server_object.cpp

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/******************************************************************************
 *   Copyright (C) 2013-2014 by Alexander Rykovanov                        *
 *   rykovanov.as@gmail.com                                                   *
 *                                                                            *
 *   This library is free software; you can redistribute it and/or modify     *
 *   it under the terms of the GNU Lesser General Public License as           *
 *   published by the Free Software Foundation; version 3 of the License.     *
 *                                                                            *
 *   This library is distributed in the hope that it will be useful,          *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of           *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            *
 *   GNU Lesser General Public License for more details.                      *
 *                                                                            *
 *   You should have received a copy of the GNU Lesser General Public License *
 *   along with this library; if not, write to the                            *
 *   Free Software Foundation, Inc.,                                          *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.                *
 ******************************************************************************/

#include "server_object.h"

#include <boost/chrono.hpp>
#include <opc/ua/node.h>
#include <opc/ua/server/addons/services_registry.h>
#include <functional>
#include <iostream>

#ifdef WIN32
#undef GetObject
#endif

namespace
{
OpcUa::RelativePathElement GetHierarchicalElement(const std::string & browseName)
{
  OpcUa::RelativePathElement element;
  element.ReferenceTypeId = OpcUa::ObjectId::HierarchicalReferences;
  element.IncludeSubtypes = true;
  element.TargetName.Name = browseName;
  return element;
}


OpcUa::RelativePath GetCurrentTimeRelativepath()
{
  OpcUa::RelativePath path;
  path.Elements.push_back(GetHierarchicalElement(OpcUa::Names::ServerStatus));
  path.Elements.push_back(GetHierarchicalElement(OpcUa::Names::CurrentTime));
  return path;
}
}

namespace OpcUa
{
namespace Server
{

ServerObject::ServerObject(Services::SharedPtr services, boost::asio::io_service & io, bool debug)
  : Server(services)
//  , Io(io)
  , Debug(debug)
  , Instance(CreateServerObject(services))
  , ServerTime(Instance.GetVariable(GetCurrentTimeRelativepath()))
  , Timer(io)
{
  Timer.Start(boost::posix_time::seconds(1), [this]()
  {
    UpdateTime();
  });
  //Set many values in address space which are expected by clients
  std::vector<std::string> uris;
  uris.push_back("http://opcfoundation.org/UA/");
  uris.push_back("http://freeopcua.github.io");
  Node node = Node(Server, ObjectId::Server_NamespaceArray);
  node.SetValue(uris);
  node = Node(Server, ObjectId::Server_ServerStatus_BuildInfo_ManufacturerName);
  node.SetValue(std::string("FreeOpcUa"));
  node = Node(Server, ObjectId::Server_ServerCapabilities_LocaleIdArray);
  node.SetValue(std::vector<std::string>({ "en" }));
  node = Node(Server, ObjectId::Server_ServerStatus_BuildInfo_BuildNumber);
  node.SetValue(std::string("0.8"));
  node = Node(Server, ObjectId::Server_ServerStatus_BuildInfo_ProductName);
  node.SetValue(std::string("FreeOpcUa"));
  node = Node(Server, ObjectId::Server_ServerStatus_BuildInfo_ProductUri);
  node.SetValue(std::string("https://freeopcua.github.io"));
  node = Node(Server, ObjectId::Server_ServerStatus_State);
  node.SetValue((int32_t) 0);
  node = Node(Server, ObjectId::Server_ServerStatus_CurrentTime);
  node.SetValue(DateTime::Current());//Set time before the thread does it

}

ServerObject::~ServerObject()
{
  if (Debug) { std::clog << "server_object| canceling timer..." << std::endl; }

  Timer.Cancel();

  if (Debug) { std::clog << "server_object| timer stopped." << std::endl; }
}

Model::Object ServerObject::CreateServerObject(const Services::SharedPtr & services) const
{
  Model::Server server(services);
  Model::Object serverObject = server.GetObject(ObjectId::Server);
  return serverObject;
}

void ServerObject::UpdateTime()
{
  try
    {
      DateTime t = OpcUa::DateTime::Current();
      DataValue timeData(t);
      timeData.SetSourceTimestamp(t);
      timeData.SetServerTimestamp(t);

      if (Debug) { std::clog << "server_object| Updating server time: " << t << std::endl; }

      ServerTime.SetValue(timeData);
    }

  catch (std::exception & ex)
    {
      std::cerr << "Failed to update time at server object: " << ex.what() << std::endl;
    }

}

} // namespace UaServer
} // namespace OpcUa