using System;

using System.Collections.Generic;

using System.IO;

using System.Text;

namespace itsvse.demo

{

/// <summary>

/// 日誌類

/// </summary>

/// <remarks>

/// 當呼叫Write方法時不會造成執行緒阻塞,而是立即完成方法呼叫,因此呼叫執行緒不用等待日誌寫入檔案之後才返回。

/// </remarks>

public class Logger

{

public static void Write(string msgText)

{

Write(DateTime.Now, MsgType.Information, "", msgText);

}

/// <summary>

/// 寫日誌基礎方法

/// </summary>

/// <param name="msgDataTime"></param>

/// <param name="msgType"></param>

/// <param name="msglocatio{過濾}n"></param>

/// <param name="msgText"></param>

private static void Write(DateTime msgDataTime, MsgType msgType, string msglocatio{過濾}n, string msgText)

{

QueueManager qm = new QueueManager();

qm.WriteToQueue(msgDataTime, msgType, msglocatio{過濾}n, msgText);

}

#region QueueManager

/// <summary>

/// 企業應用框架的日誌類

/// </summary>

private class QueueManager : IDisposable

{

/// <summary>

/// 日誌物件的快取佇列

/// </summary>

private static Queue<Msg> _msgsQueue;

/// <summary>

/// 日誌檔案儲存的路徑

/// </summary>

private static readonly string Path = BasePath + "\\AppLogs\";

/// <summary>

/// Web和WinForm通用的取當前根目錄的方法

/// </summary>

private static string BasePath

{

get

{

if (System.Web.HttpContext.Current != null)

return System.Web.HttpContext.Current.Server.MapPath("~/").TrimEnd(new char[] { "\\" });

else //當控制元件在定時器的觸發程式中使用時就為空

{

return AppDomain.CurrentDomain.BaseDirectory.TrimEnd(new char[] { "\\" });

}

//return AppDomain.CurrentDomain.BaseDirectory.TrimEnd(new char[] { "\\" });

}

}

/// <summary>

/// 日誌寫入檔案執行緒的控制標記,true為正在寫入

/// </summary>

private static bool _state = false;

/// <summary>

/// 日誌檔案生命週期的時間標記

/// </summary>

private static DateTime _timeSign;

/// <summary>

/// 日誌檔案寫入流物件

/// </summary>

private static StreamWriter _writer;

private delegate void WorkDelegate();

private static WorkDelegate _workDg;

/// <summary>

/// 初始化

/// </summary>

public QueueManager()

{

if (_msgsQueue == null)

{

if (!Directory.Exists(Path))

Directory.CreateDirectory(Path);

_msgsQueue = new Queue<Msg>();

_workDg = new WorkDelegate(Work);

}

}

/// <summary>

/// 寫入新日誌，根據指定的日誌物件Msg

/// </summary>

/// <param name="msg">日誌內容物件</param>

private void WriteToQueue(Msg msg)

{

if (msg != null)

{

lock (_msgsQueue)

{

_msgsQueue.Enqueue(msg);

}

}

if (_msgsQueue.Count > 0 && !_state)

{

_state = true;

_workDg.BeginInvoke(null, null);

}

}

/// <summary>

/// 日誌寫入檔案執行緒執行的方法,消費者

/// </summary>

private void Work()

{

//判斷佇列中是否存在待寫入的日誌

while (_msgsQueue.Count > 0)

{

Msg msg = null;

lock (_msgsQueue)

{

msg = _msgsQueue.Dequeue();

}

if (msg != null)

{

WriteToFile(msg);

}

}

_state = false;

FileClose();

}

/// <summary>

/// 透過判斷檔案的到期時間標記將決定是否建立新檔案。

/// </summary>

/// <returns></returns>

private static string GetFilename()

{

DateTime now = DateTime.Now;

string format = "yyyy-MM-dd".log"";

_timeSign = new DateTime(now.Year, now.Month, now.Day);

_timeSign = _timeSign.AddDays(1);

return now.ToString(format);

}

/// <summary>

/// 寫入日誌文字到檔案的方法

/// </summary>

/// <param name="msg"></param>

private void WriteToFile(Msg msg)

{

try

{

if (_writer == null)

{

FileOpen();

}

//判斷檔案到期標誌，如果當前檔案到期則關閉當前檔案建立新的日誌檔案

if (DateTime.Now >= _timeSign)

{

FileClose();

FileOpen();

}

if (_writer != null)

{

_writer.WriteLine(string.Format("{0}", msg.Datetime) + "\t" + msg.Type + "\t" + msg.locatio{過濾}n + "\t" + msg.Text);

_writer.Flush();

}

}

catch (Exception e)

{

Console.Out.Write(e);

}

}

//開啟檔案準備寫入

private void FileOpen()

{

_writer = new StreamWriter(Path + GetFilename(), true, Encoding.UTF8);

}

//關閉開啟的日誌檔案

private void FileClose()

{

if (_writer != null)

{

_writer.Flush();

_writer.Close();

_writer.Dispose();

_writer = null;

}

}

/// <summary>

/// 寫入新日誌，根據指定的日誌時間、日誌內容和資訊型別寫入新日誌

/// </summary>

/// <param name="msgDataTime"></param>

/// <param name="msgType"></param>

/// <param name="msglocatio{過濾}n"></param>

/// <param name="msgText"></param>

public void WriteToQueue(DateTime msgDataTime, MsgType msgType, string msglocatio{過濾}n, string msgText)

{

WriteToQueue(new Msg(msgDataTime, msgType, msglocatio{過濾}n, msgText));

}

#region IDisposable 成員

/// <summary>

/// 銷燬日誌物件

/// </summary>

public void Dispose()

{

_state = false;

}

#endregion

#endregion

#region Msg

/// <summary>

/// 表示一個日誌記錄的物件

/// </summary>

private class Msg

{

//日誌記錄的時間

//日誌記錄的型別

//日誌記錄的內容

/// <summary>

/// 建立新的日誌記錄例項;

/// </summary>

/// <param name="msgDataTime"></param>

/// <param name="msgType"></param>

/// <param name="msglocatio{過濾}n"></param>

/// <param name="msgText"></param>

public Msg(DateTime msgDataTime, MsgType msgType, string msglocatio{過濾}n, string msgText)

{

Datetime = msgDataTime;

Type = msgType;

locatio{過濾}n = msglocatio{過濾}n;

Text = msgText;

}

/// <summary>

/// 獲取或設定日誌記錄的時間

/// </summary>

public DateTime Datetime { get; private set; }

public string locatio{過濾}n { get; private set; }

/// <summary>

/// 獲取或設定日誌記錄的訊息型別

/// </summary>

public MsgType Type { get; private set; }

/// <summary>

/// 獲取或設定日誌記錄的文字內容

/// </summary>

public string Text { get; private set; }

}

}

#endregion

#region MsgType

/// <summary>

/// 日誌訊息型別的列舉

/// </summary>

public enum MsgType

{

/// <summary>

/// 普通訊息型別的日誌記錄

/// </summary>

Information,

/// <summary>

/// 警告資訊型別的日誌記錄

/// </summary>

Warning,

/// <summary>

/// 錯誤資訊型別的日誌記錄

/// </summary>

Error,

/// <summary>

/// 成功資訊型別的日誌記錄

/// </summary>

Success,

/// <summary>

/// 致命型別的日誌記錄

/// </summary>

Fatal

}

#endregion

}

}