原理

使用列队先缓存到内存，独立线程从列队中使用log4net写到磁盘上。

日志写入列队

public void EnqueueMessage(string message, FlashLogLevel level, Exception ex = null)
{if ((level == FlashLogLevel.Debug && _log.IsDebugEnabled)|| (level == FlashLogLevel.Error && _log.IsErrorEnabled)|| (level == FlashLogLevel.Fatal && _log.IsFatalEnabled)|| (level == FlashLogLevel.Info && _log.IsInfoEnabled)|| (level == FlashLogLevel.Warn && _log.IsWarnEnabled)){_que.Enqueue(new FlashLogMessage{Message = "[" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss,fff") + "]\r\n" + message,Level = level,Exception = ex});// 通知线程往磁盘中写日志_mre.Set();}
}

队列写入日志

/// <summary>
/// 另一个线程记录日志，只在程序初始化时调用一次
/// </summary>
public void Register()
{Thread t = new Thread(new ThreadStart(WriteLog));t.IsBackground = false;t.Start();
}/// <summary>
/// 从队列中写日志至磁盘
/// </summary>
private void WriteLog()
{while (true){// 等待信号通知_mre.WaitOne();FlashLogMessage msg;// 判断是否有内容需要如磁盘 从列队中获取内容，并删除列队中的内容while (_que.Count > 0 && _que.TryDequeue(out msg)){// 判断日志等级，然后写日志switch (msg.Level){case FlashLogLevel.Debug:_log.Debug(msg.Message, msg.Exception);break;case FlashLogLevel.Info:_log.Info(msg.Message, msg.Exception);break;case FlashLogLevel.Error:_log.Error(msg.Message, msg.Exception);break;case FlashLogLevel.Warn:_log.Warn(msg.Message, msg.Exception);break;case FlashLogLevel.Fatal:_log.Fatal(msg.Message, msg.Exception);break;}}// 重新设置信号_mre.Reset();          Thread.Sleep(1);}
}

应用注意事项

需要在程序启动时注册，如asp.net 程序中在Global.asax中的Application_Start注册。

注册示例

public class MvcApplication : System.Web.HttpApplication
{protected void Application_Start(){AreaRegistration.RegisterAllAreas();FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);RouteConfig.RegisterRoutes(RouteTable.Routes);BundleConfig.RegisterBundles(BundleTable.Bundles);FlashLogger.Instance().Register();}
}

 使用

调用FlashLogger的静态方法

FlashLogger.Debug("Debug");
FlashLogger.Debug("Debug", new Exception("testexception"));
FlashLogger.Info("Info");
FlashLogger.Fatal("Fatal");
FlashLogger.Error("Error");
FlashLogger.Warn("Warn", new Exception("testexception"));

参考链接

C# 超高速高性能写日志https://mp.weixin.qq.com/s?__biz=MzA4MTQyNDk4OA==&mid=2456958300&idx=2&sn=9c949a184d13e23f98e82417ac729421&chksm=895b198dcdf167e226da852887a430b409d74997d18ded44e20858db53fd841448fe11b93d96&mpshare=1&scene=1&srcid=1226pYPjHUCOMZmnq7FMGk86&sharer_shareinfo=ece2905c127436a9b5eae1003db433fd&sharer_shareinfo_first=0628f372cfaf61c028e18d6a8c508f50&exportkey=n_ChQIAhIQuA3e9zi0waukFDFCW1r%2ByhKfAgIE97dBBAEAAAAAAMFpCyDDdf4AAAAOpnltbLcz9gKNyK89dVj0uQI27swsOvYg368rEF3G9%2B72QxoOEAPAtRnBP0T8TmPbvTWYGbNG6ug7Za3ehBxruqhkk%2Bki%2BwUlj9NyGj7PzmMFO%2FJsij6UBGY3Vpgu3wKdrwe08W%2F0g4%2FAHVYW85it%2FEy104f1SNm0dtnV7sKSaTu8QbO%2FhqanrBe6n1u5q0B816ezwmh2m4RyMqxtUucoo0a2cOBvnIpfgO5pA%2F1KZ1naNd73ubHBMDQ2dU8E8SSQH2quniORgpyMqyOMK19GbsFh9Yh6xu1qsmX3iE5Ei%2F3G3JxxHvWaTR5uV5%2Fousn%2Fly4ctUTgA1mNvArHHHabEgtbFAVFrP5W&acctmode=0&pass_ticket=%2BHWz3yc2o8iZ6T2jkz0Pa27SKjP5Jc%2BuBoHv%2FE7tlB6avrF01Uh8JTBFsqDxKGA6&wx_header=0#rd

