing Client-Side Logic
Ajax-Aware Widgets
Polling and Pushing
JSF and User Events

Chapter 8. The State of the Art

Comparison of Ajax Strategies
Metrics: Code Efficiency
Metrics: Runtime Efficiency
Intangibles: Completeness and Correctness
Intangibles: Ease of Development
Whither Hence?

Appendix A. Learning Resources

System Requirements

Hardware – minimal: 500 MHz, 256 meg RAM, 500 meg disk space

Hardware – recommended: 1.5 GHz, 512 meg RAM, 1 gig disk space

Operating system: Tested on Windows XP Professional. Course software should be viable on all systems which support a Java 6 Developer's Kit.

Network and Security: Limited privileges required

Software: All free downloadable tools.

Contact Information
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