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.
IHandler	GetHandler ()
Boolean	IsStarted ()
Boolean	IsStopped ()
	RemoveHandler (const IHandler Handler)
	Removes a handler from this container.
	SetHandler (const IHandler Value)
	SetStarted (const Boolean Value)
	SetStopped (const Boolean Value)
	Start ()
	Starts the component.
	Stop ()
	Stops the component.

Public Attributes
TCriticalSection	CS
IHandler	FHandler
Boolean	FStopped
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(), and SetHandler().

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.

CheckStopped()

TdjLifeCycle::CheckStopped ( )

protectedinherited

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

References TdjLifeCycle().

DoStart()

TdjHandlerWrapper::DoStart ( )

protected

Start the handler.

See also

TdjLifeCycle

DoStop()

TdjHandlerWrapper::DoStop ( )

protected

Start the handler.

See also

TdjLifeCycle

GetHandler()

IHandler TdjHandlerWrapper::GetHandler

(

)

References Handler, and SetHandler().

GetSession()

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

protected

Get a HTTP session.

References TdjHandlerWrapper(), FHandler, Handler, and SetHandler().

Referenced by TdjWebComponentContextHandler::Add().

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 TdjLifeCycle().

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

IsStopped()

Boolean TdjLifeCycle::IsStopped ( )

inherited

Returns

True if component is stopped

Implements ILifeCycle.

References Create().

Referenced by DoStart().

RemoveHandler()

TdjHandlerWrapper::RemoveHandler

(

const IHandler

Handler

)

Removes a handler from this container.

Parameters

Handler

Handler to remove

Implements IHandlerContainer.

SetHandler()

TdjHandlerWrapper::SetHandler

(

const IHandler

Value

)

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

Referenced by GetHandler(), and GetSession().

SetStarted()

TdjLifeCycle::SetStarted ( const Boolean Value )

inherited

Referenced by DoStop().

SetStopped()

TdjLifeCycle::SetStopped ( const Boolean Value )

inherited

Referenced by DoStop().

Start()

TdjLifeCycle::Start ( )

inherited

Starts the component.

Implements ILifeCycle.

References TdjLifeCycle().

Referenced by DoStart().

Stop()

TdjLifeCycle::Stop ( )

inherited

Stops the component.

Implements ILifeCycle.

References Stopped.

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

Member Data Documentation

CS

TCriticalSection TdjLifeCycle::CS

inherited

Referenced by ~TdjLifeCycle().

FHandler

IHandler TdjHandlerWrapper::FHandler

Referenced by GetSession().

FStopped

Boolean TdjLifeCycle::FStopped

inherited

Referenced by ~TdjLifeCycle(), and DoStop().

Handler

IHandler TdjHandlerWrapper::Handler

Referenced by GetHandler(), GetSession(), and SetHandler().

Started

Boolean TdjLifeCycle::Started

inherited

Referenced by TdjHandlerCollection::~TdjHandlerCollection(), and DoStop().

Stopped

Boolean TdjLifeCycle::Stopped

inherited

Referenced by DoStop(), and Stop().