using System;
using System.Data.SqlClient;
using System.Diagnostics;
using System.IO;
namespace CK.SCP.Utils
{
///
/// 日志类
///
public sealed class TraceLogger
{
#region Member Variables
///
/// 用于Trace的组织输出的类别名称
///
private const string trace_sql = "\r\n***********************TRACE_SQL {0}*****************************\r\nTRACE_SQL";
///
/// 用于Trace的组织输出的类别名称
///
private const string trace_exception = "\r\n***********************TRACE_EXCEPTION {0}***********************";
///
/// 当前日志的日期
///
private static DateTime CurrentLogFileDate = DateTime.Now;
///
/// 日志对象
///
private static TextWriterTraceListener twtl;
///
/// 日志根目录
///
private const string log_root_directory = @"//Logs";
///
/// 日志子目录
///
private static string log_subdir;
///
/// " {0} = {1}"
///
private const string FORMAT_TRACE_PARAM = " {0} = {1}";
///
/// 1 仅控制台输出
/// 2 仅日志输出
/// 3 控制台+日志输出
///
private static readonly int flag = 2; //可以修改成从配置文件读取
#endregion
#region Constructor
static TraceLogger()
{
System.Diagnostics.Trace.AutoFlush = true;
switch (flag)
{
case 1:
System.Diagnostics.Trace.Listeners.Add(new ConsoleTraceListener());
break;
case 2:
System.Diagnostics.Trace.Listeners.Add(TWTL);
break;
case 3:
System.Diagnostics.Trace.Listeners.Add(new ConsoleTraceListener());
System.Diagnostics.Trace.Listeners.Add(TWTL);
break;
}
}
#endregion
#region Method
#region trace
///
/// 异步错误日志
///
///
public static void Trace(Exception ex)
{
new AsyncLogException(BeginTraceError).BeginInvoke(ex, null, null);
}
///
/// 异步SQL日志
///
///
public static void Trace(SqlCommand cmd)
{
new AsyncLogSqlCommand(BeginTraceSqlCommand).BeginInvoke(cmd, null, null);
}
///
/// 异步SQL日志
///
///
///
public static void Trace(string sql, params SqlParameter[] parameter)
{
new AsyncLogSql(BeginTraceSql).BeginInvoke(sql, parameter, null, null);
}
#endregion
#region delegate
private delegate void AsyncLogException(Exception ex);
private delegate void AsyncLogSqlCommand(SqlCommand cmd);
private delegate void AsyncLogSql(string sql, params SqlParameter[] parameter);
private static void BeginTraceError(Exception ex)
{
if (null != ex)
{
//检测日志日期
StrategyLog();
//输出日志头
System.Diagnostics.Trace.WriteLine(string.Format(trace_exception, DateTime.Now));
while (null != ex)
{
System.Diagnostics.Trace.WriteLine(string.Format("{0} {1}\r\n{2}\r\nSource:{3}", ex.GetType().Name, ex.Message, ex.StackTrace, ex.Source));
ex = ex.InnerException;
}
}
}
private static void BeginTraceSqlCommand(SqlCommand cmd)
{
if (null != cmd)
{
SqlParameter[] parameter = new SqlParameter[cmd.Parameters.Count];
cmd.Parameters.CopyTo(parameter, 0);
BeginTraceSql(cmd.CommandText, parameter);
}
}
private static void BeginTraceSql(string sql, params SqlParameter[] parameter)
{
if (!string.IsNullOrEmpty(sql))
{
//检测日志日期
StrategyLog();
System.Diagnostics.Trace.WriteLine(sql, string.Format(trace_sql, DateTime.Now));
if (parameter != null)
{
foreach (SqlParameter param in parameter)
{
System.Diagnostics.Trace.WriteLine(string.Format(FORMAT_TRACE_PARAM, param.ParameterName, param.Value));
}
}
}
}
#endregion
#region helper
///
/// 根据日志策略生成日志
///
private static void StrategyLog()
{
//判断日志日期
if (DateTime.Compare(DateTime.Now.Date, CurrentLogFileDate.Date) != 0)
{
DateTime currentDate = DateTime.Now.Date;
//生成子目录
BuiderDir(currentDate);
//更新当前日志日期
CurrentLogFileDate = currentDate;
System.Diagnostics.Trace.Flush();
//更改输出
if (twtl != null)
System.Diagnostics.Trace.Listeners.Remove(twtl);
System.Diagnostics.Trace.Listeners.Add(TWTL);
}
}
///
/// 根据年月生成子目录
///
///
private static void BuiderDir(DateTime currentDate)
{
int year = currentDate.Year;
int month = currentDate.Month;
//年/月
string subdir = string.Concat(year, '\\', month);
string path = Path.Combine(log_root_directory, subdir);
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
log_subdir = subdir;
}
#endregion
#endregion
#region Properties
///
/// 日志文件路径
///
///
private static string GetLogFullPath
{
get
{
return string.Concat(log_root_directory, '\\', string.Concat(log_subdir, @"\log", CurrentLogFileDate.ToShortDateString(), ".txt"));
}
}
///
/// 跟踪输出日志文件
///
private static TextWriterTraceListener TWTL
{
get
{
if (twtl == null)
{
if (string.IsNullOrEmpty(log_subdir))
BuiderDir(DateTime.Now);
else
{
string logPath = GetLogFullPath;
if (!Directory.Exists(Path.GetDirectoryName(logPath)))
BuiderDir(DateTime.Now);
}
twtl = new TextWriterTraceListener(GetLogFullPath);
}
return twtl;
}
}
#endregion
}
}