磨刀不误砍柴工——统一日志系统 Log4Net/Except…

2018-06-22 07:44:25来源：未知阅读 ()

本文版权归博客园和作者吴双本人共同所有，转载和爬虫必须注明原文地址:www.cnblogs.com/tdws 。

一. 写在前面

本文Log4Net介绍了基础的方式，大数据量生产环境不能使用，中等日志量请日志单库。希望爱技术的你不要错过exceptionless和ELK

第四节开始简单配置大牛们推荐的了ExceptionLess, 一款开源分布式日志系统。

日志系统对于任何项目都是必不可少的，无论对于测试阶段的debug,性能测试，执行时间，操作记录还是线上的问题排查，访问记录等，日志系统都扮演着重要的角色。本篇分享的目的是能帮助需要的人快速搭建自己的LogSystem.，仅供参考。先上个图呗，自认为页面还算清爽吧：

我的LogSystem使用Log4net入库的方式，网上特别多的分享，但是能完整运行下来的真是很少，所以现在需要和以后用得上的小伙伴抓紧收藏咯。

二. Log4Net自定义内容入库

Log4Net存日志的方式，给人的感觉实在是不实用，IT行业不都求一个自动化吗？废话不说了，先上Log4net入库系统的代码。

LogSystem数据库结构，我的建议是一个项目一个表。

在Log组件中，你需要这样几个类。下面分别给出代码：

LogContent.cs，这里定义了Log实体，在实体化实体的时候，通过给构造函数传参创建好这个对象。注释很详细了

 1 using System;
 2 
 3 namespace LogComponent
 4 {
 5     public class LogContent
 6     {
 7 
 8         public LogContent(string logLevel, string logMsg, string logModule, string description, string userName)
 9         {
10             LogLevel = logLevel;
11             UserName = userName;
12             Description = description;
13             LogMsg = logMsg;
14             LogModule = logModule;
15         }
16 
17         /// <summary>
18         /// 日志级别
19         /// </summary>
20         public string LogLevel { get; set; }
21 
22         /// <summary>
23         /// 日志消息
24         /// </summary>
25         public string LogMsg { get; set; }
26 
27         /// <summary>
28         /// 系统登陆用户
29         /// </summary>
30         public string UserName { get; set; }
31 
32         /// <summary>
33         /// 日志描述信息
34         /// </summary>
35         public string Description { get; set; }
36 
37         /// <summary>
38         /// 记录时间
39         /// </summary>
40         public DateTime LogDate { get; set; }
41 
42         /// <summary>
43         /// 模块名称
44         /// </summary>
45         public string LogModule { get; set; }
46     }
47 }

View Code

LogHelper.cs,定义了日志级别，和写入方法

 1 [assembly: log4net.Config.XmlConfigurator(Watch = true,ConfigFile = "log4net.config")]
 2 namespace LogComponent
 3 {
 4     public class LogHelper
 5     {
 6         static log4net.ILog log = log4net.LogManager.GetLogger("myLogger");
 7 
 8         /// <summary>
 9         /// 异常日志
10         /// </summary>
11         /// <param name="logMsg">日志信息</param>
12         /// <param name="logModule">代码模块</param>
13         /// <param name="description">其他描述</param>
14         /// <param name="userName">用户名</param>
15         public static void LogError(string logMsg, string logModule, string description = "", string userName = "")
16         {
17             log.Error(new LogContent("Error", SubLogString(logMsg), logModule, SubLogString(description), userName));
18         }
19 
20         public static void LogInfo(string logMsg, string logModule, string description = "", string userName = "")
21         {
22             log.Info(new LogContent("Info", SubLogString(logMsg), logModule, SubLogString(description), userName));
23         }
24 
25         public static void LogWarn(string logMsg, string logModule, string description = "", string userName = "")
26         {
27             log.Warn(new LogContent("Warn", SubLogString(logMsg), logModule, SubLogString(description), userName));
28         }
29 
30         public static void LogDebug(string logMsg, string logModule, string description = "", string userName = "")
31         {
32             log.Debug(new LogContent("Debug", SubLogString(logMsg), logModule, SubLogString(description), userName));
33         }
34 
35         private static string SubLogString(string str)
36         {
37             if (str.Length > 1500)
38             {
39                 return str.Substring(0, 1500);
40             }
41             return str;
42         }
43     }
44 }

View Code

MessagePartternConverter.cs

 1 using log4net.Core;
 2 using log4net.Layout.Pattern;
 3 using System.IO;
 4 using System.Reflection;
 5 namespace LogComponent
 6 {
 7     class MessagePatternConverter : PatternLayoutConverter
 8     {
 9         protected override void Convert(TextWriter writer, LoggingEvent loggingEvent)
10         {
11             if (Option != null)
12             {
13                 // Write the value for the specified key
14                 WriteObject(writer, loggingEvent.Repository, LookupProperty(Option, loggingEvent));
15             }
16             else
17             {
18                 // Write all the key value pairs
19                 WriteDictionary(writer, loggingEvent.Repository, loggingEvent.GetProperties());
20             }
21         }
22         /// <summary>
23         /// 通过反射获取传入的日志对象的某个属性的值
24         /// </summary>
25         /// <param name="property"></param>
26         /// <returns></returns>
27         private object LookupProperty(string property, log4net.Core.LoggingEvent loggingEvent)
28         {
29             object propertyValue = string.Empty;
30             PropertyInfo propertyInfo = loggingEvent.MessageObject.GetType().GetProperty(property);
31             if (propertyInfo != null)
32                 propertyValue = propertyInfo.GetValue(loggingEvent.MessageObject, null);
33             return propertyValue;
34         }
35     }
36 }

