WingServerCommon/Log/Logger.cs

using System.Diagnostics;

namespace WingServerCommon.Log
{
    /// <summary>
    /// Logger - Should register log engine before usage
    /// </summary>
    public class Logger
    {
        private static ILogEngine _logEngine = new DefaultLogEngine();      

        public static bool Debug { get; set; }

        /// <summary>
        /// Register a log engine
        /// </summary>
        /// <param name="logEngine"></param>
        public static void RegisterEngine(ILogEngine logEngine)
        {
            _logEngine = logEngine;
        }

        /// <summary>
        /// Write log with info level
        /// </summary>
        /// <param name="msg"></param>
        public static void WriteLineInfo(string msg)
        {
            _logEngine.Write(TraceLevel.Info, msg);
        }

        /// <summary>
        /// Write log with warning level
        /// </summary>
        /// <param name="msg"></param>
        public static void WriteLineWarn(string msg)
        {
            _logEngine.Write(TraceLevel.Warning,  msg);
        }

        /// <summary>
        /// Write log with error level
        /// </summary>
        /// <param name="msg"></param>
        public static void WriteLineError(string msg)
        {
            _logEngine.Write(TraceLevel.Error,  msg);
        }
     
        /// <summary>
        /// Write log with verbose level. In most cases we write verbose log in debug mode
        /// </summary>
        /// <param name="msg"></param>
        public static void WriteLineVerbose(string msg)
        {
            _logEngine.Write(TraceLevel.Verbose, msg);
        }

        /// <summary>
        /// Write debug log
        /// </summary>
        /// <param name="msg"></param>

        public static void WriteLineDebug(string msg)
        {            
            if(Debug)
            {
                _logEngine.Write(TraceLevel.Off,  msg);
            }
        }

        class DefaultLogEngine : ILogEngine
        {
            public void Write(TraceLevel level, string msg){
                System.Console.WriteLine("Should register customer log engine first.");
            }
        }
    }
}