asp.net core系列 73 Exceptionless+Nlog以及Apollo介紹

  • 2019 年 10 月 3 日
  • 筆記

一. 介紹

  在一上篇中介紹了Exceptionless的基本使用,這篇主要講Exceptionless結合Nlog的實現雙重日誌記錄,包括ExceptionlesUI可視化日誌以及Nlogtxt文件日誌。再是從Apollo配置中心讀取配置文件,當系統越龐大越多時,需要配置的參數也越來越多,可以通過使用Apollo配置中心來統一管理,例如:配置數據庫連接地址、Exceptionless的對應項目的apikey值,redis連接地址等等所有可配置的參數。

 

  1.1 asp.net core中Apollo配置

    打開asp.net core 項目,刪除appsettings.json文件默認內容,在添加配置如下所示:

{    "apollo": {      "AppId": "100001",      "MetaServer": "http://192.168.0.100:8080/",      "Env": "Dev",      "Meta": {        "DEV": "http://192.168.0.100:8080/",        "FAT": "http://192.168.0.100:8080/",        "UAT": "http://192.168.0.100:8080/",        "PRO": "http://192.168.0.100:8080/"      }    }  }

    appsettings.json配置對應的Apollo客戶端配置中心如下,這裡端口8070是Apollo客戶端配置界面。端口8080是.net core程序讀取Apollo配置地址。Apollo配置中參數都是以key-value的形式存儲。

    下面是讀取Apollo配置文件的關鍵代碼:

      安裝包如下:

        Install-Package Microsoft.Extensions.Configuration -Version 2.2.0          Install-Package Com.Ctrip.Framework.Apollo.Configuration -Version 2.0.3

      private static IConfigurationRoot _root = null;            /// <summary>          /// 獲取Apollo的config          /// </summary>          /// <returns></returns>          public static IConfigurationRoot GetRoot()          {              if (_root != null)              {                  return _root;              }                //先獲取appsettings.json的配置              var config = new ConfigurationBuilder()               .SetBasePath(Directory.GetCurrentDirectory())               .AddJsonFile("appsettings.json")               .Build();                //連接Apollo              string appId = config.GetSection("apollo").GetSection("AppId").Value;              string metaServer = config.GetSection("apollo").GetSection("MetaServer").Value;              var  configuration = new ConfigurationBuilder()                  .AddApollo(appId, metaServer)                  // .AddDefault(ConfigFileFormat.Xml)                  // .AddDefault(ConfigFileFormat.Json)                  // .AddDefault(ConfigFileFormat.Yml)                  // .AddDefault(ConfigFileFormat.Yaml)                  .AddDefault().AddNamespace("application")                  .Build();              _root = configuration;              return _root;          }

    注意:如果變量configuration 中沒有讀取到Apollo參數值,可以從configuration 對象的參數中查找返回的異常信息。如果讀取成功會緩存一份文件到本地,如下所示:

      //下面是從Apollo(AppId:100001)的配置中心獲取Key為“ApiKey”的value值:         string apiKey = GetRoot().GetSection("ApiKey").Value; 

    關於Apollo更多資料,包括Apollo服務端部署,參考官方文檔:https://github.com/ctripcorp/apollo

 

  1.2 Nlog結合Exceptionles

    安裝包如下:

     Install-Package Exceptionless.NLog        Install-Package NLog.Web.AspNetCore

    在Nlog的基礎上,結合Exceptionles,關鍵代碼如下

      (也可嘗試通過配置文件實現 https://github.com/exceptionless/Exceptionless.Net/tree/master/src/Platforms/Exceptionless.NLog):

     /// <summary>          /// 返回Nlog.Logger          /// </summary>          /// <returns></returns>          public Logger GetExceptionlessLogger()          {              var config = new LoggingConfiguration();              var exceptionlessTarget = new ExceptionlessTarget();                //讀取Apploo的Exceptionless配置參數              string apiKey = ConfigHelper.GetRoot().GetSection("ApiKey").Value;              string serverUrl = ConfigHelper.GetRoot().GetSection("ServerUrl")?.Value;              exceptionlessTarget.ApiKey = apiKey;              exceptionlessTarget.ServerUrl = serverUrl;                exceptionlessTarget.Layout = "${longdate} |  ${callsite} |  ${level}  | ${message}";              exceptionlessTarget.Name = "exceptionless";              //添加exceptionless的Target對象              config.AddTarget("exceptionless", exceptionlessTarget);              config.LoggingRules.Add(new LoggingRule("*", global::NLog.LogLevel.Error, exceptionlessTarget));              LogManager.Configuration = config;              return LogManager.GetCurrentClassLogger();       }              /// <summary>          /// Nlog.Logger對象          /// </summary>          private Logger _logger          {              get              {                  return  N.NLogBuilder.ConfigureNLog("Config\NLog.config").GetCurrentClassLogger();              }          }            /// <summary>          /// 帶有Exceptionless的Nlog.Logger對象          /// </summary>          private Logger _exceptionlessLogger          {              get              {                  ExceptionlessHelper helper = new ExceptionlessHelper();                  return helper.GetExceptionlessLogger();              }          }

     //記錄錯誤日誌        public void Error<T>(IFormatProvider formatProvider, T value)          {              _logger.Error(formatProvider, value);              _exceptionlessLogger.Error(formatProvider, value);          } 

 

二. Nlog結合Exceptionles代碼優化

  在1.2中介紹了二種日誌的結合,下面把1.2的代碼進行優化改造,主要包括:

    (1) 去掉nlog的配置文件,使用編碼來處理

    (2) 記錄日誌時,只需要一個_logger.Error,就能同時記錄到txt文件和exceptionless中。

        /// <summary>          /// Nlog.Logger對象          /// </summary>          private Logger _logger          {              get              {                  var config = new LoggingConfiguration();// N.NLogBuilder.ConfigureNLog("Config\NLog.config");                  //添加exceptionless日誌文件                  var exceptionlessTarget = GetExceptionlessTarget();                  config.AddTarget("exceptionless", exceptionlessTarget);                  config.AddRule(LogLevel.Debug, LogLevel.Fatal, exceptionlessTarget);                    //添加txt日誌文件                  var logfile = new FileTarget("logfile") { FileName =string.Format(@"c:temp{0}.log",DateTime.Now.ToString("yyyy-MM-dd")) };                  logfile.Layout = "${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}|${callsite}";                  config.AddRule(LogLevel.Debug, LogLevel.Fatal, logfile);                    LogManager.Configuration = config;                  return LogManager.GetCurrentClassLogger();              }          }            /// <summary>          /// 返回Nlog Target          /// </summary>          /// <returns></returns>          public static ExceptionlessTarget GetExceptionlessTarget()          {              var exceptionlessTarget = new ExceptionlessTarget();              //讀取Apploo配置的Exceptionless地址              string apiKey = ConfigHelper.GetRoot().GetSection("ApiKey").Value;              string serverUrl = ConfigHelper.GetRoot().GetSection("ServerUrl")?.Value;              exceptionlessTarget.ApiKey = apiKey;              exceptionlessTarget.ServerUrl = serverUrl;              exceptionlessTarget.Layout = "${longdate} |  ${callsite} |  ${level}  | ${message}";              exceptionlessTarget.Name = "exceptionless";              return exceptionlessTarget;          }            //記錄日誌          public void Error(string message, Exception exception)          {              _logger.Error(exception, message);          }

  效果如下所示: