C++ NamingContext_var::resolve方法代码示例

Web_Server::Iterator_Factory_ptr
get_iterator (CORBA::ORB_ptr o)
{
  CORBA::ORB_var orb = CORBA::ORB::_duplicate (o);

  // Get a reference to the Name Service.
  CORBA::Object_var obj =
    orb->resolve_initial_references ("NameService");

  // Narrow to a Naming Context
  CosNaming::NamingContext_var nc =
    CosNaming::NamingContext::_narrow (obj.in ());

  if (CORBA::is_nil (obj.in ()))
    {
      ACE_ERROR ((LM_ERROR,
                  ACE_TEXT ("Nil reference to Name Service\n")));
      return Web_Server::Iterator_Factory::_nil ();
    }

  // Create a name.
  CosNaming::Name name;
  name.length (1);
  name[0].id = CORBA::string_dup ("Iterator_Factory");
  name[0].kind = CORBA::string_dup ("");

  obj = nc->resolve (name);

  Web_Server::Iterator_Factory_ptr factory =
    Web_Server::Iterator_Factory::_narrow (obj.in ());

  return factory;
}

void
VOmniORBHelper::nsRegisterObject(CORBA::Object_ptr obj,
				 const char* program, const char* object,
				 int telescopenumber)
  throw(CORBA::SystemException, 
	CosNaming::NamingContext::NotFound,
	CosNaming::NamingContext::CannotProceed,
	CosNaming::NamingContext::InvalidName,
	CosNaming::NamingContext::AlreadyBound)
{
  ZThread::Guard<ZThread::RecursiveMutex> guard(m_mutex);
  CosNaming::NamingContext_var root = nsRootContext();
  CosNaming::Name_var name = 
    nsPathToObjectName(program, object, telescopenumber);

  for(unsigned int n=0; n<name->length()-1; n++)
    {
      CosNaming::Name_var child_name = name;
      child_name->length(n+1);
      
      try
	{
	  CORBA::Object_var object = root->resolve(child_name);
	}
      catch(CosNaming::NamingContext::NotFound)
	{
	  CosNaming::NamingContext_var 
	    child = root->bind_new_context(child_name);
	}
    }

  root->rebind(name,obj);
}

OnlineViewer_var getOnlineViewer(CosNaming::NamingContext_var cxt)
{  
    CosNaming::Name ncName;
    ncName.length(1);
    ncName[0].id = CORBA::string_dup("OnlineViewer");
    ncName[0].kind = CORBA::string_dup("");
    OnlineViewer_var onlineViewer = NULL;
    try {
        onlineViewer = OnlineViewer::_narrow(cxt->resolve(ncName));
    } catch(const CosNaming::NamingContext::NotFound &exc) {
        std::cerr << "OnlineViewer not found: ";
        switch(exc.why) {
        case CosNaming::NamingContext::missing_node:
            std::cerr << "Missing Node" << std::endl;
        case CosNaming::NamingContext::not_context:
            std::cerr << "Not Context" << std::endl;
            break;
        case CosNaming::NamingContext::not_object:
            std::cerr << "Not Object" << std::endl;
            break;
        }
        return 0;
    } catch(CosNaming::NamingContext::CannotProceed &exc) {
        std::cerr << "Resolve OnlineViewer CannotProceed" << std::endl;
        return 0;
    } catch(CosNaming::NamingContext::AlreadyBound &exc) {
        std::cerr << "Resolve OnlineViewer InvalidName" << std::endl;
        return 0;
    }
    return onlineViewer;
}

