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// -*- C++ -*-
//=============================================================================
/**
* @file Replication_Strategy.h
*
* $Id$
*
* @author Huang-Ming Huang <hh1@cse.wustl.edu>
*/
//=============================================================================
#ifndef REPLICATION_STRATEGY_H
#define REPLICATION_STRATEGY_H
#include "orbsvcs/FtRtecEventChannelAdminC.h"
#include "tao/PortableInterceptorC.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
namespace FTEC {
struct ManagerInfo;
}
class TAO_FTEC_Event_Channel_Impl;
class Replication_Strategy
{
public:
Replication_Strategy();
virtual ~Replication_Strategy();
/**
* Check if the incoming set_update() request is out of sequence. This is only
* used for basic replication strategy. It throws FTRT::OutOfSequence when the
* incoming request is not valid.
*/
virtual void check_validity(void);
typedef void (FtRtecEventChannelAdmin::EventChannelFacade::*RollbackOperation)
(const FtRtecEventChannelAdmin::ObjectId&);
/**
* Replicate a request.
*
* @param state The request to be replicated.
* @param rollback The rollback operation when the replication failed.
* @param oid The object id used for rollback operation.
*/
virtual void replicate_request(const FTRT::State& state,
RollbackOperation rollback,
const FtRtecEventChannelAdmin::ObjectId& oid)=0;
/**
* Inform the backup replicas that a new replica has joined the object
* group.
*/
virtual void add_member(const FTRT::ManagerInfo & info,
CORBA::ULong object_group_ref_version)=0;
virtual Replication_Strategy* make_primary_strategy();
virtual int acquire_read (void)=0;
virtual int acquire_write (void)=0;
virtual int release (void)=0;
};
TAO_END_VERSIONED_NAMESPACE_DECL
#endif
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