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// -*- C++ -*-
//=============================================================================
/**
* @file LB_Random.h
*
* $Id$
*
* @author Ossama Othman <ossama@uci.edu>
*/
//=============================================================================
#ifndef LB_RANDOM_H
#define LB_RANDOM_H
#include /**/ "ace/pre.h"
#include "orbsvcs/orbsvcs/CosLoadBalancingS.h"
# if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
# endif /* ACE_LACKS_PRAGMA_ONCE */
/**
* @class TAO_LB_Random
*
* @brief "Random" load balancing strategy
*
* This load balancing strategy is designed to select an object group
* member residing at a random location.
*/
class TAO_LB_Random
: public virtual POA_CosLoadBalancing::Strategy,
public virtual PortableServer::RefCountServantBase
{
public:
/// Constructor.
/**
* Seeds the OS' random number generator.
*/
TAO_LB_Random (PortableServer::POA_ptr poa);
/**
* @name CosLoadBalancing::Strategy methods
*
* Methods required by the CosLoadBalancing::Strategy interface.
*/
//@{
virtual char * name (ACE_ENV_SINGLE_ARG_DECL_WITH_DEFAULTS)
ACE_THROW_SPEC ((CORBA::SystemException));
virtual CosLoadBalancing::Properties * get_properties (
ACE_ENV_SINGLE_ARG_DECL_WITH_DEFAULTS)
ACE_THROW_SPEC ((CORBA::SystemException));
virtual void push_loads (
const PortableGroup::Location & the_location,
const CosLoadBalancing::LoadList & loads
ACE_ENV_ARG_DECL_WITH_DEFAULTS)
ACE_THROW_SPEC ((CORBA::SystemException,
CosLoadBalancing::StrategyNotAdaptive));
virtual CosLoadBalancing::LoadList * get_loads (
CosLoadBalancing::LoadManager_ptr load_manager,
const PortableGroup::Location & the_location
ACE_ENV_ARG_DECL_WITH_DEFAULTS)
ACE_THROW_SPEC ((CORBA::SystemException,
CosLoadBalancing::LocationNotFound));
virtual CORBA::Object_ptr next_member (
PortableGroup::ObjectGroup_ptr object_group,
CosLoadBalancing::LoadManager_ptr load_manager
ACE_ENV_ARG_DECL_WITH_DEFAULTS)
ACE_THROW_SPEC ((CORBA::SystemException,
PortableGroup::ObjectGroupNotFound,
PortableGroup::MemberNotFound));
virtual void analyze_loads (
PortableGroup::ObjectGroup_ptr object_group,
CosLoadBalancing::LoadManager_ptr load_manager
ACE_ENV_ARG_DECL_WITH_DEFAULTS)
ACE_THROW_SPEC ((CORBA::SystemException));
//@}
/// Returns the default POA for this servant.
virtual PortableServer::POA_ptr _default_POA (
ACE_ENV_SINGLE_ARG_DECL_WITH_DEFAULTS
);
/// TAO-specific underlying implementation of this Random load
/// balancing strategy's next_member() method.
static CORBA::Object_ptr _tao_next_member (
PortableGroup::ObjectGroup_ptr object_group,
CosLoadBalancing::LoadManager_ptr load_manager,
const PortableGroup::Locations & locations
ACE_ENV_ARG_DECL)
ACE_THROW_SPEC ((CORBA::SystemException,
PortableGroup::ObjectGroupNotFound,
PortableGroup::MemberNotFound));
/// Initialize the random load balancing strategy.
/**
* If supported by the platform, initialization code will only run
* once for a given process.
*/
static void init (void);
private:
/// This servant's default POA.
PortableServer::POA_var poa_;
};
#include /**/ "ace/post.h"
#endif /* LB_RANDOM_H */
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