自定义日志模型

本文示例源码： https://github.com/liangshiw/LogDashboard/tree/develop/samples/DatabaseSource​
日志模型
LogDashboard提供了基础的日志模型，包含以下5个属性，代表着只有包含以下5个属性的日志才可以被LogDashboard解析
LongDate
Logger
Level
Message
Exception
除了以上5个预定义属性外，我们还可以自定义属性
创建NetCore项目
参考快速入门中的创建NetCore项目步骤
使用以下 Nlog.config
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<?xml version="1.0" encoding="utf-8" ?>
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<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
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      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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      autoReload="true"
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      throwExceptions="false"
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      internalLogLevel="Off" internalLogFile="c:\temp\nlog-internal.log">
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​
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  <!-- optional, add some variables
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  https://github.com/nlog/NLog/wiki/Configuration-file#variables
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  -->
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  <variable name="myvar" value="myvalue"/>
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​
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  <!--
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  See https://github.com/nlog/nlog/wiki/Configuration-file
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  for information on customizing logging rules and outputs.
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   -->
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  <targets>
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​
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    <target xsi:type="file" name="File" fileName="${basedir}/logs/${shortdate}.log"
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            layout="${longdate}||${level}||${logger}||${message}||${exception:format=ToString:innerFormat=ToString:maxInnerExceptionLevel=10:separator=\r\n}||${var:application}||${var:requestMethod}||${machinename}||end" />
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    <!--
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    Write events to a file with the date in the filename.
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​
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    -->
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  </targets>
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​
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  <rules>
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    <logger name="*" minlevel="Error" writeTo="file" />
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    <!-- add your logging rules here -->
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​
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    <!--
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    Write all events with minimal level of Debug (So Debug, Info, Warn, Error and Fatal, but not Trace)  to "f"
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    <logger name="*" minlevel="Debug" writeTo="f" />
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    -->
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  </rules>
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</nlog>
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​
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数据库源配置参阅 https://github.com/liangshiw/LogDashboard/blob/master/samples/DatabaseSource/NLog.config​
安装LogDashboard
准备工作已经结束，这时安装LogDashboard
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Install-Package LogDashboard
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添加自定义日志模型
在项目中添加ApplicationLogModel类，并继承 LogModel 接口
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public class ApplicationLogModel : LogModel
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{
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    public string Application { get; set; }
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​
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    public string RequestMethod { get; set; }
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​
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    public string MachineName { get; set; }
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}
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我们自定义了 Application 、RequestMethod、MachineName 属性
打开Startup.cs 文件
在 ConfigureServices 方法中配置服务
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public void ConfigureServices(IServiceCollection services)
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{
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    // 自定义变量
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    LogManager.Configuration.Variables["application"] = "CustomLogModel";
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    LogManager.Configuration.Variables["requestMethod"] = "Get";
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    services.AddLogDashboard(opt => { opt.CustomLogModel<ApplicationLogModel>(); });
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}
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在AddLogDashoard 时使用optionsCustomLogModel 方法注册自定义模型，并使用了nlog的方法进行自定义变量值，因为machineName 是nlog预定义的变量,所以不需要手动斌值。更多内容请参阅nlog文档
在Configure 方法配置中间件
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public void Configure(IApplicationBuilder app, IHostingEnvironment env)
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{
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    if (env.IsDevelopment())
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    {
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        app.UseDeveloperExceptionPage();
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    }
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​
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    app.UseLogDashboard();
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​
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    app.Run(async (context) =>
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    {
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        await context.Response.WriteAsync("Hello World!");
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    });
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}
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运行项目导航到 /logdashboard
enjoy

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