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// -*- C++ -*-
// $Id$
// ============================================================================
//
// = LIBRARY
// TAO/orbsvcs/Time_Service
//
// = FILENAME
// TAO_Time_Service_Clerk.h
//
// = DESCRIPTION
// This class implements the CosTime::TimeService IDL interface.
//
// = AUTHOR
// Vishal Kachroo <vishal@cs.wustl.edu>
//
// ============================================================================
#ifndef TAO_TIME_SERVICE_CLERK_H
#define TAO_TIME_SERVICE_CLERK_H
#include "ace/Reactor.h"
#include "orbsvcs/Naming/Naming_Utils.h"
#include "orbsvcs/TimeServiceS.h"
#include "Timer_Helper.h"
class TAO_ORBSVCS_Export TAO_Time_Service_Clerk : public POA_CosTime::TimeService
{
// = TITLE
// TimeService Object Implementation.
//
// = DESCRIPTION
// The Object implementation implements methods to retrieve
// GLOBAL time as well as secure GLOBAL time. The times are
// retrieved as UTOs. The object also allows creation of a TIO
// for a given time interval. In general, the TimeService clerk
// manages the UTOs and the TIOs. The notion of time returned
// here is the globally synchronized time.
public:
friend class Timer_Helper;
// Helper class to help in the updation of time.
typedef ACE_Array_Base<CosTime::TimeService_var> IORS;
// Unbounded set of IORs.
// = Initialization and termination methods.
TAO_Time_Service_Clerk (int timer_value,
const IORS& server);
// Constructor.
~TAO_Time_Service_Clerk (void);
// Destructor.
virtual CosTime::UTO_ptr universal_time (CORBA::Environment &env);
// This operation returns the global time and an estimate of
// inaccuracy in a UTO.
virtual CosTime::UTO_ptr secure_universal_time (CORBA::Environment &env);
// This operation returns the global time in a UTO only if the time
// can be guaranteed to have been obtained securely. Currently this
// operation is not implemented and throws a CORBA::NO_IMPLEMENT
// exception, if called.
virtual CosTime::UTO_ptr new_universal_time (TimeBase::TimeT time,
TimeBase::InaccuracyT inaccuracy,
TimeBase::TdfT tdf,
CORBA::Environment &env);
// This creates a new UTO based on the given parameters.
virtual CosTime::UTO_ptr uto_from_utc (const TimeBase::UtcT &utc,
CORBA::Environment &env);
// This creates a new UTO given a time in the UtcT form.
virtual CosTime::TIO_ptr new_interval (TimeBase::TimeT lower,
TimeBase::TimeT upper,
CORBA::Environment &env);
// This creates a new TIO with the given parameters.
virtual CORBA::ULongLong get_time (void);
// Return the globally synchronized time.
void name_server (TAO_Naming_Server &server);
// This method is called by the driver program to set the Naming
// Server instance.
CORBA::ULongLong time_;
// Clerk's notion of time.
private:
IORS server_;
// Set of server Time Server IORs.
CORBA::ULongLong update_timestamp_;
// Time when last global synchronization was done.
Timer_Helper helper_;
// This is a friend class that inherits from the Event Handler
// class. The handle_timeout method of this class is scheduled for
// periodic invocation by the reactor. This method, in turn, updates
// the clerks notion of time. Using this class obviates the need for
// the clerk to multiple inherit from the servant base as well as
// the event handler.
};
#endif /* TIME_SERVICE_CLERK_H */
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