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//=============================================================================
/**
* @file FT_Service_Callbacks.h
*
* $Id$
*
* A concrete FT service callback implementation
*
* @author Balachandran Natarajan <bala@cs.wustl.edu>
*/
//=============================================================================
#ifndef TAO_FT_CALLBACKS_H
#define TAO_FT_CALLBACKS_H
#include /**/ "ace/pre.h"
#include "FT_ClientORB_export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "tao/Service_Callbacks.h"
#include "orbsvcs/FT_CORBA_ORBC.h"
class TAO_Profile;
class TAO_MProfile;
class TAO_ORB_Core;
/**
* @class TAO_FT_Service_Callbacks
*
* @brief A class to dynamically load the FT callback implementations in
* to the ORB.
*
* An implementation of the service callbacks that allows the
* loading of the FT ORB level library in to the ORB
*/
class TAO_FT_ClientORB_Export TAO_FT_Service_Callbacks : public TAO_Service_Callbacks
{
public:
/// Constructor
TAO_FT_Service_Callbacks (TAO_ORB_Core *orb_core);
/// Dtor
virtual ~TAO_FT_Service_Callbacks (void);
/// Check whether <obj> is nil or not. FT spec suggests some
/// extensions for a CORBA::is_nil () operation.
virtual CORBA::Boolean object_is_nil (CORBA::Object_ptr obj);
/// Check for equivalency of the two profiles
virtual CORBA::Boolean is_profile_equivalent (const TAO_Profile *,
const TAO_Profile *);
/// Calculate the hash
virtual CORBA::ULong hash_ft (TAO_Profile *p,
CORBA::ULong m);
/// Check whether we need to raise an exception or go for a
/// reinvocaton.
virtual TAO::Invocation_Status raise_comm_failure (
IOP::ServiceContextList &clist,
TAO_Profile *profile
ACE_ENV_ARG_DECL);
/// Check whether we need to raise an exception or go for a
/// reinvocaton.
virtual TAO::Invocation_Status raise_transient_failure (
IOP::ServiceContextList &clist,
TAO_Profile *profile
ACE_ENV_ARG_DECL);
private:
/// Check whether the right flags are available so that we can issue a
/// restart.
CORBA::Boolean restart_policy_check (IOP::ServiceContextList &service_list,
const TAO_Profile *profile);
private:
/// The ORB core in which we have been activated
TAO_ORB_Core *orb_core_;
/// Mutex to protect access to the profile that gets passed along
/// @@ Lock needs to be removed...
ACE_Lock* profile_lock_;
/**
* A flag that indicates that the primary has already failed. So any
* more calls to select_profile () should not reset the profile
* pointer to the primary.
*/
CORBA::Boolean primary_failed_;
/**
* A flag to indicate that a secondary has been selected for
* invocation. We do this only once in the cycle. When we get there
* again we dont select a primary again and again.
*/
CORBA::Boolean secondary_set_;
/// FT group component in the IOGR
FT::TagFTGroupTaggedComponent group_component_;
/// A flag to indicate whether we have extracted the
/// <group_component> before.
CORBA::Boolean group_component_flag_;
};
#if defined (__ACE_INLINE__)
# include "FT_Service_Callbacks.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /*TAO_FT_CALLBACKS_H*/
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