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USING SCOPE OBJECTS other Web resources. The Java Servlet technology mechanisms that allow a Web component to invoke other Web resources are described in Invoking Other Web Resources (page 72). Using Scope Objects Collaborating Web components share information via objects maintained as attributes of four scope objects. These attributes are accessed with the [get|set]Attribute methods of the class representing the scope. Table 3–3 lists the scope objects. Table 3–3 Scope Objects Scope Object Class Accessible From Web context javax.servlet. ServletContext Web components within a Web context. See Accessing the Web Context (page 75). session javax.servlet. http.HttpSession Web components handling a request that belongs to the session. See Maintaining Client State (page 76). subtype of request page javax.servlet. ServletRequest Web components handling the request. javax.servlet. jsp.PageContext The JSP page that creates the object. See Implicit Objects (page 92). 55
