TAO/tao/Load_Protocol_Factory_T.h

   1 // -*- C++ -*-
   2
   3 //=============================================================================
   4 /**
   5  *  @file Load_Protocol_Factory_T.h
   6  *
   7  *  Function templates to load a protocol factory.
   8  *
   9  *  @author  Johnny Willemsen
  10  */
  11 //=============================================================================
  12
  13 #ifndef TAO_LOAD_PROTOCOL_FACTORY_T_H
  14 #define TAO_LOAD_PROTOCOL_FACTORY_T_H
  15
  16 #include /**/ "ace/pre.h"
  17
  18 #include "tao/Protocol_Factory.h"
  19 #include "tao/Resource_Factory.h"
  20 #include "tao/debug.h"
  21 #include <memory>
  22 #include "ace/Dynamic_Service.h"
  23
  24 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
  25
  26 namespace TAO
  27 {
  28   namespace details
  29   {
  30     template<typename T>
  31     int
  32     load_protocol_factory (TAO_ProtocolFactorySet &protocol_set,
  33                            const char *name)
  34     {
  35       TAO_Protocol_Factory *protocol_factory = 0;
  36       std::unique_ptr<TAO_Protocol_Factory> safe_protocol_factory;
  37
  38       TAO_Protocol_Item *item = 0;
  39
  40       // If a protocol factory is obtained from the Service
  41       // Configurator then do not transfer ownership to the
  42       // TAO_Protocol_Item.
  43       bool transfer_ownership = false;
  44
  45       protocol_factory =
  46         ACE_Dynamic_Service<TAO_Protocol_Factory>::instance (
  47           ACE_TEXT_CHAR_TO_TCHAR (name));
  48
  49       if (protocol_factory == 0)
  50         {
  51           if (TAO_debug_level > 0)
  52             TAOLIB_ERROR ((LM_WARNING,
  53                         ACE_TEXT("(%P|%t) WARNING - No <%C> found in Service")
  54                         ACE_TEXT(" Repository. Using default instance.\n"),
  55                         name));
  56
  57           ACE_NEW_RETURN (protocol_factory,
  58                           T,
  59                           -1);
  60
  61           safe_protocol_factory.reset (protocol_factory);
  62
  63           transfer_ownership = true;
  64         }
  65       else
  66         {
  67           transfer_ownership = false;
  68         }
  69
  70       ACE_NEW_RETURN (item, TAO_Protocol_Item (name), -1);
  71       // If the TAO_Protocol_Item retains ownership of the
  72       // TAO_Protocol_Factory then we used an auto_ptr<> above, so
  73       // release the TAO_Protocol_Factory from it.  Otherwise, we
  74       // obtained the TAO_Protocol_Factory from the Service
  75       // Configurator so an auto_ptr<> wasn't used since the Service
  76       // Configurator retains ownership, hence there was no need to
  77       // use an auto_ptr<> in this method.
  78       item->factory ((transfer_ownership ?
  79                       safe_protocol_factory.release () :
  80                       protocol_factory),
  81                       transfer_ownership);
  82
  83       if (protocol_set.insert (item) == -1)
  84         {
  85           TAOLIB_ERROR ((LM_ERROR,
  86                       ACE_TEXT("TAO (%P|%t) Unable to add ")
  87                       ACE_TEXT("<%C> to protocol factory set.\n"),
  88                       item->protocol_name ().c_str ()));
  89
  90           delete item;
  91
  92           if (transfer_ownership == false)
  93             delete protocol_factory;
  94
  95           return -1;
  96         }
  97
  98       if (TAO_debug_level > 0)
  99         {
 100           TAOLIB_DEBUG ((LM_DEBUG,
 101                       ACE_TEXT("TAO (%P|%t) - Loaded default ")
 102                       ACE_TEXT("protocol <%C>\n"),
 103                       name));
 104         }
 105
 106       return 0;
 107     }
 108   }
 109 }
 110
 111 TAO_END_VERSIONED_NAMESPACE_DECL
 112
 113 #include /**/ "ace/post.h"
 114
 115 #endif  /* TAO_LOAD_PROTOCOL_FACTORY_T_H*/