Apple WebObjects 3.5 Manual de usuario descargar pdf (Pagina 87)

How HTML Pages Are Generated

Figure 26. An Object Graph for a Page With a Subcomponent

page template

calendar

template

calendar

instance

calendar

instance

page

component

= page

component

calendar

component

reference

= static element

= subcomponent

= dynamic element

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WEBOBJECTS 1
DEVELOPER’S GUIDE 1
Contents 3
Table of Contents 5
Part II Special Tasks 6
Managing State 109 6
Part III WebScript 7
The WebScript Language 163 7
Foundation Classes 187 7
Index 211 7
Introduction 9
About This Book 11
Other Useful Documentation 12
WEBOBJECTS ESSENTIALS 15
Chapter 1 17
<DocumentRoot> 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
WebObjects Adaptors 26
WODefaultApp 27
Dynamic Elements 29
Server-Side Dynamic Elements 31
Chapter 2 Dynamic Elements 32
.wod ﬁle: 33
Declarations File Syntax 36
Client-Side Java Components 37
Common Methods 41
Action Methods 43
Chapter 3 Common Methods 44
Application Initialization 47
Session Initialization 48
Component Initialization 49
Request-Handling Methods 50
Invoking an Action 52
Generating a Response 53
Chapter 4 55
Debugging WebScript 57
Debugging Java 57
Debugging Techniques 58
Using Trace Methods 59
Programming Pitfalls to Avoid 60
Java Programming Pitfalls 61
Chapter 5 63
Server and Application Level 65
Session Level 66
Request Level 68
Page Level 69
Database Integration Level 71
Accessing the Session 74
Assigning Input Values 78
Generating the Response 80
How HTML Pages Are Generated 82
START:Calendar { 85
SPECIAL TASKS 89
Creating Reusable Components 91
Simplifying Interfaces 96
Intercomponent Communication 98
Parent's Template File 99
<DocRoot> 105
Designing for Reusability 106
Complete Declaration 107
Partial Declaration 108
Managing State 109
Chapter 7 Managing State 112
Objects and State 113
State Storage Strategies 120
Comparison of Storage Options 121
State in the Server 123
State in the Page 124
State in Cookies 126
Custom State-Storage Options 128
Controlling Session State 133
Setting Session Time-Out 134
Controlling Component State 135
Adjusting the Page Cache Size 136
Using awake and sleep 137
Client-Side Page Caching 139
Chapter 8 141
Choosing a Strategy 143
Objective-C Java 146
Chapter 9 149
Maintaining a Log File 151
Accessing Statistics 152
Recording Extra Information 153
Error Handling 154
Performance Tips 156
Compile the Application 157
Control Memory Leaks 157
Limit State Storage 158
Limit Database Fetches 158
Limit Page Sizes 158
Installing Applications 159
WEBSCRIPT 161
The WebScript Language 163
Objects in WebScript 165
WebScript Language Elements 166
Variables and Scope 167
Assigning Values to Variables 168
Invoking Methods 171
Accessor Methods 171
Sending a Message to a Class 172
Creating Instances of Classes 173
Data Types 174
Statements and Operators 175
Control-Flow Statements 176
Arithmetic Operators 176
Logical Operators 176
Relational Operators 176
Reserved Words 178
“Modern” WebScript Syntax 179
Advanced WebScript 181
Categories 182
Objective-C WebScript 183
Chapter 11 187
Foundation Objects 189
Determining Equality 190
Working With Strings 191
Commonly Used String Methods 192
Comparing Strings 194
Converting String Contents 194
Modifying Strings 195
Storing Strings 195
Working With Arrays 196
Commonly Used Array Methods 196
Creating Arrays 197
Querying Arrays 197
Sorting Arrays 198
Adding and Removing Objects 198
Working With Dictionaries 200
Creating Dictionaries 202
Querying Dictionaries 203
Storing Dictionaries 205
Working With Dates and Times 206
Commonly Used Date Methods 207
Representing Dates as Strings 208
Retrieving Date Elements 208
– minuteOfHour 209
– secondOfMinute 209

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Apple WebObjects 3.5 Manual de usuario Pagina 87

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