88 lines
2.6 KiB
C#
88 lines
2.6 KiB
C#
using System;
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using System.Reflection;
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using System.Text;
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using DocumentFormat.OpenXml.Packaging;
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using log4net.Core;
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namespace Aitex.Core.RT.Log
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{
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/// <summary>
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/// 将日志信息写入磁盘的写入器对象。
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/// </summary>
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internal class LogWriter
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{
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#region Variables
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/// <summary>
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/// 时间字串和日志消息之间的缩进字符个数。
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/// </summary>
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private const int INTEND_DATE_AND_MSG = 4;
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private readonly ILogger _logger;
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#endregion
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#region Constructors
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/// <summary>
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/// 构造日志写入器对象的实例。
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/// </summary>
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public LogWriter()
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{
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_logger = LoggerManager.GetLogger(Assembly.GetExecutingAssembly(), "CommonLogger");
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}
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#endregion
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#region Methods
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/// <summary>
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/// 格式化日志字串。
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/// </summary>
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/// <param name="logItem">日志项目对象。</param>
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/// <returns></returns>
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private static string FormatLogString(LogItem logItem)
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{
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var sb = new StringBuilder();
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// 写入日志时间
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var datePart = $"{logItem.Time:yyyy-MM-dd HH:mm:ss.fff}{new string(' ', INTEND_DATE_AND_MSG)}";
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sb.Append(datePart);
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// 日志消息体缩进使用时间部分的字串长度，解决多行消息体换行后保持正确缩进的问题。
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var intend = datePart.Length;
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var msgLines = logItem.Message.Split(new string[] { "\r\n", "\n" }, StringSplitOptions.RemoveEmptyEntries);
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for (var i = 0; i < msgLines.Length; i++)
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{
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var line = msgLines[i].TrimEnd('\r', '\n');
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if(i == 0)
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// 第一条消息不要添加缩进
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sb.AppendLine(line);
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else if(i == msgLines.Length - 1)
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// 最后一条消息末尾不要添加换行
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sb.Append($"{new string(' ', intend)}{line}");
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else
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// 其它消息添加缩进和换行
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sb.AppendLine($"{new string(' ', intend)}{line}");
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}
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return sb.ToString().TrimEnd('\r', '\n');
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}
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/// <summary>
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/// 日志写入磁盘。
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/// </summary>
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/// <param name="logItem"></param>
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/// <returns></returns>
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public string Write(LogItem logItem)
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{
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var formattedLogString = FormatLogString(logItem);
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_logger.Log(typeof(LogWriter), logItem.Level, formattedLogString, logItem.Exception);
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return formattedLogString;
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}
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#endregion
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}
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}
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