完整代码

using log4net;
using log4net.Config;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;namespace Emrys.FlashLog
{public sealed class FlashLogger{/// <summary>/// 记录消息Queue/// </summary>private readonly ConcurrentQueue<FlashLogMessage> _que;/// <summary>/// 信号/// </summary>private readonly ManualResetEvent _mre;/// <summary>/// 日志/// </summary>private readonly ILog _log;/// <summary>/// 日志/// </summary>private static FlashLogger _flashLog = new FlashLogger();private FlashLogger(){var configFile = new FileInfo(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "log4net.config"));if (!configFile.Exists){throw new Exception("未配置log4net配置文件！");}// 设置日志配置文件路径XmlConfigurator.Configure(configFile);_que = new ConcurrentQueue<FlashLogMessage>();_mre = new ManualResetEvent(false);_log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);}/// <summary>/// 实现单例/// </summary>/// <returns></returns>public static FlashLogger Instance(){return _flashLog;}/// <summary>/// 另一个线程记录日志，只在程序初始化时调用一次/// </summary>public void Register(){Thread t = new Thread(new ThreadStart(WriteLog));t.IsBackground = false;t.Start();}/// <summary>/// 从队列中写日志至磁盘/// </summary>private void WriteLog(){while (true){// 等待信号通知_mre.WaitOne();FlashLogMessage msg;// 判断是否有内容需要如磁盘 从列队中获取内容，并删除列队中的内容while (_que.Count > 0 && _que.TryDequeue(out msg)){// 判断日志等级，然后写日志switch (msg.Level){case FlashLogLevel.Debug:_log.Debug(msg.Message, msg.Exception);break;case FlashLogLevel.Info:_log.Info(msg.Message, msg.Exception);break;case FlashLogLevel.Error:_log.Error(msg.Message, msg.Exception);break;case FlashLogLevel.Warn:_log.Warn(msg.Message, msg.Exception);break;case FlashLogLevel.Fatal:_log.Fatal(msg.Message, msg.Exception);break;}}// 重新设置信号_mre.Reset();Thread.Sleep(1);}}/// <summary>/// 写日志/// </summary>/// <param name="message">日志文本</param>/// <param name="level">等级</param>/// <param name="ex">Exception</param>public void EnqueueMessage(string message, FlashLogLevel level, Exception ex = null){if ((level == FlashLogLevel.Debug && _log.IsDebugEnabled)|| (level == FlashLogLevel.Error && _log.IsErrorEnabled)|| (level == FlashLogLevel.Fatal && _log.IsFatalEnabled)|| (level == FlashLogLevel.Info && _log.IsInfoEnabled)|| (level == FlashLogLevel.Warn && _log.IsWarnEnabled)){_que.Enqueue(new FlashLogMessage{Message = "[" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss,fff") + "]\r\n" + message,Level = level,Exception = ex});// 通知线程往磁盘中写日志_mre.Set();}}public static void Debug(string msg, Exception ex = null){Instance().EnqueueMessage(msg, FlashLogLevel.Debug, ex);}public static void Error(string msg, Exception ex = null){Instance().EnqueueMessage(msg, FlashLogLevel.Error, ex);}public static void Fatal(string msg, Exception ex = null){Instance().EnqueueMessage(msg, FlashLogLevel.Fatal, ex);}public static void Info(string msg, Exception ex = null){Instance().EnqueueMessage(msg, FlashLogLevel.Info, ex);}public static void Warn(string msg, Exception ex = null){Instance().EnqueueMessage(msg, FlashLogLevel.Warn, ex);}}/// <summary>/// 日志等级/// </summary>public enum FlashLogLevel{Debug,Info,Error,Warn,Fatal}/// <summary>/// 日志内容/// </summary>public class FlashLogMessage{public string Message { get; set; }public FlashLogLevel Level { get; set; }public Exception Exception { get; set; }}
}

特此记录

anlog

2024年12月27日