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C#实现线程安全的简易日志记录方法

2014-08-04 16:20 1471 查看

一般在实际项目的开发中，会要求涉及日志记录的问题，比较常用的有Log4Net，NLog等几个，而小项目小工具的话，则无需费此大驾。而譬如串口开发的话，需要记录串口过来的数据等等，这时候就要考虑日志记录上线程的问题。对此，为了方便后续使用，封装了下代码：

using System;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Threading;
namespace CSharpUtilHelpV2
{
/// <summary>
/// 日志类型枚举
/// </summary>
public enum LogType
{
/// <summary>
/// 一般输出
/// </summary>
Trace,
/// <summary>
/// 警告
/// </summary>
Warning,
/// <summary>
/// 错误
/// </summary>
Error,
/// <summary>
/// SQL
/// </summary>
SQL
}
/// <summary>
/// 基于.NET 2.0日志工具类
/// </summary>
public class LogToolV2
{
private static readonly Thread LogTask;
private static readonly ThreadSafeQueueV2<string> LogColQueue;//自定义线程安全的Queue
private static readonly object SyncRoot;
private static readonly string FilePath;
private static readonly long BackFileSize_MB = 2;//超过2M就开始备份日志文件
static LogToolV2()
{
SyncRoot = new object();
FilePath = AppDomain.CurrentDomain.SetupInformation.ApplicationBase + "Log\\";
LogTask = new Thread(WriteLog);
LogColQueue = new ThreadSafeQueueV2<string>();
LogTask.Start();
Debug.WriteLine("Log Start......");
}
/// <summary>
/// 记录日志
/// </summary>
/// <param name="msg">日志内容</param>
public static void Log(string msg)
{
string _msg = string.Format("{0} : {2}", DateTime.Now.ToString("HH:mm:ss"), msg);
LogColQueue.Enqueue(msg);
}
/// <summary>
/// 记录日志
/// </summary>
/// <param name="msg">日志内容</param>
/// <param name="type">日志类型</param>
public static void Log(string msg, LogType type)
{
string _msg = string.Format("{0} {1}: {2}", DateTime.Now.ToString("HH:mm:ss"), type, msg);
LogColQueue.Enqueue(_msg);
}
/// <summary>
/// 记录日志
/// </summary>
/// <param name="ex">异常</param>
public static void Log(Exception ex)
{
if (ex != null)
{
string _newLine = Environment.NewLine;
StringBuilder _builder = new StringBuilder();
_builder.AppendFormat("{0}: {1}{2}", DateTime.Now.ToString("HH:mm:ss"), ex.Message, _newLine);
_builder.AppendFormat("{0}{1}", ex.GetType(), _newLine);
_builder.AppendFormat("{0}{1}", ex.Source, _newLine);
_builder.AppendFormat("{0}{1}", ex.TargetSite, _newLine);
_builder.AppendFormat("{0}{1}", ex.StackTrace, _newLine);
LogColQueue.Enqueue(_builder.ToString());
}
}
private static void WriteLog()
{
while (true)
{
if (LogColQueue.Count() > 0)
{
string _msg = LogColQueue.Dequeue();
Monitor.Enter(SyncRoot);
if (!CreateDirectory()) continue;
string _path = string.Format("{0}{1}.log", FilePath, DateTime.Now.ToString("yyyyMMdd"));
Monitor.Exit(SyncRoot);
lock (SyncRoot)
{
if (CreateFile(_path))
ProcessWriteLog(_path, _msg);//写入日志到文本
}
ProcessBackLog(_path);//日志备份
}
}
}
private static void ProcessBackLog(string path)
{
lock (SyncRoot)
{
if (FileToolV2.GetMBSize(path) > BackFileSize_MB)
{
FileToolV2.CopyToBak(path);
}
}
}
private static void ProcessWriteLog(string path, string msg)
{
try
{
StreamWriter _sw = File.AppendText(path);
_sw.WriteLine(msg);
_sw.Flush();
_sw.Close();
}
catch (Exception ex)
{
Debug.WriteLine(string.Format("写入日志失败，原因:{0}", ex.Message));
}
}
private static bool CreateFile(string path)
{
bool _result = true;
try
{
if (!File.Exists(path))
{
FileStream _files = File.Create(path);
_files.Close();
}
}
catch (Exception)
{
_result = false;
}
return _result;
}
private static bool CreateDirectory()
{
bool _result = true;
try
{
if (!Directory.Exists(FilePath))
{
Directory.CreateDirectory(FilePath);
}
}
catch (Exception)
{
_result = false;
}
return _result;
}
}
}

测试代码如下：

using CSharpUtilHelpV2;
using System;
using System.Diagnostics;
using System.Threading;
namespace LogUtilHelpV2Test
{
class Program
{
static void Main(string[] args)
{
try
{
Debug.WriteLine("-------------");
Action _writeLog = delegate()
{
for (int i = 0; i < 10000; i++)
LogToolV2.Log(Guid.NewGuid().ToString(), LogType.Trace);
};
Thread _wireteLogTask1 = new Thread(new ThreadStart(_writeLog));
_wireteLogTask1.Start();
Thread _wireteLogTask2 = new Thread(new ThreadStart(_writeLog));
_wireteLogTask2.Start();
//throw new Exception("test  aaa bb cc");
}
catch (Exception ex)
{
LogToolV2.Log(ex);
Console.WriteLine(ex.Message.Trim());
}
finally
{
Console.WriteLine("ok");
Console.ReadLine();
}
}
}
}

代码运行效果如下所示：

感兴趣的读者可以自己测试运行一下，希望能对大家起到一点帮助！

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