PrefetchManager.h

/******************************************************************************
Este arquivo eh parte da implementacao do ambiente declarativo do middleware
Ginga (Ginga-NCL).

Direitos Autorais Reservados (c) 1989-2007 PUC-Rio/Laboratorio TeleMidia

Este programa eh software livre; voce pode redistribui-lo e/ou modificah-lo sob
os termos da Licenca Publica Geral GNU versao 2 conforme publicada pela Free
Software Foundation.

Este programa eh distribuido na expectativa de que seja util, porem, SEM
NENHUMA GARANTIA; nem mesmo a garantia implicita de COMERCIABILIDADE OU
ADEQUACAO A UMA FINALIDADE ESPECIFICA. Consulte a Licenca Publica Geral do
GNU versao 2 para mais detalhes.

Voce deve ter recebido uma copia da Licenca Publica Geral do GNU versao 2 junto
com este programa; se nao, escreva para a Free Software Foundation, Inc., no
endereco 59 Temple Street, Suite 330, Boston, MA 02111-1307 USA.

Para maiores informacoes:
ncl @ telemidia.puc-rio.br
http://www.ncl.org.br
http://www.ginga.org.br
http://www.telemidia.puc-rio.br
******************************************************************************
This file is part of the declarative environment of middleware Ginga (Ginga-NCL)

Copyright: 1989-2007 PUC-RIO/LABORATORIO TELEMIDIA, All Rights Reserved.

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License version 2 as published by
the Free Software Foundation.

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 version 2 for more
details.

You should have received a copy of the GNU General Public License version 2
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA

For further information contact:
ncl @ telemidia.puc-rio.br
http://www.ncl.org.br
http://www.ginga.org.br
http://www.telemidia.puc-rio.br
*******************************************************************************/

#ifndef PrefecthManager_H_
#define PrefecthManager_H_

#include "config.h"

#include "IPrefetchManager.h"

#include "system/compat/SystemCompat.h"
using namespace ::br::pucrio::telemidia::ginga::core::system::compat;

#if HAVE_IC
#include "ic/IInteractiveChannelManager.h"
using namespace ::br::pucrio::telemidia::ginga::core::ic;
#endif

#include <sys/stat.h>
#include <map>

namespace br {
namespace pucrio {
namespace telemidia {
namespace ginga {
namespace ncl {
namespace prefetch {
#if HAVE_IC
    class PrefetchManager : public IPrefetchManager,
            public IInteractiveChannelListener {
#else
    class PrefetchManager : public IPrefetchManager {
#endif

        private:
            map<string, string>* localToRemoteUris;
            map<string, string>* urisToLocalRoots;
            set<string>* scheduledRemoteUris;
            set<string>* scheduledLocalUris;
#if HAVE_IC
            IInteractiveChannelManager* icm;
#else
            void* icm;
#endif
            string prefetchRoot;
            bool synch;

            int kbytes;
            int filesDown;
            int filesSched;

            PrefetchManager();
            ~PrefetchManager();
            static IPrefetchManager* _instance;

        public:
            static IPrefetchManager* getInstance();

        private:
            void createDirectory(string newDir);

        public:
            void release();
            void releaseContents();
            string createDocumentPrefetcher(string remoteDocUri);
            string createSourcePrefetcher(string localDocUri, string srcUri);
            bool hasIChannel();
            bool hasRemoteLocation(string localUri);
            string getRemoteLocation(string localUri);
            string getLocalRoot(string remoteUri);

        private:
            void getContent(string remoteUri, string localUri);

        public:
            void setSynchPrefetch(bool synch);

        private:
            void scheduleContent(string remoteUri, string localUri);
            void receiveCode(long respCode){};
            void receiveDataStream(char* buffer, int size){};
            void receiveDataPipe(FILE* fd, int size);
            void downloadCompleted(const char* localUri){};

        public:
            void getScheduledContent(string clientUri);
            void getScheduledContents();
    };
}
}
}
}
}
}

#endif /*PrefetchManager_H_*/