X_ptr checkCorbaServer(std::string n, CosNaming::NamingContext_var &cxt)
{
  CosNaming::Name ncName;
  ncName.length(1);
  ncName[0].id = CORBA::string_dup(n.c_str());
  ncName[0].kind = CORBA::string_dup("");
  X_ptr srv = NULL;
  try {
    srv = X::_narrow(cxt->resolve(ncName));
  } catch(const CosNaming::NamingContext::NotFound &exc) {
    std::cerr << n << " not found: ";
    switch(exc.why) {
    case CosNaming::NamingContext::missing_node:
      std::cerr << "Missing Node" << std::endl;
    case CosNaming::NamingContext::not_context:
      std::cerr << "Not Context" << std::endl;
      break;
    case CosNaming::NamingContext::not_object:
      std::cerr << "Not Object" << std::endl;
      break;
    }
    return (X_ptr)NULL;
  } catch(CosNaming::NamingContext::CannotProceed &exc) {
    std::cerr << "Resolve " << n << " CannotProceed" << std::endl;
  } catch(CosNaming::NamingContext::AlreadyBound &exc) {
    std::cerr << "Resolve " << n << " InvalidName" << std::endl;
  }
  return srv;
}

ModelLoader_var hrp::getModelLoader(CosNaming::NamingContext_var cxt)
{
    CosNaming::Name ncName;
    ncName.length(1);
    ncName[0].id = CORBA::string_dup("ModelLoader");
    ncName[0].kind = CORBA::string_dup("");
    ModelLoader_var modelLoader = NULL;
    try {
        modelLoader = ModelLoader::_narrow(cxt->resolve(ncName));
        modelLoader->_non_existent();
    } catch(const CosNaming::NamingContext::NotFound &exc) {
        std::cerr << "ModelLoader not found: ";
        switch(exc.why) {
        case CosNaming::NamingContext::missing_node:
            std::cerr << "Missing Node" << std::endl;
        case CosNaming::NamingContext::not_context:
            std::cerr << "Not Context" << std::endl;
            break;
        case CosNaming::NamingContext::not_object:
            std::cerr << "Not Object" << std::endl;
            break;
        }
        modelLoader = ModelLoader::_nil();
    } catch(CosNaming::NamingContext::CannotProceed &exc) {
        std::cerr << "Resolve ModelLoader CannotProceed" << std::endl;
        modelLoader = ModelLoader::_nil();
    } catch(CosNaming::NamingContext::AlreadyBound &exc) {
        std::cerr << "Resolve ModelLoader InvalidName" << std::endl;
        modelLoader = ModelLoader::_nil();
    } catch(...){
        modelLoader = ModelLoader::_nil();
    }
    return modelLoader;
}

int ACE_TMAIN (int argc, ACE_TCHAR *argv[])
{
  try {
    // Initialize orb
    CORBA::ORB_var orb = CORBA::ORB_init( argc, argv );

    //Get reference to Root POA
    CORBA::Object_var obj = orb->resolve_initial_references( "RootPOA" );
    PortableServer::POA_var poa = PortableServer::POA::_narrow( obj.in() );

    // Activate POA Manager
    PortableServer::POAManager_var mgr = poa->the_POAManager();
    mgr->activate();


    // Find the Naming Service
    obj = orb->resolve_initial_references("NameService");
    CosNaming::NamingContext_var root =
      CosNaming::NamingContext::_narrow(obj.in());
    if (CORBA::is_nil(root.in())) {
      std::cerr << "Nil Naming Context reference" << std::endl;
      return 1;
    }

    // Bind the example Naming Context, if necessary
    CosNaming::Name name;
    name.length( 1 );
    name[0].id = CORBA::string_dup("example");
    try {
      obj = root->resolve(name);
    }
    catch(const CosNaming::NamingContext::NotFound&) {
      CosNaming::NamingContext_var dummy = root->bind_new_context(name);
    }

    // Bind the Messenger object
    name.length(2);
    name[1].id = CORBA::string_dup("Messenger");

    // Create an object
    PortableServer::Servant_var<Messenger_i> servant = new Messenger_i;
    PortableServer::ObjectId_var oid = poa->activate_object(servant.in());
    obj = poa->id_to_reference(oid.in());
    Messenger_var messenger = Messenger::_narrow(obj.in());
    root->rebind(name, messenger.in());

    std::cout << "Messenger object bound in Naming Service" << std::endl;

