Benutzer:MovGP0/Logging

Logging

Log Levels

Log4J Log Levels
Level	Description
OFF	The highest possible rank and is intended to turn off logging.
FATAL	Severe errors that cause premature termination. Expect these to be immediately visible on a status console.
ERROR	Other runtime errors or unexpected conditions. Expect these to be immediately visible on a status console.
WARN	Use of deprecated APIs, poor use of API, 'almost' errors, other runtime situations that are undesirable or unexpected, but not necessarily "wrong". Expect these to be immediately visible on a status console.
INFO	Interesting runtime events (startup/shutdown). Expect these to be immediately visible on a console, so be conservative and keep to a minimum.
DEBUG	Detailed information on the flow through the system. Expect these to be written to logs only.
TRACE	Most detailed information. Expect these to be written to logs only.

NuGet-Pakete

NLog	log4net
NLog NLog.Config NLog.Schema	log4net log4net.Ext.Json

Konfiguration

NLog

log4net

app.config / web.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="nlog" type="NLog.Config.ConfigSectionHandler, NLog"/>
  </configSections>

  <nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <include file="NLog.config" />
  </nlog>

  <appSettings>
  </appSettings>

NLog.config

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <targets>
    <target xsi:type="EventLog" name="eventLog" layout="${message}${newline}${exception:format=ToString}" source="${appName}" />
  </targets>
  <rules>
    <logger name="*" minlevel="Error" writeTo="eventLog" />
  </rules>
</nlog>

app.config / web.config

<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
  </configSections>

  <log4net>
    <!-- base config -->
  </log4net>

  <appSettings>
     <add key="log4net.Config" value="log4net.config" />
  </appSettings>

log4net.config

<log4net debug="true">
  <appender name="EventLogAppender" type="log4net.Appender.EventLogAppender" >
    <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
    </layout>
  </appender>

  <root>
    <level value="DEBUG" />
    <appender-ref ref="EventLogAppender" />
  </root>
</log4net>

Stephen Pickett: How to remove warning: The ‘log4net’ element is not declared. In: Stephen Pickett's Blog. 31. Dezember 2012, abgerufen am 26. Mai 2014 (englisch, Einbeinden des log4net Schema-Datei (log4net.xsd)).

Log4Net Debugging

  <system.diagnostics>
    <trace autoflush="true">
      <listeners>
        <add name="textWriterTraceListener" type="System.Diagnostics.TextWriterTraceListener" initializeData="%TEMP%\log.txt" />
      </listeners>
    </trace>
  </system.diagnostics>

  <appSettings>
    <add key="log4net.Internal.Debug" value="true"/>
  </appSettings>

Log4Net Troubleshooting. In: You've Been Haacked. 27. September 2006, abgerufen am 12. Februar 2015.
Log4Net XSD. (XSD) In: csharptest.net. Abgerufen am 12. Februar 2015.

Common Logging

  <configSections>
    <sectionGroup name="common">
      <section name="logging" type="Common.Logging.ConfigurationSectionHandler, Common.Logging" />
    </sectionGroup>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
    <!-- ... -->
  </configSection>
  <!-- ... -->
  <common>
    <logging>
      <factoryAdapter type="Common.Logging.Log4Net.Log4NetLoggerFactoryAdapter, Common.Logging.Log4Net1211">
        choices are INLINE, FILE, FILE-WATCH, EXTERNAL
        otherwise BasicConfigurer.Configure is used
        log4net configuration file is specified with key configFile
        <arg key="configType" value="FILE-WATCH" />
        <arg key="configFile" value="~/Config/log4net.config"/>
        <arg key="level" value="INFO" />
      </factoryAdapter>
    </logging>
  </common>
  <!-- ... -->

Bootstrapping

Bootstrapping von log4net
log4net
in Global.asax protected void Application_Start(Object sender, EventArgs e) { log4net.Config.XmlConfigurator.Configure(); } oder AssemblyInfo.cs [assembly: log4net.Config.XmlConfigurator(Watch = true)]

Manuelles Laden der Konfiguration
(falls kein Zugriff auf web.config)

NLog

log4net

using(var config = Assembly.GetExecutingAssembly().GetManifestResourceStream("nlog.config"))
{
   var reader = XmlReader.Create(config);
   NLog.LogManager.Configuration = new NLog.Config.XmlLoggingConfiguration(reader, true));
}

using(var config = Assembly.GetExecutingAssembly().GetManifestResourceStream("log4net.config"))
{
   XmlConfigurator.Configure(config);
}

PostSharp-Aspekt

NLog

Log4Net

using NLog;
using PostSharp.Aspects;
using System;

namespace .....
{
    [Serializable]
    public class LogAttribute : OnMethodBoundaryAspect
    {
        [NonSerialized]
        private Logger logger;

        public LogAttribute()
        {
            logger = LogManager.GetCurrentClassLogger();
        }

        public override void OnEntry(MethodExecutionArgs args)
        {
            logger.Trace(string.Format("Entering {0}.{1}.", args.Method.DeclaringType.Name, args.Method.Name));
        }

        public override void OnExit(MethodExecutionArgs args)
        {
            logger.Trace(string.Format("Leaving {0}.{1}.", args.Method.DeclaringType.Name, args.Method.Name));
        }

        public override void OnException(MethodExecutionArgs args)
        {
            logger.Error(args.Exception.Message, args.Exception);
        }
    }
}

using NLog;
using PostSharp.Aspects;
using System;

namespace .....
{
    [Serializable]
    public class LogAttribute : OnMethodBoundaryAspect
    {
        [NonSerialized]
        private ILog logger;

        public LogAttribute()
        {
            logger = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
        }

        public override void OnEntry(MethodExecutionArgs args)
        {
            logger.Trace(string.Format("Entering {0}.{1}.", args.Method.DeclaringType.Name, args.Method.Name));
        }

        public override void OnExit(MethodExecutionArgs args)
        {
            logger.Trace(string.Format("Leaving {0}.{1}.", args.Method.DeclaringType.Name, args.Method.Name));
        }

        public override void OnException(MethodExecutionArgs args)
        {
            logger.Error(args.Exception.Message, args.Exception);
        }
    }
}

Global Exception Logging

Console Application

static void Main() {
    AppDomain.CurrentDomain.UnhandledException += UnhandledExceptionTrapper;
    // ...
}

ASP.NET Application

Complete Example for Error Handlers. In: MSDN. Microsoft, abgerufen am 26. Mai 2014 (englisch).

Benutzer:MovGP0/Logging

Inhaltsverzeichnis

Logging

Log Levels

NuGet-Pakete

Konfiguration

Log4Net Debugging

Common Logging

Bootstrapping

PostSharp-Aspekt

Global Exception Logging

Navigationsmenü

Benutzer:MovGP0/Logging

Logging

Log Levels

NuGet-Pakete

Konfiguration

Log4Net Debugging

Common Logging

Bootstrapping

PostSharp-Aspekt

Global Exception Logging

Navigationsmenü

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