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// -*- C++ -*-
//=============================================================================
/**
* @file LB_CPU_Load_Average_Monitor.h
*
* $Id$
*
* @author Ossama Othman <ossama@uci.edu>
*/
//=============================================================================
#ifndef TAO_LB_CPU_LOAD_AVERAGE_MONITOR_H
#define TAO_LB_CPU_LOAD_AVERAGE_MONITOR_H
#include /**/ "ace/pre.h"
#include "orbsvcs/orbsvcs/LoadBalancing/LoadBalancing_export.h"
# if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
# endif /* ACE_LACKS_PRAGMA_ONCE */
#include "orbsvcs/orbsvcs/CosLoadBalancingS.h"
/**
* @class TAO_LB_CPU_Load_Average_Monitor
*
* @brief LoadMonitor implementation that monitors the overall CPU
* load on a given host.
*
* Loads returned from this load monitor are the average number of
* processes in the "run" queue over a ***FIXME*** seconds averaged
* over the number of processors. For example, a load of 2 on a dual
* CPU host is returned as an average load of 1 by this CPU load
* monitor, a load of 5 on a quad CPU host will be reported as a load
* of 1.25 (i.e. 5/4), and so on and so forth.
*/
class TAO_LoadBalancing_Export TAO_LB_CPU_Load_Average_Monitor
: public virtual POA_CosLoadBalancing::LoadMonitor,
public virtual PortableServer::RefCountServantBase
{
public:
/// Constructor
/**
* If no location is supplied the hostname or IP address is used by
* default.
*/
TAO_LB_CPU_Load_Average_Monitor (const char * location_id = 0,
const char * location_kind = 0);
/**
* @name CosLoadBalancing::LoadMonitor Methods
*
* Methods required by the CosLoadBalancing::LoadMonitor interface.
*/
//@{
/// Return the location at which the LoadMonitor resides.
/**
* The returned "Location" is a sequence of length 1.
*/
virtual CosLoadBalancing::Location * the_location (
ACE_ENV_SINGLE_ARG_DECL_WITH_DEFAULTS)
ACE_THROW_SPEC ((CORBA::SystemException));
/// Return the average CPU load at the location which this
/// LoadMonitor resides.
/**
* @return A "Load" sequence of length 1 that contains a LoadId
* equal to CosLoadBalancing::CPU, and the average CPU
* load.
*/
virtual CosLoadBalancing::LoadList * loads (
ACE_ENV_SINGLE_ARG_DECL_WITH_DEFAULTS)
ACE_THROW_SPEC ((CORBA::SystemException));
//@}
protected:
/// Destructor
/**
* Protected destructor to enforce proper memory management through
* reference counting.
*/
~TAO_LB_CPU_Load_Average_Monitor (void);
private:
/// The name of the location at which this LoadMonitor resides.
CosLoadBalancing::Location location_;
};
#include /**/ "ace/post.h"
#endif /* TAO_LB_CPU_LOAD_AVERAGE_MONITOR_H */
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