/*
 * 异步日志类
 * 
 * 
 * */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Data.SqlClient;
using System.IO;

namespace Lib.Common.Common
{
    public sealed class AsynLogManager
    {
        #region Member Variables

        /// <summary>
        /// 用于Trace的组织输出的类别名称
        /// </summary>
        private const string trace_sql = "\r\n***********************TRACE_SQL {0}*****************************\r\nTRACE_SQL";

        /// <summary>
        /// 用于Trace的组织输出的类别名称
        /// </summary>
        private const string trace_exception = "\r\n***********************TRACE_EXCEPTION {0}***********************";

        /// <summary>
        /// 当前日志的日期
        /// </summary>
        private static DateTime CurrentLogFileDate = DateTime.Now;

        /// <summary>
        /// 日志对象
        /// </summary>
        private static TextWriterTraceListener  twtl=new TextWriterTraceListener();

        /// <summary>
        /// 日志根目录
        /// </summary>
        private static string log_root_directory =AppDomain.CurrentDomain.BaseDirectory; //@"D:\log";

        /// <summary>
        /// 日志子目录
        /// </summary>
        private static string log_subdir;


        /// <summary>
        /// "      {0} = {1}"
        /// </summary>
        private const string FORMAT_TRACE_PARAM = "      {0} = {1}";

        /// <summary>
        /// 1   仅控制台输出
        /// 2   仅日志输出
        /// 3   控制台+日志输出
        /// </summary>
        private static readonly int flag = 2;         //可以修改成从配置文件读取

        #endregion

        #region Constructor

        static AsynLogManager()
        {
            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

        /// <summary>
        /// 异步错误日志
        /// </summary>
        /// <param name="value"></param>
        public static void Trace(Exception ex)
        {
            new AsyncLogException(BeginTraceError).BeginInvoke(ex, null, null);
        }

        /// <summary>
        /// 异步SQL日志
        /// </summary>
        /// <param name="cmd"></param>
        public static void Trace(SqlCommand cmd)
        {
            new AsyncLogSqlCommand(BeginTraceSqlCommand).BeginInvoke(cmd, null, null);
        }

        /// <summary>
        /// 异步SQL日志
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="parameter"></param>
        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 BeginTraceErro