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Common Methods

The methods that you write for your WebObjects application provide the behavior that makes your application unique. Because you are writing subclasses of WOApplication, WOSession, WOComponent, and WODirectAction you inherit the methods provided by those classes. These inherited methods take care of the details of receiving HTTP requests and generating responses. However, you'll sometimes find that you need to override some of the inherited methods to perform certain tasks.

This chapter describes the types of methods that you generally write in a WebObjects application. These types are:

In cases where you override existing methods, those methods are invoked at standard, predictable times during the application's request-response loop (the main loop for a WebObjects application). For background on the request-response loop, see the chapter "WebObjects Viewed Through Its Classes".

As you're writing methods, refer to the class specifications for WOApplication, WOSession, WOComponent, and WODirectAction to learn which messages you can send to these objects. The class specifications are in the online book WebObjects Class Reference.

Action Methods
Component Actions
Direct Actions
Suppressing Session IDs in a Direct Action URL
Setting the Default Request Handler

Initialization and Deallocation Methods
The Structure of init
Application Initialization
Session Initialization
Component Initialization
WODirectAction Initialization

Component-Action Request-Handling Methods
Request Handling Initialization and Post-Processing
Application Awake
Session Awake
Component Awake
Taking Input Values From a Request
Invoking an Action
Limitations on Direct Requests
Generating a Response

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