Apple WebObjects 3.5 - Manual (Page 6)

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How WebObjects Works—A Class Perspective 72
Starting the Request-Response Loop 72
Taking Values From the Request 73
Accessing the Session 74
Creating or Restoring the Request Page 76
Assigning Input Values 78
Invoking an Action 79
Generating the Response 80
How HTML Pages Are Generated 82
Component Templates 82
Associations and the Current Component 84
Associations and Client-Side Java Components 85
Subcomponents and Component References 86
Part II Special Tasks
Creating Reusable Components 91
Benefits of Reusable Components 93
Centralizing Application Resources 93
Simplifying Interfaces 96
Intercomponent Communication 98
Synchronizing Attributes in Parent and Child Components 102
Sharing Reusable Components Across Applications 104
Search Path for Reusable Components 105
Designing for Reusability 106
Managing State 109
Why Do You Need to Store State? 111
When Do You Need to Store State? 112
Objects and State 113
The Application Object and Application State 113
The Session Object and Session State 115
Component Objects and Component State 118
State Storage Strategies 120
Comparison of Storage Options 121
A Closer Look at Storage Strategies 122
State in the Server 123
State in the Page 124
State in Cookies 126
Custom State-Storage Options 128
Storing State for Custom Objects 131
Archiving Custom Objects in a Database Application 131
Archiving Custom Objects in Other Applications 132
Controlling Session State 133
Setting Session Time-Out 134
Using awake and sleep 135
Controlling Component State 135
Managing Component Resources 135
Adjusting the Page Cache Size 136
Using awake and sleep 137
pageWithName: and Page Caching 138
Client-Side Page Caching 139
Page Refresh and WODisplayGroup 140
Creating Client-Side Components 141
Choosing a Strategy 143
When You Have an Applet’s Source Code 144
When You Don’t Have an Applet’s Source Code 146
Deployment and Performance Issues 149
Recording Application Statistics 151
Maintaining a Log File 151
Accessing Statistics 152
Recording Extra Information 153
Error Handling 154
Automatically Terminating an Application 155
Performance Tips 156
Cache Component Definitions 156
Compile the Application 157
Control Memory Leaks 157
Limit State Storage 158
Limit Database Fetches 158
Limit Page Sizes 158
Installing Applications 159