多程序集在相同的进程中使用独立的配置文件。
在平时的软件开发中常常会使用一些第三方的库，第三方的库与我们的程序都使用log4net来做日志记录，在默认的情况下我们使用相同的配置来使用log4net的的配置文件。但是在很多情况下，我们需要的日志配置与第三方类库的日志配置信息需要是独立的。在这种情况下如何解决此问题？
解决方案结构如下：
应用程序SimpleApp与SharedModule使用相同的配置，第三方类库SimpleModule使用独立的配置。
SimpleApp EntryPoint的源代码
#region Copyright & License
//
// Copyright 2001-2005 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#endregion
// Configure logging for this assembly using the 'SimpleApp.exe.log4net' file
//配置log4net监视的配置文件后缀为log4net的文件
[assembly: log4net.Config.XmlConfigurator(ConfigFileExtension="log4net", Watch=true)]
// The following alias attribute can be used to capture the logging
// repository for the 'SimpleModule' assembly. Without specifying this
// attribute the logging configuration for the 'SimpleModule' assembly
// will be read from the 'SimpleModule.dll.log4net' file. When this
// attribute is specified the configuration will be shared with this
// assemby's configuration.
//[assembly: log4net.Config.AliasRepository("SimpleModule")]
namespace SimpleApp
{
using System;
/// <summary>
/// Summary description for Class1.
/// </summary>
public class EntryPoint
{
// Create a logger for use in this class
private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
public static void Main(string[] args)
{
args=new string[] {"3","7"};
if (log.IsInfoEnabled) log.Info(args);
if (args.Length != 2)
{
log.Error("Must supply 2 command line arguments");
}
else
{
int left = int.Parse(args[0]);
int right = int.Parse(args[1]);
int result = 0;
if (log.IsDebugEnabled) log.Debug("Adding [" + left + "] to [" + right + "]");
result = (new SimpleModule.Math()).Add(left, right);
if (log.IsDebugEnabled) log.Debug("Result [" + result + "]");
Console.Out.WriteLine(result);
if (log.IsDebugEnabled) log.Debug("Subtracting [" + right + "] from [" + left + "]");
result = (new SharedModule.Math()).Subtract(left, right);
if (log.IsDebugEnabled) log.Debug("Result [" + result + "]");
Console.Out.WriteLine(result);
}
Console.Read ();
}
}
}
SimpleApp.exe.log4net 配置
<?xml version="1.0" encoding="utf-8" ?>
<!-- This section contains the log4net configuration settings -->
<log4net>
<!-- Define some output appenders -->
<appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender" >
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="[SimpleAppConfig] %date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<appender name="LogFileAppender" type="log4net.Appender.FileAppender">
<file value="log-file.txt" />
<!-- Example using environment variables in params -->
<!-- <file value="${TMP}\log-file.txt" /> -->
<appendToFile value="true" />
<!-- An alternate output encoding can be specified -->
<!-- <encoding value="unicodeFFFE" /> -->
<layout type="log4net.Layout.PatternLayout">
<header value="[Header]
" />
<footer value="[Footer]
" />
<conversionPattern value="%date [%thread] %-5level %logger [%ndc] <%property{auth}> - %message%newline" />
</layout>
<!-- Alternate layout using XML
<layout type="log4net.Layout.XMLLayout" /> -->
</appender>
<!-- Setup the root category, add the appenders and set the default level -->
<root>
<level value="DEBUG" />
<appender-ref ref="ConsoleAppender" />
<appender-ref ref="LogFileAppender" />
</root>
</log4net>
SimpleModule 项目
Math.cs 代码
#region Copyright & License
//
// Copyright 2001-2005 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#endregion
// We want this assembly to have a seperate logging repository to the
// rest of the application. We will configure this repository seperatly.
//设定配置文件文件使用独立配置
[assembly: log4net.Config.Repository("SimpleModule")]
// Configure logging for this assembly using the 'SimpleModule.dll.log4net' file
//配置log4net监视的配置文件后缀为log4net的文件
[assembly: log4net.Config.XmlConfigurator(ConfigFileExtension="log4net", Watch=true)]
namespace SimpleModule
{
/// <summary>
/// Summary description for Math.
/// </summary>
public class Math
{
// Create a logger for use in this class
private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
public Math()
{
if (log.IsDebugEnabled) log.Debug("Constructor");
}
public int Add(int left, int right)
{
int result = left + right;
if (log.IsInfoEnabled) log.Info("" + left + " + " + right + " = " + result);
return result;
}
}
}
SimpleModule.dll.log4net 配置
<?xml version="1.0" encoding="utf-8" ?>
<!-- This section contains the log4net configuration settings -->
<log4net>
<!-- Define some output appenders -->
<appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender" >
<!--<file value="SimpleModule.txt" />-->
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="[hbb0b0SimpleModuleConfig] %date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<!-- Setup the root category, add the appenders and set the default priority -->
<root>
<level value="DEBUG" />
<appender-ref ref="ConsoleAppender" />
</root>
</log4net>
程序输出