View Code

MyLayout.cs

 1 using log4net.Layout;
 2 namespace LogComponent
 3 {
 4     class MyLayout : PatternLayout
 5     {
 6         public MyLayout()
 7         {
 8             this.AddConverter("property", typeof(MessagePatternConverter));
 9         }
10     }
11 }

View Code

其实看到这里，最重要的并不是代码了，核心部分Log4net都帮我们写好了，关键在于你的配置，下面是log4net.config的内容。拿到你的web项目里是一样用的。但是不要忘了在你的项目中引用nuget：log4net哟。

log4net.config如下：在其中主要配置了log入库的参数和sql语句，当然还有sql连接。注释已经很详细了

 1 <?xml version="1.0" encoding="utf-8" ?>
 2 <configuration>
 3   <configSections>
 4     <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
 5   </configSections>
 6   <log4net>
 7     <root >
 8       <level value="Debug"/>
 9       <appender-ref ref="ADONetAppender"/>
10     </root>
11     <logger name="myLogger">
12       <level value="Debug"/>
13       <appender-ref ref="ADONetAppender"/>
14     </logger>
15     <appender name="ADONetAppender" type="log4net.Appender.ADONetAppender,log4net">
16       <!--BufferSize为缓冲区大小，只有日志记录超value条才会一块写入到数据库-->
17       <bufferSize value="1"/>
18       <!--或写为<param name="BufferSize" value="1" />-->
19       <!--引用-->
20       <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
21       <!--连接数据库字符串-->
22       <connectionString value="Data Source=115.29.54.31;Initial Catalog=LogSystem;uid=sa;pwd=sa.;MultipleActiveResultSets=True"/>
23       <!--插入到表Log-->
24       <commandText value="INSERT INTO HdPubLog ([LogDate],[LogMsg],[UserName],[Description],[LogLevel],[LogModule]) VALUES (@log_date,@LogMsg,@UserName,@Description,@LogLevel,@LogModule)"/>
25       <parameter>
26         <parameterName value="@log_date"/>
27         <dbType value="DateTime"/>
28         <layout type="log4net.Layout.RawTimeStampLayout"/>
29         <!--获取log4net中提供的日志时间RawTimeStampLayout为默认的时间输出格式-->
30       </parameter>
31       <parameter>
32         <parameterName value="@LogMsg"/>
33         <dbType value="String"/>
34         <size value="1510"/>
35         <layout type="LogComponent.MyLayout, LogComponent">
36           <param name="ConversionPattern" value="%property{LogMsg}"/>
37         </layout>
38       </parameter>
39       <parameter>
40         <parameterName value="@UserName"/>
41         <dbType value="String"/>
42         <size value="50"/>
43         <layout type="LogComponent.MyLayout, LogComponent">
44           <param name="ConversionPattern" value="%property{UserName}"/>
45         </layout>
46       </parameter>
47       <parameter>
48         <parameterName value="@Description"/>
49         <dbType value="String"/>
50         <size value="1510"/>
51         <layout type="LogComponent.MyLayout, LogComponent">
52           <param name="ConversionPattern" value="%property{Description}"/>
53         </layout>
54       </parameter>
55       <parameter>
56         <parameterName value="@LogLevel"/>
57         <dbType value="String"/>
58         <size value="50"/>
59         <layout type="LogComponent.MyLayout, LogComponent">
60           <param name="ConversionPattern" value="%property{LogLevel}"/>
61         </layout>
62       </parameter>
63       <parameter>
64         <parameterName value="@LogModule"/>
65         <dbType value="String"/>
66         <size value="50"/>
67         <layout type="LogComponent.MyLayout, LogComponent">
68           <param name="ConversionPattern" value="%property{LogModule}"/>
69         </layout>
70       </parameter>
71     </appender>
72   </log4net>
73 </configuration>

View Code

这样一来，你的配置就完成了，你可以直接测试插入的情况：

三. 把Log信息可视化

我的UI使用的是Datatables.js，弹出框是layer,日期组件好像是layDate，下拉框是修改样式后的select2。UI代码是我自己的一个框架里的，内容太多就不贴出来了，你只需要和以前一样，把数据从库里查出来，绑定给任意你喜欢的数据表格上。由于单页面的日志系统没有什么复杂操作，就用个sqlHelper查一下就算了，代码和条件拼接如下