    // Accept requests
    orb->run();
    orb->destroy();
  }
  catch(const CORBA::Exception& ex) {
    std::cerr << "server: Caught a CORBA::Exception: " << ex << std::endl;
    return 1;
  }

  return 0;
}

static CORBA::Object_ptr getObjectReference(CORBA::ORB_ptr orb) {
  CosNaming::NamingContext_var rootContext;
  
  try {
    // Obtain a reference to the root context of the Name service:
    CORBA::Object_var obj;
    obj = orb->resolve_initial_references("NameService");

    // Narrow the reference returned.
    rootContext = CosNaming::NamingContext::_narrow(obj);
    if( CORBA::is_nil(rootContext) ) {
      cerr << "Failed to narrow the root naming context." << endl;
      return CORBA::Object::_nil();
    }
  } catch (CORBA::NO_RESOURCES&) {
    cerr << "Caught NO_RESOURCES exception. You must configure omniORB "
	 << "with the location" << endl
	 << "of the naming service." << endl;
    return 0;
  } catch(CORBA::ORB::InvalidName& ex) {
    // This should not happen!
    cerr << "Service required is invalid [does not exist]." << endl;
    return CORBA::Object::_nil();
  }

  // Create a name object, containing the name test/context:
  CosNaming::Name name;
  name.length(2);

  name[0].id   = (const char*) "test";       // string copied
  name[0].kind = (const char*) "my_context"; // string copied
  name[1].id   = (const char*) "IdServer";
  name[1].kind = (const char*) "Object";
  // Note on kind: The kind field is used to indicate the type
  // of the object. This is to avoid conventions such as that used
  // by files (name.type -- e.g. test.ps = postscript etc.)

  try {
    // Resolve the name to an object reference.
    return rootContext->resolve(name);
  } catch(CosNaming::NamingContext::NotFound& ex) {
    // This exception is thrown if any of the components of the
    // path [contexts or the object] aren't found:
    cerr << "Context not found." << endl;
  } catch(CORBA::TRANSIENT& ex) {
    cerr << "Caught system exception TRANSIENT -- unable to contact the "
         << "naming service." << endl
	 << "Make sure the naming server is running and that omniORB is "
	 << "configured correctly." << endl;

  } catch(CORBA::SystemException& ex) {
    cerr << "Caught a CORBA::" << ex._name()
	 << " while using the naming service." << endl;
    return 0;
  }

  return CORBA::Object::_nil();
}

int ACE_TMAIN(int argc, ACE_TCHAR * argv[])
{
    try
    {
        // Initialize orb
        CORBA::ORB_var orb = CORBA::ORB_init(argc, argv);

        CORBA::Object_var rootObj =
            orb->resolve_initial_references("NameService");

        CosNaming::NamingContext_var rootContext =
            CosNaming::NamingContext::_narrow(rootObj.in());

        CosNaming::Name name;
        name.length (1);
        name[0].id = CORBA::string_dup ("MessengerService");

        CORBA::Object_var messengerObj = rootContext->resolve(name);

        if (CORBA::is_nil(messengerObj.in())) {
            std::cerr << "Nil Messenger reference" << std::endl;
            return 1;
        }

        // Narrow
        Messenger_var messenger = Messenger::_narrow(messengerObj.in());
        if (CORBA::is_nil(messenger.in ())) {
            std::cerr << "Argument is not a Messenger reference" << std::endl;
            return 1;
        }

        CORBA::String_var message = CORBA::string_dup(
                                        "We are experiencing network problems.");
        messenger->send_message ("[email protected]",
                                 "urgent",
                                 message.inout());

        message = CORBA::string_dup("Where can I get TAO?");
        messenger->send_message ("[email protected]",
                                 "OCI's Distribution of TAO",
                                 message.inout());

        message = CORBA::string_dup(
                      "Please contact [email protected] regarding your request.");
        messenger->send_message ("[email protected]",
                                 "OCI's Distribution of TAO",
                                 message.inout());

