TAO/tao/PortableServer/Upcall_Command.h

   1 // -*- C++ -*-
   2
   3 //=============================================================================
   4 /**
   5  *  @file    Upcall_Command.h
   6  *
   7  *  @author Ossama Othman
   8  */
   9 //=============================================================================
  10
  11 #ifndef TAO_UPCALL_COMMAND_H
  12 #define TAO_UPCALL_COMMAND_H
  13
  14 #include /**/ "ace/pre.h"
  15
  16 #include "tao/PortableServer/portableserver_export.h"
  17
  18 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  19 # pragma once
  20 #endif /* !ACE_LACKS_PRAGMA_ONCE */
  21
  22 #include "tao/Versioned_Namespace.h"
  23
  24 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
  25
  26 namespace TAO
  27 {
  28   /**
  29    * @class Upcall_Command
  30    *
  31    * @brief "ABC" that all operation-specific command objects must
  32    *        subclass.
  33    *
  34    * The actual upcall into a servant is executed through a concrete
  35    * @c Upcall_Command object.  This is necessary to simplify upcall
  36    * interactions in the presence of interceptors, such as when the
  37    * @c send_exception() interception point must be invoked when the
  38    * servant operation throws an exception.
  39    */
  40   class TAO_PortableServer_Export Upcall_Command
  41   {
  42   public:
  43     /// Destructor.
  44     virtual ~Upcall_Command ();
  45
  46     /// Execute the upcall.
  47     virtual void execute () = 0;
  48   };
  49 }  // End namespace TAO
  50
  51 TAO_END_VERSIONED_NAMESPACE_DECL
  52
  53 #include /**/ "ace/post.h"
  54
  55 #endif /* TAO_UPCALL_COMMAND_H */