Technical facts

Application type(s)

Web application

Operating system(s) or programming environment(s)

Lubuntu 11.04 (natty)

IDE(s):

Qt Creator 2.0.1

Project type:

Console application

C++ standard:

C++11

Compiler(s):

G++ 4.5.2

Libraries used:

Boost: version 1.42
STL: GNU ISO C++ Library, version 4.5.2
Wt: version 3.1.9

wtserverpusherclient.cpp


//---------------------------------------------------------------------------

/*

WtServerPusherClient, client of WtServerPusher

Copyright (C) 2011 Richel Bilderbeek



This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.



This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <http://www.gnu.org/licenses/>.

*/

//---------------------------------------------------------------------------

//From http://www.richelbilderbeek.nl/CppWtServerPusherClient.htm

//---------------------------------------------------------------------------

#include <boost/bind.hpp>

//---------------------------------------------------------------------------

#include <Wt/WApplication>

//---------------------------------------------------------------------------

#include "wtserverpusher.h"

#include "wtserverpusherclient.h"

//---------------------------------------------------------------------------

WtServerPusherClient::WtServerPusherClient()

{

  Wt::WApplication::instance()->enableUpdates(true);

  WtServerPusher::GetInstance()->Connect(

    this,boost::bind(&WtServerPusherClient::OnServer,this));



  //Never call virtual functions during construction or destroyion

  //Scott Meyers, Effective C++, item 9

  //OnServer();

}

//---------------------------------------------------------------------------

WtServerPusherClient::~WtServerPusherClient()

{

  Wt::WApplication::instance()->enableUpdates(false);

  WtServerPusher::GetInstance()->Disconnect(this);

}

//---------------------------------------------------------------------------

const std::string WtServerPusherClient::GetVersion()

{

  return "1.0";

}

//---------------------------------------------------------------------------

const std::vector<std::string> WtServerPusherClient::GetVersionHistory()

{

  std::vector<std::string> v;

  v.push_back("2011-07-27: version 1.0: initial version");

  return v;

}

//---------------------------------------------------------------------------

void WtServerPusherClient::OnServer()

{

  OnServerPush();

  Wt::WApplication::instance()->triggerUpdate();

}

//---------------------------------------------------------------------------

wtserverpusherclient.h


//---------------------------------------------------------------------------

#ifndef WTSERVERPUSHERCLIENT_H

#define WTSERVERPUSHERCLIENT_H

//---------------------------------------------------------------------------

#include <string>

#include <vector>

//---------------------------------------------------------------------------

///WtServerPusherClient is a client responding to WtServerPusher

///and to be used as a base class

struct WtServerPusherClient

{

  virtual ~WtServerPusherClient();



  ///Get the version of this class

  static const std::string GetVersion();



  ///Get the version history of this class

  static const std::vector<std::string> GetVersionHistory();



  ///OnServerPush is called when the WtServerPusher is posted to

  virtual void OnServerPush() = 0;



  protected:

  ///WtServerPusherClient constructor is protected

  ///because it is to be used as a base class

  WtServerPusherClient();



  private:

  ///Respond to the server

  void OnServer();

};

//---------------------------------------------------------------------------

#endif // WTSERVERPUSHERCLIENT_H

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(C++) WtServerPusherClient

Technical facts

wtserverpusherclient.cpp

wtserverpusherclient.h