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// $Id$
// ============================================================================
//
// = LIBRARY
// TAO
//
// = FILENAME
// Transport_Mux_Strategy.h
//
// = DESCRIPTION
// IIOP Transport Mux Strategies.
//
// = AUTHOR
// Alexander Babu Arulanthu <alex@cs.wustl.edu>
//
// ============================================================================
#ifndef TAO_TRANSPORT_MUX_STRATEGY_H
#define TAO_TRANSPORT_MUX_STRATEGY_H
#include "tao/GIOP.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
class TAO_Reply_Dispatcher;
class TAO_Export TAO_Transport_Mux_Strategy
{
// = TITLE
//
// Strategy to determine whether the connection should be
// multiplexed for multiple requests or it is exclusive for a
// single request at a time.
//
// = DESCRIPTION
//
public:
TAO_Transport_Mux_Strategy (void);
// Base class constructor.
virtual ~TAO_Transport_Mux_Strategy (void);
// Base class destructor.
virtual CORBA::ULong request_id (void) = 0;
// Generate and return an unique request id for the current
// invocation.
// = Bind and Find methods for the <Request ID, ReplyDispatcher>
// pairs. The ReplyDispatcher is not the CORBA ReplyDispatcher of
// the AMI's.
virtual int bind_dispatcher (CORBA::ULong request_id,
TAO_Reply_Dispatcher *rh) = 0;
// Bind the dispatcher with the request id.
virtual int dispatch_reply (CORBA::ULong request_id,
CORBA::ULong reply_status,
const TAO_GIOP_Version& version,
TAO_GIOP_ServiceContextList& reply_ctx,
TAO_GIOP_Message_State* message_state) = 0;
// Dispatch the reply for <request_id>, cleanup any resources
// allocated for that request.
// = "Factory methods" to obtain the CDR stream, in the Muxed case
// the factory simply allocates a new one, in the Exclusive case
// the factory returns a pointer to the pre-allocated CDR.
virtual TAO_GIOP_Message_State *get_message_state (void) = 0;
// Get a CDR stream.
virtual void destroy_message_state (TAO_GIOP_Message_State *) = 0;
// Destroy a CDR stream.
};
class TAO_Export TAO_Muxed_TMS : public TAO_Transport_Mux_Strategy
{
// = TITLE
//
// Connection is multiplexed for many requests.
//
// = DESCRIPTION
//
public:
TAO_Muxed_TMS (void);
// Constructor.
virtual ~TAO_Muxed_TMS (void);
// Destructor.
// = The TAO Request Strategy methods...
virtual CORBA::ULong request_id (void);
virtual int bind_dispatcher (CORBA::ULong request_id,
TAO_Reply_Dispatcher *rh);
virtual int dispatch_reply (CORBA::ULong request_id,
CORBA::ULong reply_status,
const TAO_GIOP_Version& version,
TAO_GIOP_ServiceContextList& reply_ctx,
TAO_GIOP_Message_State* message_state);
virtual TAO_GIOP_Message_State *get_message_state (void);
virtual void destroy_message_state (TAO_GIOP_Message_State *);
protected:
// @@ HASH TABLE???
};
class TAO_Export TAO_Exclusive_TMS : public TAO_Transport_Mux_Strategy
{
// = TITLE
//
// Connection exclusive for the request.
//
// = DESCRIPTION
//
public:
TAO_Exclusive_TMS (void);
// Constructor.
virtual ~TAO_Exclusive_TMS (void);
// Destructor.
// = The TAO Request Strategy methods...
virtual CORBA::ULong request_id (void);
virtual int bind_dispatcher (CORBA::ULong request_id,
TAO_Reply_Dispatcher *rh);
virtual int dispatch_reply (CORBA::ULong request_id,
CORBA::ULong reply_status,
const TAO_GIOP_Version& version,
TAO_GIOP_ServiceContextList& reply_ctx,
TAO_GIOP_Message_State* message_state);
virtual TAO_GIOP_Message_State *get_message_state (void);
virtual void destroy_message_state (TAO_GIOP_Message_State *);
protected:
CORBA::ULong request_id_generator_;
// Used to generate a different request_id on each call to
// request_id()
CORBA::ULong request_id_;
// Request id for the current request.
TAO_Reply_Dispatcher *rd_;
// Reply Dispatcher corresponding to the request.
};
#endif /* TRANSPORT_MUX_STRATEGY_H */
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