// Copyright CERN and copyright holders of ALICE O2. This software is

// distributed under the terms of the GNU General Public License v3 (GPL

// Version 3), copied verbatim in the file "COPYING".

//

// See http://alice-o2.web.cern.ch/license for full licensing information.

//

// In applying this license CERN does not waive the privileges and immunities

// granted to it by virtue of its status as an Intergovernmental Organization

// or submit itself to any jurisdiction.

/// \file Backend.h

/// \brief Definition of the Backend class

/// \author Charis Kouzinopoulos <charalampos.kouzinopoulos@cern.ch>

#ifndef ALICE_O2_BACKEND_H_

#define ALICE_O2_BACKEND_H_

#include <string>

#include <vector>

#include <FairMQDevice.h>

// Google protocol buffers headers

#include <google/protobuf/stubs/common.h>

namespace o2

{

namespace ccdb

{

class Condition;

class Backend

{

public:

virtual ~Backend() = default;

/// Pack

virtual void Pack(const std::string& path, const std::string& key, std::string*& messageString) = 0;

/// UnPack

virtual Condition* UnPack(std::unique_ptr<FairMQMessage> msg) = 0;

/// Serializes a key (and optionally value) to an std::string using Protocol Buffers

void Serialize(std::string*& messageString, const std::string& key, const std::string& operationType,

const std::string& dataSource, const std::string& object = std::string());

};

}

}

#endif