  1 public class xxxDal
  2     {
  3         private SqlHelper _sqlHelper = new SqlHelper();
  4 
  5         /// <summary>
  6         /// 获取xxx的日志
  7         /// </summary>
  8         /// <param name="model"></param>
  9         /// <returns></returns>
 10         public List<LogModel> GetxxxLog(SM_LogModel model)
 11         {
 12             StringBuilder sql = new StringBuilder();
 13             List<SqlParameter> sqlParameters = new List<SqlParameter>();
 14             StringBuilder sqlWhere = new StringBuilder();
 15             if (!string.IsNullOrWhiteSpace(model.LogStartTime))
 16             {
 17                 sqlParameters.Add(new SqlParameter("@LogStartTime", model.LogStartTime));
 18                 sqlWhere.Append(@" AND h.LogDate > @LogStartTime");
 19             }
 20             if (!string.IsNullOrWhiteSpace(model.LogEndTime))
 21             {
 22                 sqlParameters.Add(new SqlParameter("@LogEndTime", model.LogEndTime));
 23                 sqlWhere.Append(@"  AND h.LogDate < @LogEndTime");
 24             }
 25             if (!string.IsNullOrWhiteSpace(model.LogLevel))
 26             {
 27                 sqlParameters.Add(new SqlParameter("@LogLevel", model.LogLevel));
 28                 sqlWhere.Append(@" AND h.LogLevel = @LogLevel");
 29             }
 30             if (!string.IsNullOrWhiteSpace(model.LogModule))
 31             {
 32                 sqlParameters.Add(new SqlParameter("@LogModule", model.LogModule));
 33                 sqlWhere.Append(@" AND h.LogModule = @LogModule");
 34             }
 35             sql.AppendFormat(@"
 36                     WITH    t AS ( SELECT   ROW_NUMBER() OVER ( ORDER BY id DESC ) AS IndexNum ,
 37                         [Id] ,
 38                         CONVERT(VARCHAR, [LogDate], 21) AS [LogDate] ,
 39                         [UserName] ,
 40                         SUBSTRING([Description], 0, 150) AS [Description] ,
 41                         SUBSTRING([LogMsg], 0, 200) AS [LogMsg] ,
 42                         [LogLevel] ,
 43                         [LogModule]
 44                FROM     [LogSystem].[dbo].[xxxLog] h
 45                WHERE    1 = 1
 46                        {0}
 47              )
 48     SELECT  *
 49     FROM    t
 50     WHERE   IndexNum > @startIndex
 51             AND indexnum < @endIndex", sqlWhere);
 52             sqlParameters.Add(new SqlParameter("@startIndex", model.Start));
 53             sqlParameters.Add(new SqlParameter("@endIndex", model.Start + model.Length));
 54 
 55             DataTable dt = _sqlHelper.ExecuteDataTable(sql.ToString(), sqlParameters.ToArray());
 56             return DataTableTools<LogModel>.DataTableToList(dt);
 57         }
 58 
 59         public int GetxxxLogTotalCount(SM_LogModel model)
 60         {
 61             StringBuilder sql = new StringBuilder(); List<SqlParameter> sqlParameters = new List<SqlParameter>();
 62             sql.Append(@"
 63                     SELECT  COUNT(*)
 64                     FROM    [HdPubLog] h where 1=1 ");
 65             if (!string.IsNullOrWhiteSpace(model.LogStartTime))
 66             {
 67                 sqlParameters.Add(new SqlParameter("@LogStartTime", model.LogStartTime));
 68                 sql.Append(@" AND h.LogDate > @LogStartTime");
 69             }
 70             if (!string.IsNullOrWhiteSpace(model.LogEndTime))
 71             {
 72                 sqlParameters.Add(new SqlParameter("@LogEndTime", model.LogEndTime));
 73                 sql.Append(@" AND h.LogDate < @LogEndTime");
 74             }
 75             if (!string.IsNullOrWhiteSpace(model.LogLevel))
 76             {
 77                 sqlParameters.Add(new SqlParameter("@LogLevel", model.LogLevel));
 78                 sql.Append(@" AND h.LogLevel = @LogLevel");
 79             }
 80             if (!string.IsNullOrWhiteSpace(model.LogModule))
 81             {
 82                 sqlParameters.Add(new SqlParameter("@LogModule", model.LogModule));
 83                 sql.Append(@" AND h.LogModule = @LogModule");
 84             }
 85             return _sqlHelper.ExecuteScalar<int>(sql.ToString(), sqlParameters.ToArray());
 86         }
 87 
 88         [HttpPost]
 89         public LogModel GetxxxxSignelLog(int id)
 90         {
 91             string sql = @"
 92                     SELECT  [Id] ,
 93                             CONVERT(VARCHAR(30), [LogDate], 21) AS [LogDate] ,
 94                             [UserName] ,
 95                             [Description] ,
 96                             [LogMsg] ,
 97                             [LogLevel] ,
 98                             [LogModule] ,
 99                             [Id] IndexNum 
100                     FROM    [LogSystem].[dbo].[xxxxLog] h
101                     WHERE   h.id = @Id";
102             var row = _sqlHelper.ExecuteDataRow(sql, new SqlParameter("@Id", id));
103             return DataTableTools<LogModel>.DataRowToModel(row);
104         }
105     }