Endpoint_Selector_Factory.h

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// -*- C++ -*-

//=============================================================================
/**
 *  @file   Endpoint_Selector_Factory.h
 *
 *  $Id: Endpoint_Selector_Factory.h 79829 2007-10-23 12:39:52Z johnnyw $
 *
 * Strategies for selecting profile/endpoint from an IOR for making an
 * invocation.
 *
 *  @author Marina Spivak <marina@cs.wustl.edu>
 *  @author Frank Hunleth <fhunleth@cs.wustl.edu>
 */
//=============================================================================

#ifndef TAO_ENDPOINT_SELECTOR_FACTORY_H
#define TAO_ENDPOINT_SELECTOR_FACTORY_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/Service_Object.h"

TAO_BEGIN_VERSIONED_NAMESPACE_DECL

namespace CORBA
{
  class Exception;
}

class TAO_Invocation_Endpoint_Selector;


// ****************************************************************

/**
 * @class TAO_Endpoint_Selector_Factory
 *
 * @brief Factory for initializing <Endpoint_Selection_State> and
 * obtaining appropriate <Invocation_Endpoint_Selector>.
 *
 * Used by Invocation classes to intialize its endpoint selection
 * strategy and state based on the effective policies.
 * Endpoint selection strategies are stateless objects - all the
 * state they need is contained by Invocation in
 * <Endpoint_Selection_State>.  Thus, rather than allocating an
 * endpoint selection strategy object for each Invocation, the
 * factory simply returns the appropriate one from the
 * set preallocated in the ORB_Core.  One endpoint selection
 * strategy object can be used by many invocations concurrently.
 */
class TAO_Export TAO_Endpoint_Selector_Factory
  : public ACE_Service_Object
{
public:
  /// Destructor.
  virtual ~TAO_Endpoint_Selector_Factory (void);

  /// Get an Invocation's endpoint selection strategy and
  /// initialize the endpoint selection state instance.
  virtual TAO_Invocation_Endpoint_Selector *get_selector (void) = 0;
};

TAO_END_VERSIONED_NAMESPACE_DECL

#include /**/ "ace/post.h"
#endif  /* TAO_ENDPOINT_SELECTOR_FACTORY_H */

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