一. 介绍
在一上篇中介绍了Exceptionless的基本使用,这篇主要讲Exceptionless结合Nlog的实现双重日志记录,包括Exceptionles的UI可视化日志以及Nlog的txt文件日志。再是从Apollo配置中心读取配置文件,当系统越庞大越多时,需要配置的参数也越来越多,可以通过使用Apollo配置中心来统一管理,例如:配置数据库连接地址、Exceptionless的对应项目的apikey值,redis连接地址等等所有可配置的参数。
1.1 asp.net core中Apollo配置
打开asp.net core 项目,删除appsettings.json文件默认内容,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配置对应的Apollo客户端配置中心如下,这里端口8070是Apollo客户端配置界面。端口8080是.net core程序读取Apollo配置地址。Apollo配置中参数都是以key-value的形式存储。
下面是读取Apollo配置文件的关键代码:
安装包如下:
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; ////// 获取Apollo的config /// /// public static IConfigurationRoot GetRoot() { if (_root != null) { return _root; } //先获取appsettings.json的配置 var config = new ConfigurationBuilder() .SetBasePath(Directory.GetCurrentDirectory()) .AddJsonFile("appsettings.json") .Build(); //连接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:如果变量configuration 中没有读取到Apollo参数值,可以从configuration 对象的参数中查找返回的异常信息。如果读取成功会缓存一份文件到本地,如下所示:
//下面是从Apollo(AppId:100001)的配置中心获取Key为“ApiKey”的value值: string apiKey = GetRoot().GetSection("ApiKey").Value;
关于Apollo更多资料,包括Apollo服务端部署,参考官方文档:https://github.com/ctripcorp/apollo
1.2 Nlog结合Exceptionles
安装包如下:
Install-Package Exceptionless.NLog
Install-Package NLog.Web.AspNetCore
在Nlog的基础上,结合Exceptionles,关键代码如下
(也可尝试通过配置文件实现 https://github.com/exceptionless/Exceptionless.Net/tree/master/src/Platforms/Exceptionless.NLog):
////// 返回Nlog.Logger /// /// public Logger GetExceptionlessLogger() { var config = new LoggingConfiguration(); var exceptionlessTarget = new ExceptionlessTarget(); //读取Apploo的Exceptionless配置参数 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} | ${message}"; exceptionlessTarget.Name = "exceptionless"; //添加exceptionless的Target对象 config.AddTarget("exceptionless", exceptionlessTarget); config.LoggingRules.Add(new LoggingRule("*", global::NLog.LogLevel.Error, exceptionlessTarget)); LogManager.Configuration = config; return LogManager.GetCurrentClassLogger(); } /// /// Nlog.Logger对象 /// private Logger _logger { get { return N.NLogBuilder.ConfigureNLog("Config\\NLog.config").GetCurrentClassLogger(); } } /// /// 带有Exceptionless的Nlog.Logger对象 /// private Logger _exceptionlessLogger { get { ExceptionlessHelper helper = new ExceptionlessHelper(); return helper.GetExceptionlessLogger(); } }
//记录错误日志 public void Error(IFormatProvider formatProvider, T value) { _logger.Error(formatProvider, value); _exceptionlessLogger.Error(formatProvider, value); }
二. Nlog结合Exceptionles代码优化
在1.2中介绍了二种日志的结合,下面把1.2的代码进行优化改造,主要包括:
(1) 去掉nlog的配置文件,使用编码来处理
(2) 记录日志时,只需要一个_logger.Error,就能同时记录到txt文件和exceptionless中。
////// Nlog.Logger对象 /// private Logger _logger { get { var config = new LoggingConfiguration();// N.NLogBuilder.ConfigureNLog("Config\\NLog.config"); //添加exceptionless日志文件 var exceptionlessTarget = GetExceptionlessTarget(); config.AddTarget("exceptionless", exceptionlessTarget); config.AddRule(LogLevel.Debug, LogLevel.Fatal, exceptionlessTarget); //添加txt日志文件 var logfile = new FileTarget("logfile") { FileName =string.Format(@"c:\temp\{0}.log",DateTime.Now.ToString("yyyy-MM-dd")) }; logfile.Layout = "${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(); } } /// /// 返回Nlog Target /// /// public static ExceptionlessTarget GetExceptionlessTarget() { var exceptionlessTarget = new ExceptionlessTarget(); //读取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; } //记录日志 public void Error(string message, Exception exception) { _logger.Error(exception, message); }
效果如下所示: