背景

1. 项目开发中，我们或多或少会使用诸如NLog，Log4Net，Kafka+ELK等等日志套件；

2. 基于关注点分离原则，业务开发的时候不应该关注日志具体实现；并且后续能方便切换其他日志套件；

3. 这里先实现基于文件的日志服务，在下一篇将实现基于Kafka+ELK；

4. 具体源码：MasterChief

5. Nuget：Install-Package MasterChief.DotNet.Core.Log

6. 欢迎Star，欢迎Issues；

日志接口定义

/// <summary>
///     日志记录接口
/// </summary>
public interface ILogService
{
    #region Methods
 
    /// <summary>
    ///     Debug记录
    /// </summary>
    /// <param name="message">日志信息</param>
    void Debug(string message);
 
    /// <summary>
    ///     Debug记录
    /// </summary>
    /// <param name="message">日志信息</param>
    /// <param name="ex">异常信息</param>
    void Debug(string message, Exception ex);
 
    /// <summary>
    ///     Error记录
    /// </summary>
    /// <param name="message">日志信息</param>
    void Error(string message);
 
    /// <summary>
    ///     Error记录
    /// </summary>
    /// <param name="message">日志信息</param>
    /// <param name="ex">异常信息</param>
    void Error(string message, Exception ex);
 
    /// <summary>
    ///     Fatal记录
    /// </summary>
    /// <param name="message">日志信息</param>
    void Fatal(string message);
 
    /// <summary>
    ///     Fatal记录
    /// </summary>
    /// <param name="message">日志信息</param>
    /// <param name="ex">异常信息</param>
    void Fatal(string message, Exception ex);
 
    /// <summary>
    ///     Info记录
    /// </summary>
    /// <param name="message">日志信息</param>
    void Info(string message);
 
    /// <summary>
    ///     Info记录
    /// </summary>
    /// <param name="message">日志信息</param>
    /// <param name="ex">异常信息</param>
    void Info(string message, Exception ex);
 
    /// <summary>
    ///     Warn记录
    /// </summary>
    /// <param name="message">日志信息</param>
    void Warn(string message);
 
    /// <summary>
    ///     Warn记录
    /// </summary>
    /// <param name="message">日志信息</param>
    /// <param name="ex">异常信息</param>
    void Warn(string message, Exception ex);
 
    #endregion Methods
}

基于Log4Net本地文件日志服务实现

/// <summary>
///     基于Log4Net的文件日志记录
/// </summary>
public sealed class FileLogService : ILogService
{
    #region Constructors
 
    static FileLogService()
    {
        DebugLogger = LogManager.GetLogger(DebugLoggerName);
        InfoLogger = LogManager.GetLogger(InfoLoggerName);
        WarnLogger = LogManager.GetLogger(WarnLoggerName);
        ErrorLogger = LogManager.GetLogger(ErrorLoggerName);
        FatalLogger = LogManager.GetLogger(FatalLoggerName);
    }
 
    #endregion Constructors
 
    #region Fields
 
    /// <summary>
    ///     The debug logger name
    /// </summary>
    public const string DebugLoggerName = "DEBUG_FileLogger";
 
    /// <summary>
    ///     The error logger name
    /// </summary>
    public const string ErrorLoggerName = "ERROR_FileLogger";
 
    /// <summary>
    ///     The fatal logger name
    /// </summary>
    public const string FatalLoggerName = "FATAL_FileLogger";
 
    /// <summary>
    ///     The information logger name
    /// </summary>
    public const string InfoLoggerName = "INFO_FileLogger";
 
    /// <summa