rwsf::ServletContext Class Reference

Represents the context constructed by the Agent for each web application. More...

#include <rwsf/servlet/ServletContext.h>

Inheritance diagram for rwsf::ServletContext:

Public Member Functions
	ServletContext ()
	ServletContext (const ServletContext &second)
virtual	~ServletContext ()
rwsf::Attribute	getAttribute (const std::string &name) const
rwsf::Enumeration< std::string >	getAttributeNames () const
ServletContext	getContext (const std::string &contextName) const
std::string	getContextPath () const
std::string	getInitParameter (const std::string &name) const
rwsf::Enumeration< std::string >	getInitParameterNames () const
int	getMajorVersion () const
std::string	getMimeType (const std::string &ext) const
int	getMinorVersion () const
rwsf::RequestDispatcher	getNamedDispatcher (const std::string &name) const
std::string	getRealPath (const std::string &path) const
rwsf::RequestDispatcher	getRequestDispatcher (const std::string &path) const
std::string	getResourceData (const std::string &path) const
rwsf::Enumeration< std::string >	getResourcePaths (const std::string &path) const
std::string	getServerInfo () const
std::string	getServletContextName () const
void	log (const std::string &message) const
void	log (const std::string &message, const rwsf::Exception &e) const
ServletContext &	operator= (const ServletContext &rhs)
rwsf::Attribute	removeAttribute (const std::string &name)
void	setAttribute (const std::string &name, const rwsf::Attribute &data)
void	setSessionTimeout (size_t timeout)
Public Member Functions inherited from rwsf::HandleBase
bool	isValid (void) const
bool	operator!= (const HandleBase &second) const
bool	operator== (const HandleBase &second) const

Additional Inherited Members
Protected Member Functions inherited from rwsf::HandleBase
	HandleBase (void)
	HandleBase (StaticCtor)
	HandleBase (BodyBase *body)
	HandleBase (const HandleBase &second)
virtual	~HandleBase (void)
BodyBase &	body (void) const
HandleBase &	operator= (const HandleBase &second)

Detailed Description

rwsf::ServletContext represents the web application context. The Agent constructs a single context object for each web application. A C++ web application consists of any number of servlets, filters, listeners,and static Web pages. For more information on web applications, see Section 2.2.2, "Contexts," in the HydraExpress Servlet Development Guide.

Each context object contains application-wide initialization parameters, information about the deployment environment, and a collection of attributes. A context also provides factory methods for creating request dispatchers to redirect requests. A context can retrieve other context objects held by the server so objects in different applications can cooperate.

The behavior of the following functions is inconsistent with or not defined in the Java Servlet Specification v2.3.

getRequestDispatcher()	Accepts an HTTP URL. This is an extension to the specification.
getResource()	Not included in this implementation. Use getResourceData() instead.
getResourceData()	Added as a safer alternative for C++ than the getResourceAsStream() method.
getResourceAsStream()	Not included in this implementation. Use getResourceData() instead.

Constructor & Destructor Documentation

rwsf::ServletContext::ServletContext

(

)

Creates an empty servlet context. Use the copy constructor or assignment operator to create a valid servlet context.

rwsf::ServletContext::ServletContext

(

const ServletContext &

second

)

Creates a new ServletContext handle to the body instance of second.

virtual rwsf::ServletContext::~ServletContext ( )

virtual

Detaches from the current body (if any), decrements its reference count, and deletes it if there are no other references.

Member Function Documentation

rwsf::Attribute rwsf::ServletContext::getAttribute

(

const std::string &

name

)

const

Returns the specified attribute. Attribute name comparisons are case sensitive. If the named attribute is not found, returns an empty attribute.

rwsf::Enumeration<std::string> rwsf::ServletContext::getAttributeNames

(

)

const

Returns an enumeration of all attribute names in this context. If there are no attributes, returns an empty enumeration.

ServletContext rwsf::ServletContext::getContext

(

const std::string &

contextName

)

const

Returns the servlet context associated with the given URI.

std::string rwsf::ServletContext::getContextPath

(

)

const

Returns the local path to the context directory.

std::string rwsf::ServletContext::getInitParameter

(

const std::string &

name

)

const

Returns the named servlet context init parameter. Servlet context init parameters are defined in the deployment descriptor. If the named parameter cannot be found, returns the empty string.

rwsf::Enumeration<std::string> rwsf::ServletContext::getInitParameterNames

(

)

const

Returns an enumeration of all context-level initialization parameter names. If there are no initialization parameters, the enumeration is empty.

int rwsf::ServletContext::getMajorVersion

(

)

const

Returns 2, the major version of the servlet API that the Agent supports.

std::string rwsf::ServletContext::getMimeType

(

const std::string &

ext

)

const

Returns the appropriate MIME type for the named file. MIME types are configured in the global configuration file and also in the individual context configuration files.

int rwsf::ServletContext::getMinorVersion

(

)

const

Returns 3, the minor version of the servlet API that the Agent supports.

rwsf::RequestDispatcher rwsf::ServletContext::getNamedDispatcher

(

const std::string &

name

)

const

Returns a request dispatcher object for the named servlet. If the named servlet does not exist, returns an invalid rwsf::RequestDispatcher object.

std::string rwsf::ServletContext::getRealPath

(

const std::string &

path

)

const

Returns the full operating system-specific path to the resource specified in path.

rwsf::RequestDispatcher rwsf::ServletContext::getRequestDispatcher

(

const std::string &

path

)

const

Returns a request dispatcher object for the path specified. The path can indicate either a local path to a servlet within the same context, a local path to a static page within the same context, or a complete HTTP URL.

std::string rwsf::ServletContext::getResourceData

(

const std::string &

path

)

const

Returns the named resource as a string, where the resource is the contents of the file located at path, and path is a relative path to the context path.

See also

getContextPath().

rwsf::Enumeration<std::string> rwsf::ServletContext::getResourcePaths

(

const std::string &

path

)

const

Returns a set of all paths in the web application.

std::string rwsf::ServletContext::getServerInfo

(

)

const

Returns the server identification string.

std::string rwsf::ServletContext::getServletContextName

(

)

const

Returns the name of this servlet context as defined by the directory in which the context has been deployed.

void rwsf::ServletContext::log

(

const std::string &

message

)

const

Writes message to a servlet log file.

void rwsf::ServletContext::log	(	const std::string &	message,
		const rwsf::Exception &	e
	)		const

Writes message and the string returned by e.why() to a servlet log file.

ServletContext& rwsf::ServletContext::operator=

(

const ServletContext &

rhs

)

Detaches from the current body (if any), decrements its reference count, deletes it if there are no other references, and then attaches to body of rhs, and increments its reference count.

rwsf::Attribute rwsf::ServletContext::removeAttribute

(

const std::string &

name

)

Removes the named attribute name from the servlet context. Returns the previous value. If the named attribute cannot be found, returns an empty attribute. Attribute names are case-sensitive. If there are any rwsf::ServletContextAttributeListener objects defined in the context web.xml file, the Agent notifies those listeners of this change.

void rwsf::ServletContext::setAttribute	(	const std::string &	name,
		const rwsf::Attribute &	data
	)

Sets the named attribute to the given value. If there are any rwsf::ServletContextAttributeListener objects defined in the context web.xml file, the Agent notifies those listeners of the change.

void rwsf::ServletContext::setSessionTimeout

(

size_t

timeout

)

Sets the session timeout to timeout minutes. The Agent invalidates any sessions that have been inactive for longer than the session timeout value. A negative value indicates that sessions should never time out.