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// -*- C++ -*-
//=============================================================================
/**
* @file Invocation_Endpoint_Selectors.h
*
* $Id$
*
* Strategies for selecting profile/endpoint from an IOR for making an
* invocation.
*
* @author Marina Spivak <marina@cs.wustl.edu>
*/
//=============================================================================
#ifndef TAO_INVOCATION_ENDPOINT_SELECTOR_H
#define TAO_INVOCATION_ENDPOINT_SELECTOR_H
#include /**/ "ace/pre.h"
#include "tao/TAO_Export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "tao/Versioned_Namespace.h"
#include "ace/CORBA_macros.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
class ACE_Time_Value;
ACE_END_VERSIONED_NAMESPACE_DECL
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
class TAO_MProfile;
namespace TAO
{
class Profile_Transport_Resolver;
}
namespace CORBA
{
class Exception;
class Environment;
}
/**
* @class TAO_Invocation_Endpoint_Selector
*
* @brief Defines the interface for policy-based endpoint selection
* strategies.
*
* Selects/reselects server endpoint for an Invocation. Different
* concrete strategies perform selection based on different
* policies.
* @par
* All endpoint selection strategies are stateless objects - any
* necessary state is stored in Invocation's
* @c endpoint_selection_state_.
*/
class TAO_Export TAO_Invocation_Endpoint_Selector
{
public:
/// Destructor.
virtual ~TAO_Invocation_Endpoint_Selector (void);
/// Select the endpoint and set @a r's @c profile_
virtual void select_endpoint (TAO::Profile_Transport_Resolver *r,
ACE_Time_Value *val
ACE_ENV_ARG_DECL) = 0;
};
// ****************************************************************
/**
* @class TAO_Default_Endpoint_Selector
*
* @brief Default strategy for endpoint selection.
*
* This strategy is used when there are no policies set or when
* the only policy set is RTCORBA::PriorityModelPolicy and its
* value is RTCORBA::SERVER_DECLARED.
* The strategy is to try the first endpoint from the first
* profile in the IOR. If that doesn't work, try the next
* profile, and so on.
*/
class TAO_Export TAO_Default_Endpoint_Selector
: public TAO_Invocation_Endpoint_Selector
{
public:
/// Destructor.
virtual ~TAO_Default_Endpoint_Selector (void);
virtual void select_endpoint (TAO::Profile_Transport_Resolver *r,
ACE_Time_Value *val
ACE_ENV_ARG_DECL);
};
TAO_END_VERSIONED_NAMESPACE_DECL
#include /**/ "ace/post.h"
#endif /* TAO_INVOCATION_ENDPOINT_SELECTOR_H */
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