LogEngine.h

/*
╔══════════════════════════════════════════════════════════════════════════════╗
║                       SIMPLY POWERFUL TOOLKIT (SPTK)                         ║
╟──────────────────────────────────────────────────────────────────────────────╢
║  copyright            © 1999-2022 Alexey Parshin. All rights reserved.       ║
║  email                alexeyp@gmail.com                                      ║
╚══════════════════════════════════════════════════════════════════════════════╝
┌──────────────────────────────────────────────────────────────────────────────┐
│   This library is free software; you can redistribute it and/or modify it    │
│   under the terms of the GNU Library General Public License as published by  │
│   the Free Software Foundation; either version 2 of the License, or (at your │
│   option) any later version.                                                 │
│                                                                              │
│   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 Library   │
│   General Public License for more details.                                   │
│                                                                              │
│   You should have received a copy of the GNU Library 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.               │
│                                                                              │
│   Please report all bugs and problems to alexeyp@gmail.com.                  │
└──────────────────────────────────────────────────────────────────────────────┘
*/
 
#pragma once
 
#include <sptk5/DateTime.h>
#include <sptk5/LogPriority.h>
#include <sptk5/Logger.h>
#include <sptk5/threads/SynchronizedQueue.h>
 
#include <atomic>
#include <iostream>
#include <sptk5/threads/Thread.h>
 
namespace sptk {
 
// Log options
constexpr int LO_STDOUT = 1;   
constexpr int LO_DATE = 2;     
constexpr int LO_TIME = 4;     
constexpr int LO_PRIORITY = 8; 
constexpr int LO_ENABLE = 16;  
 
class SP_EXPORT LogEngine
    : public Thread
{
    friend class Logger;
 
public:
    virtual void saveMessage(const Logger::UMessage& message) = 0;
 
    explicit LogEngine(const String& logEngineName);
 
    ~LogEngine() noexcept override;
 
    virtual void reset()
    {
        // Implement in derived class
    }
 
    void options(int ops)
    {
        m_options = ops;
    }
 
    size_t options() const
    {
        return m_options;
    }
 
    void option(int options, bool flag);
 
    void priority(LogPriority prt)
    {
        m_minPriority = prt;
    }
 
    virtual void minPriority(LogPriority prt)
    {
        m_minPriority = prt;
    }
 
    virtual LogPriority minPriority() const
    {
        return m_minPriority;
    }
 
    static String priorityName(LogPriority prt);
 
    static LogPriority priorityFromName(const String& prt);
 
protected:
    void threadFunction() override;
 
    void log(Logger::UMessage& message);
 
    void shutdown() noexcept;
 
private:
    mutable SharedMutex m_mutex;
 
    std::atomic<LogPriority> m_minPriority {LogPriority::INFO};
 
    std::atomic<uint32_t> m_options {LO_ENABLE | LO_DATE | LO_TIME | LO_PRIORITY};
 
    using MessageQueue = SynchronizedQueue<Logger::UMessage>;
    MessageQueue m_messages;
};
 
} // namespace sptk