LogOutput.h

// This file is a part of the OpenSurgSim project.
// Copyright 2013-2016, SimQuest Solutions Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef SURGSIM_FRAMEWORK_LOGOUTPUT_H
#define SURGSIM_FRAMEWORK_LOGOUTPUT_H

#include <boost/thread/mutex.hpp>
#include <fstream>

namespace SurgSim
{
namespace Framework
{

class LogOutput
{
public:
    LogOutput()
    {
    }

    virtual ~LogOutput()
    {
    }

    virtual bool writeMessage(const std::string& message) = 0;

};

class NullOutput : public LogOutput
{
public:
    virtual bool writeMessage(const std::string& message) {return true;}
};


class FileOutput : public LogOutput
{
public:

    explicit FileOutput(const std::string& filename);

    bool writeMessage(const std::string& message) override;

private:
    std::string m_filename;
    std::ofstream m_stream;
    boost::mutex m_mutex;
};

class StreamOutput : public LogOutput
{
public:

    explicit StreamOutput(std::ostream& ostream); //NOLINT

    bool writeMessage(const std::string& message) override;

private:
    std::ostream& m_stream;
    boost::mutex m_mutex;
};

}; // namespace Framework
}; // namespace SurgSim

#endif // SURGSIM_FRAMEWORK_LOGOUTPUT_H