The Servlet Package

HydraExpress Servlet Reference Guide
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2.2 The Servlet Package

Figure 1 through Figure 4 show the class hierarchies of the Servlet package. Classes rwsf::HandleBase and rwsf::Exception are part of the Core Library.

Figure 1: Servlet and filter classes

Figure 2: Listeners and events

Figure 4: Exception classes

Table 1 lists and briefly describes the classes and globals in HydraExpress.

NOTE -- Any hyphens that appear in the following table are for formatting purposes only. Rogue Wave class and interface names do not include hyphens.

Table 1: Classes in the Servlet Package

*rwsf::Config*	Base class for classes that encapsulate configuration information.
*rwsf::Cookie*	Represents an HTTP cookie.
*rwsf::Enumeration<T>*	Holds a sequence of values of type `T`.
*rwsf::EventListener*	Base class for event listeners.
*rwsf::Filter*	Base class for filters.
*rwsf::FilterChain*	Encapsulates a sequence of filters.
*rwsf::FilterConfig*	Represents configuration information for a filter.
*rwsf::GenericServlet*	Base class for a protocol-independent servlet.
*rwsf::HttpServlet*	Base class for a servlet that processes HTTP requests.
*rwsf::HttpServletRequest*	Encapsulates a request to an HTTP servlet.
*rwsf::HttpServletResponse*	Encapsulates a response from an HTTP servlet.
*rwsf::HttpSession*	Encapsulates a client session.
*rwsf::HttpSessionBindingEvent*	Encapsulates information about changes to sessions.
*rwsf::HttpSessionEvent*	Encapsulates information about session creation and destruction.
*rwsf::HttpSessionListener*	Listener that monitors session events.
*rwsf::RequestDispatcher*	Dispatches a request to another servlet in the container or a remote HTTP resource.
*rwsf::Servlet*	Base class for servlets.
*rwsf::ServletConfig*	Represents configuration information for a servlet.
*rwsf::ServletContext*	Represents the context within which a servlet or filter is deployed.
*rwsf::ServletContextAttributeEvent*	Encapsulates information about changes to context attributes.
*rwsf::ServletContextAttributeListener*	Listener that monitors changes to context attributes.
*rwsf::ServletContextEvent*	Encapsulates information about context creation and destruction.
*rwsf::ServletContextListener*	Listener that monitors context creation and destruction.
*rwsf::ServletException*	Base class for exceptions thrown by HydraExpress.
*rwsf::ServletOutputStream*	Output object for a servlet response.
*rwsf::ServletRequest*	Encapsulates a client request.
*rwsf::ServletResponse*	Encapsulates a response to a client.
*rwsf::ServletUnavailableException*	Indicates that a servlet or listener is unavailable to service requests.

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2.2 The Servlet Package

Figure 1: Servlet and filter classes

Figure 2: Listeners and events

Figure 3: Handle/body classes

Figure 4: Exception classes

Table 1: Classes in the Servlet Package