使用log4net记录ABP日志

demo地址：ABP.WindowsService
该文章是系列文章 基于.NetCore和ABP框架如何让Windows服务执行Quartz定时作业 的其中一篇。

参考：https://aspnetboilerplate.com/Pages/Documents/Logging
ABP框架使用的是Castle Windsor的日志工具，Castle Windsor定义了日志接口
ILogger，并提供了Log4Net, NLog, Serilog的实现。

首先，nuget添加Abp.Castle.Log4Net，github地址：Abp.Castle.Log4Net。
然后，添加AppConfigurations，根据环境变量获取log4net.config的绝对路径，模仿appsettings.json的使用方式。代码如下：

using Abp.Extensions;
using System.Collections.Concurrent;
using System.IO;

namespace Demo.MyJob.Configuration
{
    public static class AppLog4NetConfigs
    {
        private static readonly ConcurrentDictionary<string, string> Log4NetConfigCache;

        static AppLog4NetConfigs()
        {
            Log4NetConfigCache = new ConcurrentDictionary<string, string>();
        }

        public static void AddProperty(string key, string value)
        {
            log4net.GlobalContext.Properties[key] = value;
        }

        public static string Get(string path, string environmentName = null)
        {
            var cacheKey = path + "#" + environmentName;

            return Log4NetConfigCache.GetOrAdd(
                cacheKey,
                _ => BuildLog4NetConfig(path, environmentName)
            );
        }

        private static string BuildLog4NetConfig(string path, string environmentName = null)
        {
            var configFile = Path.Combine(path, "log4net.config");

            if (environmentName.IsNullOrWhiteSpace())
            {
                return configFile;
            }

            var tempPath = Path.Combine(path, $"log4net.{environmentName}.config");
            if (File.Exists(tempPath))
            {
                configFile = tempPath;
            }

            return configFile;
        }
    }
}

最后，先在ConfigureAppConfiguration获取绝对路径，

AppLog4NetConfigs.AddProperty("LogsDirectory", hostingEnvironment.ContentRootPath);
LogConfigFile = AppLog4NetConfigs.Get(hostingEnvironment.ContentRootPath, hostingEnvironment.EnvironmentName);

接着添加日志配置

IocManager.IocContainer.AddFacility<LoggingFacility>(
    f => f.UseAbpLog4Net().WithConfig(LogConfigFile)
    );

测试一下
在Execute添加日记记录

LogHelper.Logger.Info(nameof(SayHelloJob));

测试ok。

log4net.config参考

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <log4net>
    <appender name="ManagedColoredConsoleAppender" type="log4net.Appender.ManagedColoredConsoleAppender">
      <mapping>
        <level value="ERROR" />
        <foreColor value="Red" />
      </mapping>
      <mapping>
        <level value="Info" />
        <foreColor value="Green" />
      </mapping>
      <mapping>
        <level value="DEBUG" />
        <foreColor value="Blue" />
      </mapping>
      <mapping>
        <level value="WARN" />
        <foreColor value="Yellow" />
      </mapping>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%d{ABSOLUTE} [%thread] %-5p %c{1}:%L - %m%n" />
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <param name="LevelMin" value="DEBUG" />
        <param name="LevelMax" value="Fatal" />
      </filter>
    </appender>
    <appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
      <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
      <file type="log4net.Util.PatternString" value="%property{LogsDirectory}\logs\" />
      <datePattern value="'my-windows-service-'dd.MM.yyyy'.log'" />
      <staticLogFileName value="false" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <maxSizeRollBackups value="10" />
      <maximumFileSize value="5MB" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%d [%t] %-5p %c - %m%n" />
      </layout>
    </appender>
    <root>
      <level value="DEBUG" />
      <appender-ref ref="ManagedColoredConsoleAppender" />
      <appender-ref ref="RollingFile" />
    </root>
  </log4net>
</configuration>