    }
    catch(const CORBA::Exception& ex) {
        std::cerr << "Caught a CORBA exception: " << ex << std::endl;
        return 1;
    }

    std::cout << "MessengerClient: success" << std::endl;
    return 0;
}

int main( int argc, char *argv[] )
{
  try 
  {
    // Initialize the CORBA Object Request Broker
    CORBA::ORB_var orb = CORBA::ORB_init( argc, argv );

	// Find the CORBA Services Naming Service
	CORBA::Object_var naming_obj = orb->resolve_initial_references("NameService");
	CosNaming::NamingContext_var root = CosNaming::NamingContext::_narrow(naming_obj.in());
	if(CORBA::is_nil(root.in()))
	{
		cerr << "Could not narrow NameService to NamingContext!" << endl;
		throw 0;
	}

    // Resolve the desired object (ExampleInterfaces.IAdder).
	// The module and interface bindings need to be the same here in the client as they
	// are in the server.
    CosNaming::Name name;
    name.length(2);
    name[0].id = CORBA::string_dup( "ExampleInterfaces" );	// IDL-defined Module (namespace)
    name[1].id = CORBA::string_dup( "IAdder" );				// IDL-defined Interface (interface class)
    CORBA::Object_var obj = root->resolve(name);

    // Narrow to confirm that we have the interface we want.
	ExampleInterfaces::IAdder_var iAdder = ExampleInterfaces::IAdder::_narrow(obj.in());
    if (CORBA::is_nil(iAdder.in())) 
	{
      cerr << "Could not narrow to an iAdder reference" << endl;
      return 1;
    }

	// Now use the remote object...
	cout << "Using a remote object that implements the IAdder interface..." << endl;
	cout << endl;
	double number1 = 0;
	double number2 = 0;
	double sum = 0;
	while (true)
	{
		cout << "Enter the first number: ";
		cin >> number1;
		cout << "Enter the second number: ";
		cin >> number2;
		sum = iAdder->add(number1, number2);
		cout << "The sum is: " << sum << endl;
		cout << "------------------" << endl;
	}
  }
  catch ( CORBA::Exception& ex ) {
    cerr << "Caught a CORBA::Exception: " << ex << endl;
    return 1;
  }
  
  return 0;
}

static void checkLogging(ACSDaemonContext * context, short instance)
{
	if (!loggingSystemInitialized)
	{
		// we need msg_callback to get LoggingProxy
		if (ACE_LOG_MSG->msg_callback () != 0 &&
				context->hasConfigurationReference(instance, acsServices[NAMING_SERVICE].xmltag))
		{
			try
			{
				// we get via NS and not a manager (to support logging when manager is not running)
				std::string nsReference = context->getConfigurationReference(instance, acsServices[NAMING_SERVICE].xmltag);
				CORBA::Object_var nc_obj = context->getORB()->string_to_object(nsReference.c_str());
				if (nc_obj.ptr() != CORBA::Object::_nil())
				{
					CosNaming::NamingContext_var nc = CosNaming::NamingContext::_narrow(nc_obj.in());
					if (nc.ptr() != CosNaming::NamingContext::_nil())
					{
						CosNaming::Name name;
						name.length(1);
						name[0].id = CORBA::string_dup("Log");

						CORBA::Object_var obj = nc->resolve(name);
						if (!CORBA::is_nil(obj.in()))
                    	{
							Logging::AcsLogService_var logger = Logging::AcsLogService::_narrow(obj.in());

