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// This may look like C, but it's really -*- C++ -*-
// $Id$
// ============================================================================
//
// = LIBRARY
// TAO
//
// = FILENAME
// Reply_Dispatcher.h
//
// = DESCRIPTION
// Dispatch the reply appropriately.
//
// = AUTHOR
// Alexander Babu Arulanthu <alex@cs.wustl.edu>
//
// ============================================================================
#ifndef TAO_REPLY_DISPATCHER_H
#define TAO_REPLY_DISPATCHER_H
#include "tao/GIOP.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "tao/MessagingC.h"
// Forward Declarations.
class TAO_Stub;
class TAO_InputCDR;
class TAO_Export TAO_Reply_Dispatcher
{
// = TITLE
//
// = DESCRIPTION
//
public:
TAO_Reply_Dispatcher (void);
// Constructor.
virtual ~TAO_Reply_Dispatcher (void);
// Destructor.
virtual int dispatch_reply (CORBA::ULong reply_status,
const TAO_GIOP_Version& version,
IOP::ServiceContextList& reply_ctx,
TAO_GIOP_Message_State* message_state) = 0;
// Dispatch the reply. Return 1 on sucess, -1 on error.
virtual TAO_GIOP_Message_State *message_state (void);
// Get the Message State into which the reply has been read.
const IOP::ServiceContextList& reply_service_info () const;
// Accessing the reply service context list.
virtual int leader_follower_condition_variable (TAO_Transport *);
// Obtain the condition variable used in the Leader Follower Wait
// Strategy. This is valid only for the synchronous reply dispatcher
// and only when the Leader Follower wait strategy is used.
protected:
IOP::ServiceContextList reply_service_info_;
// The service context list
};
// *********************************************************************
class TAO_Export TAO_Synch_Reply_Dispatcher : public TAO_Reply_Dispatcher
{
// = TITLE
//
// Reply dispatcher for Synchoronous Method Invocation (SMI)s.
//
// = DESCRIPTION
//
public:
TAO_Synch_Reply_Dispatcher (TAO_ORB_Core *orb_core);
// Constructor.
virtual ~TAO_Synch_Reply_Dispatcher (void);
// Destructor.
CORBA::ULong reply_status (void) const;
// Get the reply status.
const TAO_GIOP_Version& version (void) const;
// Get the GIOP version.
virtual int dispatch_reply (CORBA::ULong reply_status,
const TAO_GIOP_Version& version,
IOP::ServiceContextList& reply_ctx,
TAO_GIOP_Message_State* message_state);
// Dispatch the reply. Copy the buffers and return. Since the
// invocation is synchronous demarshalling will take place on the
// stack.
// Return 1 on sucess, -1 on error.
virtual TAO_GIOP_Message_State *message_state (void);
// Return the message state of this invocation.
virtual TAO_InputCDR &reply_cdr (void);
// Return the reply CDR.
virtual int &reply_received (void);
// Return the reference to the reply received flag. This will not
// make sense in the Asynch Reply Dispatcher case, since the
// reply will be dispatched as soon as it is available and the
// dispatcher will go away immediately after that.
virtual int leader_follower_condition_variable (TAO_Transport *);
// Obtain the condition variable used in the Leader Follower Wait
// Strategy.
private:
CORBA::ULong reply_status_;
// Reply or LocateReply status.
TAO_GIOP_Version version_;
// The version
TAO_GIOP_Message_State message_state_;
// All the state required to receive the input...
int reply_received_;
// Flag that indicates the reply has been received.
ACE_SYNCH_CONDITION *leader_follower_condition_variable_;
// Condition variable used by the leader to notify the follower
// about the availability of the response.
TAO_ORB_Core *orb_core_;
// Cache the ORB Core pointer.
};
// *********************************************************************
#if defined (TAO_HAS_CORBA_MESSAGING) && defined (TAO_POLLER)
class TAO_Export TAO_Asynch_Reply_Dispatcher : public TAO_Reply_Dispatcher
{
// = TITLE
//
// Reply dispatcher for Asynchoronous Method Invocation (AMI)s.
//
// = DESCRIPTION
//
public:
TAO_Asynch_Reply_Dispatcher (const TAO_Reply_Handler_Skeleton &reply_handler_skel,
Messaging::ReplyHandler_ptr reply_handler_ptr);
// Constructor.
virtual ~TAO_Asynch_Reply_Dispatcher (void);
// Destructor.
CORBA::ULong reply_status (void) const;
// Get the reply status.
const TAO_GIOP_Version& version (void) const;
// Get the GIOP version
virtual int dispatch_reply (CORBA::ULong reply_status,
const TAO_GIOP_Version& version,
IOP::ServiceContextList& reply_ctx,
TAO_GIOP_Message_State* message_state);
// Dispatch the reply. This involves demarshalling the reply and
// calling the appropriate call back hook method on the reply
// handler.
// Return 1 on sucess, -1 on error.
virtual TAO_GIOP_Message_State *message_state (void);
// Return the message state.
private:
CORBA::ULong reply_status_;
// Reply or LocateReply status.
TAO_GIOP_Version version_;
// The version
TAO_GIOP_Message_State *message_state_;
// CDR stream for reading the input.
// @@ Carlos : message_state should go away. All we need is the reply
// cdr. Is that rite? (Alex).
const TAO_Reply_Handler_Skeleton reply_handler_skel_;
// Skeleton for the call back method in the Reply Handler.
Messaging::ReplyHandler_ptr reply_handler_;
// Reply Handler passed in the Asynchronous Invocation.
};
#endif /* TAO_HAS_CORBA_MESSAGING && TAO_POLLER */
// *********************************************************************
#if defined (__ACE_INLINE__)
#include "tao/Reply_Dispatcher.i"
#endif /* __ACE_INLINE__ */
#endif /* TAO_REPLY_DISPATCHER_H */
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