TdjHandlerWrapper Class Reference

A HandlerWrapper acts as a IHandler but delegates the handle method and life cycle events to a delegate. More...

Inheritance diagram for TdjHandlerWrapper:

Public Member Functions
	TdjHandlerWrapper ()
	AddHandler (const IHandler Handler)
	Add a handler to the container.
Boolean	IsStarted ()
Boolean	IsStopped ()
	RemoveHandler (const IHandler Handler)
	Removes a handler from this container.
	Start ()
	Starts the component.
	Stop ()
	Stops the component.

Public Attributes
IHandler	Handler
Boolean	Started
Boolean	Stopped

Protected Member Functions
	CheckStarted ()
	Raises an exception if the lifecycle is in "started" state.
	CheckStopped ()
	Raises an exception if the lifecycle is in "stopped" state.
	DoStart ()
	Start the handler.
	DoStop ()
	Start the handler.
TIdHTTPSession	GetSession (TdjServerContext Context, TdjRequest Request, TdjResponse Response, const Boolean Create)
	Get a HTTP session.
	Handle (const string Target, TdjServerContext Context, TdjRequest Request, TdjResponse Response)
	Handles an HTTP request.

Detailed Description

A HandlerWrapper acts as a IHandler but delegates the handle method and life cycle events to a delegate.

This is primarily used to implement the Decorator pattern.

Constructor & Destructor Documentation

TdjHandlerWrapper()

TdjHandlerWrapper::TdjHandlerWrapper

(

)

Referenced by GetSession().

Member Function Documentation

AddHandler()

TdjHandlerWrapper::AddHandler

(

const IHandler

Handler

)

Add a handler to the container.

This implementation of AddHandler calls SetHandler with the passed handler. If this HandlerWrapper had a previous wrapped handler, then it is passed to a call to AddHandler on the passed handler.

Parameters

Handler

the handler to be added

Implements IHandlerContainer.

CheckStarted()

TdjLifeCycle::CheckStarted ( )

protectedinherited

Raises an exception if the lifecycle is in "started" state.

References TdjLifeCycle().

CheckStopped()

TdjLifeCycle::CheckStopped ( )

protectedinherited

Raises an exception if the lifecycle is in "stopped" state.

References TdjLifeCycle(), and Started.

DoStart()

TdjHandlerWrapper::DoStart ( )

protected

Start the handler.

See also

TdjLifeCycle

DoStop()

TdjHandlerWrapper::DoStop ( )

protected

Start the handler.

See also

TdjLifeCycle

GetSession()

TIdHTTPSession TdjHandlerWrapper::GetSession ( TdjServerContext Context, TdjRequest Request, TdjResponse Response, const Boolean Create )

protected

Get a HTTP session.

References TdjHandlerWrapper(), Create(), and Handler.

Referenced by TdjWebComponentContextHandler::AddWebComponent().

Handle()

TdjHandlerWrapper::Handle ( const string Target, TdjServerContext Context, TdjRequest Request, TdjResponse Response )

protected

Handles an HTTP request.

Parameters

Target	Target path or resource identifier
Context	Server context for this request
Request	HTTP request object
Response	HTTP response object to populate

Exceptions

EWebComponentException

if an exception occurs that interferes with the component's normal operation.

Implements IHandler.

IsStarted()

Boolean TdjLifeCycle::IsStarted ( )

inherited

Returns

True if component is started

Implements ILifeCycle.

References Create().

Referenced by DoStart(), and TdjWebComponentHandler::FindHolder().

IsStopped()

Boolean TdjLifeCycle::IsStopped ( )

inherited

Returns

True if component is stopped

Implements ILifeCycle.

Referenced by DoStart().

RemoveHandler()

TdjHandlerWrapper::RemoveHandler

(

const IHandler

Handler

)

Removes a handler from this container.

Parameters

Handler

Handler to remove

Implements IHandlerContainer.

References Handler.

Start()

TdjLifeCycle::Start ( )

inherited

Starts the component.

Implements ILifeCycle.

References Stopped.

Stop()

TdjLifeCycle::Stop ( )

inherited

Stops the component.

Implements ILifeCycle.

References TdjLifeCycle().

Referenced by DoStart(), and TdjWebComponentHandler::InvokeService().

Member Data Documentation

Handler

IHandler TdjHandlerWrapper::Handler

Referenced by GetSession(), and RemoveHandler().

Started

Boolean TdjLifeCycle::Started

inherited

Referenced by TdjHandlerCollection::~TdjHandlerCollection(), CheckStopped(), DoStop(), and TdjWebComponentHandler::InvokeService().

Stopped

Boolean TdjLifeCycle::Stopped

inherited

Referenced by DoStop(), and Start().