							LoggingProxy* lp = static_cast<LoggingProxy*>(ACE_LOG_MSG->msg_callback());
							lp->setCentralizedLogger(logger.in());
							lp->setNamingContext(nc.in());
                            loggingSystemInitialized = true;
                            ACS_SHORT_LOG((LM_DEBUG, "Remote logging system initialized."));
                        }
						else
						{
							ACS_SHORT_LOG((LM_DEBUG, "Unable to resolve Log from the naming service."));
						}
					}
					else
					{
						ACS_SHORT_LOG((LM_DEBUG, "Unable to narrow NamingContext."));
					}
				}
				else
				{
					ACS_SHORT_LOG((LM_ERROR, "Unable to resolve naming service, invalid corbaloc reference: '%s'.", nsReference.c_str()));
				}
			}
			catch (...)
			{
				ACS_SHORT_LOG((LM_DEBUG, "Unable to initialize logging sytem, unexpected exception caught."));
			}
		}
	}
}

CORBA::Object_ptr getObjectReference(CORBA::ORB_ptr orb, const char serviceName[])
{  
   CosNaming::NamingContext_var rootContext;

   try
   {  
      // Obtain a reference to the root context of the name service:
      CORBA::Object_var initServ;
      initServ = orb->resolve_initial_references("NameService");

      // Narrow the object returned by resolve_initial_references() to a CosNaming::NamingContext 
      // object
      rootContext = CosNaming::NamingContext::_narrow(initServ);
      if (CORBA::is_nil(rootContext))
      {  
         cerr << "Failed to narrow naming context." << endl;
         return CORBA::Object::_nil();
      }
   }
   catch (CORBA::ORB::InvalidName&)
   {  
      cerr << "Name service does not exist." << endl;
      return CORBA::Object::_nil();
   }

   // Create a name object, containing the name corejava/SysProp:
   CosNaming::Name name;
   name.length(1);

   name[0].id   = serviceName;
   name[0].kind = "Object";

   CORBA::Object_ptr obj;
   try
   {  
      // Resolve the name to an object reference, and assign the returned reference to a 
      // CORBA::Object:
      obj = rootContext->resolve(name);
   }
   catch (CosNaming::NamingContext::NotFound&)
   {  
      // This exception is thrown if any of the components of the path [contexts or the object] 
      // aren't found:
      cerr << "Context not found." << endl;
      return CORBA::Object::_nil();
   }
   return obj;
}

void
ClientInitializer::post_init (PortableInterceptor::ORBInitInfo_ptr info)
{
  // Find the Naming Service
  CORBA::Object_var naming_obj =
    info->resolve_initial_references("NameService");
  CosNaming::NamingContext_var root =
    CosNaming::NamingContext::_narrow(naming_obj.in());
  if( CORBA::is_nil(root.in())) {
    std::cerr << "Nil Naming Context reference" << std::endl;
    ACE_ASSERT(false);
  }

  // Resolve the Messenger object
  CosNaming::Name name;
  name.length( 1 );
  name[0].id = CORBA::string_dup( "Messenger" );
  CORBA::Object_var obj = CORBA::Object::_nil();
  while ( CORBA::is_nil( obj.in() ) ) {
    try {
      obj = root->resolve( name );
    } catch (const CosNaming::NamingContext::NotFound&) {
      // Sleep for a second and try again
      ACE_OS::sleep(1);
    }
   }

  Messenger_var messenger = Messenger::_narrow( obj.in() );
  if( CORBA::is_nil( messenger.in() ) ) {
    std::cerr << "Not a Messenger reference" << std::endl;
    ACE_ASSERT(false);
  }

  // allocate slot
  slot_ = info->allocate_slot_id();

  // get PICurrent
  CORBA::Object_var current_obj = info->resolve_initial_references("PICurrent");

  current_ =
    PortableInterceptor::Current::_narrow(current_obj.in());

  // Create and register the request interceptors.
  PortableInterceptor::ClientRequestInterceptor_var ci =
      new ClientInterceptor(messenger, current_.in(), slot_);
  info->add_client_request_interceptor (ci.in());
}

