Logger.cs 4.89 KB
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/*
Logger.cs
Copyright (C) 2015  Belledonne Communications, Grenoble, France
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 2
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, write to the Free Software
14
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
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*/

using Linphone.Core;
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using System;


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namespace Linphone.Agents
{
    /// <summary>
    /// Class to handle the logging of the application
    /// </summary>
    public sealed class Logger
    {
        /// <summary>
        /// The trace listener to which to send the messages to be logged
        /// </summary>
        public OutputTraceListener TraceListener { get;  set; }

        private Logger()
        {
        }

        private static Logger singleton;

        /// <summary>
        /// Static instance of the class.
        /// </summary>
        public static Logger Instance
        {
            get
            {
                if (Logger.singleton == null)
                    Logger.singleton = new Logger();

                return Logger.singleton;
            }
        }

        /// <summary>
        /// Write a message to the logs
        /// </summary>
        /// <param name="level">The trace level of the message to be written</param>
        /// <param name="msg">The message to be written</param>
        private void Write(OutputTraceLevel level, String msg)
        {
            if (TraceListener != null)
            {
                TraceListener.OutputTrace(level, msg);
            }
        }

        /// <summary>
        /// Write a debug message
        /// </summary>
        /// <param name="msg">The message to be written</param>
        public static void Dbg(String msg)
        {
            Logger.Instance.Write(OutputTraceLevel.Debug, msg);
        }

        /// <summary>
        /// Write a debug message with a format and some arguments
        /// </summary>
        /// <param name="fmt">The format of the message to be written</param>
        /// <param name="args">The arguments to fill the format with</param>
        public static void Dbg(String fmt, params object[] args)
        {
            Logger.Instance.Write(OutputTraceLevel.Debug, String.Format(fmt, args));
        }

        /// <summary>
        /// Write a standard message
        /// </summary>
        /// <param name="msg">The message to be written</param>
        public static void Msg(String msg)
        {
            Logger.Instance.Write(OutputTraceLevel.Message, msg);
        }

        /// <summary>
        /// Write a standard message with a format and some arguments
        /// </summary>
        /// <param name="fmt">The format of the message to be written</param>
        /// <param name="args">The arguments to fill the format with</param>
        public static void Msg(String fmt, params object[] args)
        {
            Logger.Instance.Write(OutputTraceLevel.Message, String.Format(fmt, args));
        }

        /// <summary>
        /// Write a warning message
        /// </summary>
        /// <param name="msg">The message to be written</param>
        public static void Warn(String msg)
        {
            Logger.Instance.Write(OutputTraceLevel.Warning, msg);
        }

        /// <summary>
        /// Write a warning message with a format and some arguments
        /// </summary>
        /// <param name="fmt">The format of the message to be written</param>
        /// <param name="args">The arguments to fill the format with</param>
        public static void Warn(String fmt, params object[] args)
        {
            Logger.Instance.Write(OutputTraceLevel.Warning, String.Format(fmt, args));
        }

        /// <summary>
        /// Write an error message
        /// </summary>
        /// <param name="msg">The message to be written</param>
        public static void Err(String msg)
        {
            Logger.Instance.Write(OutputTraceLevel.Error, msg);
        }

        /// <summary>
        /// Write an error message with a format and some arguments
        /// </summary>
        /// <param name="fmt">The format of the message to be written</param>
        /// <param name="args">The arguments to fill the format with</param>
        public static void Err(String fmt, params object[] args)
        {
            Logger.Instance.Write(OutputTraceLevel.Error, String.Format(fmt, args));
        }
    }
}