Apple WebObjects 3.5 - Manual (Page 5)

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Table of Contents
Introduction 9
About This Book 11
Other Useful Documentation 12
Part I WebObjects Essentials
What Is a WebObjects Application? 17
The Ingredients of a WebObjects Application 19
Components 20
Template 21
Code or Script File 21
Bindings 22
Application Code 23
Session Code 23
A Note on WebObjects Classes 23
Application Directory 24
Running a WebObjects Application 25
WebObjects Adaptors 26
The WebObjects Application Executable 27
Dynamic Elements 29
Server-Side Dynamic Elements 31
How Server-Side Dynamic Elements Work 33
Binding Values to Dynamic Elements 35
Declarations File Syntax 36
Client-Side Java Components 37
Deciding When to Use Client-Side Components 37
How Client-Side Components Work 38
Common Methods 41
Action Methods 43
Initialization and Deallocation Methods 46
The Structures of init and awake 46
Application Initialization 47
Session Initialization 48
Component Initialization 49
Request-Handling Methods 50
Taking Input Values From a Request 51
Invoking an Action 52
Limitations on Direct Requests 53
Generating a Response 53
Debugging a WebObjects Application 55
Launching an Application for Debugging 57
Debugging WebScript 57
Debugging Java 57
Debugging Objective-C 58
Debugging Mixed Applications 58
Debugging Techniques 58
Writing Debug Messages 58
Using Trace Methods 59
Isolating Portions of a Page 60
Programming Pitfalls to Avoid 60
WebScript Programming Pitfalls 60
Java Programming Pitfalls 61
WebObjects Viewed Through Its Classes 63
The Classes in the Request-Response Loop 65
Server and Application Level 65
Session Level 66
Request Level 68
Page Level 69
Database Integration Level 71