/** Bind a context to the corba root, with a given name.
 */
void CorbaServerGeneric::
createContext( const std::string & contextStrName )
{

  try {

    /* Obtains a reference to the root context of the Name service
     * and narrows the reference returned. */
    CosNaming::NamingContext_var rootContext = CosNaming::NamingContext::
      _narrow(orb->resolve_initial_references("NameService"));
    if( CORBA::is_nil(rootContext) )
      {
        std::cerr << "Failed to narrow the root naming context." << std::endl;
        throw "TODO";
      }

    /* Create the name of the context. */
    CosNaming::Name contextName;
    contextName.length(1);
    contextName[0].id   = CORBA::string_dup(contextStrName.c_str());
    contextName[0].kind = CORBA::string_dup("context");
    /* Note on kind: The kind field is used to indicate the type
     * of the object. This is to avoid conventions such as that used
     * by files (name.type -- e.g. hpp.ps = postscript etc.). */

    /* Bind a context called <contextName> to the root context. */
    try{ hppContext = rootContext->bind_new_context(contextName); }
    catch(CosNaming::NamingContext::AlreadyBound& ex)
      {
        /* If the context already exists, this exception will be raised.
         * In this case, just resolve the name and assign hppContext
         * to the object returned. */
        hppContext = CosNaming::NamingContext::
          _narrow(rootContext->resolve(contextName));
        if( CORBA::is_nil(hppContext) )
          {
            std::cerr << "Failed to narrow naming context." << std::endl;
            throw "TODO";
          }
      }
  } HPP_RETHROW("Creating context");

  return;
}

int loadBodyFromModelLoader(::World* world, const char* name, const char *url, CosNaming::NamingContext_var cxt)
{
    CosNaming::Name ncName;
    ncName.length(1);
    ncName[0].id = CORBA::string_dup("ModelLoader");
    ncName[0].kind = CORBA::string_dup("");
    ModelLoader_var modelLoader = NULL;
    try {
        modelLoader = ModelLoader::_narrow(cxt->resolve(ncName));
    } catch(const CosNaming::NamingContext::NotFound &exc) {
        std::cerr << "ModelLoader not found: ";
        switch(exc.why) {
        case CosNaming::NamingContext::missing_node:
            std::cerr << "Missing Node" << std::endl;
        case CosNaming::NamingContext::not_context:
            std::cerr << "Not Context" << std::endl;
            break;
        case CosNaming::NamingContext::not_object:
            std::cerr << "Not Object" << std::endl;
            break;
        }
        return 0;
    } catch(CosNaming::NamingContext::CannotProceed &exc) {
        std::cerr << "Resolve ModelLoader CannotProceed" << std::endl;
    } catch(CosNaming::NamingContext::AlreadyBound &exc) {
        std::cerr << "Resolve ModelLoader InvalidName" << std::endl;
    }

	BodyInfo_var bodyInfo;
	try {
		bodyInfo = modelLoader->getBodyInfo(url);
	} catch(CORBA::SystemException& ex) {
		std::cerr << "CORBA::SystemException raised by ModelLoader: " << ex._rep_id() << std::endl;
		return 0;
	} catch(ModelLoader::ModelLoaderException& ex){
		std::cerr << "ModelLoaderException ( " << ex.description << ") : " << ex.description << std::endl;
	}

	if(CORBA::is_nil(bodyInfo)){
		return 0;
	}

	return loadBodyFromBodyInfo(world, name, bodyInfo);
}

static CORBA::Object_ptr
get_distributor_reference (CORBA::ORB_ptr orb)
{
  if (use_naming)
    {
      CORBA::Object_var tmp =
        orb->resolve_initial_references ("NameService");

      CosNaming::NamingContext_var pns =
        CosNaming::NamingContext::_narrow (tmp.in ());

      CosNaming::Name name (1);
      name.length (1);
      name[0].id = distributor_name.c_str ();

      return pns->resolve (name);
    }
  else
    // Read and destringify the Stock_Distributor object's IOR.
    return orb->string_to_object (ior.c_str ());
}