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POlog4net process id information
 

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    <p>I am trying to create a logging solution that involves multiple processes on multiple machines. I planned on using the UDPAppender to send all log messages to a single machine that would manage them. I have a few questions about patternstrings vs patternlayouts.</p> <p>Because I need to know both which machine and which process that log message came from, I want to include that in the log as well. I found %property{log4net:HostName} for hostname, and that works great. However, I don't see anything for process id in PatternLayouts. I do, of course, see something like that in the PatternString. From the FAQ:</p> <pre><code>&lt;appender name="LogFileAppender" type="log4net.Appender.FileAppender"&gt; &lt;file type="log4net.Util.PatternString" value="log-file-[%processid].txt" /&gt; &lt;layout type="log4net.Layout.PatternLayout" value="%date [%thread] %-5level %logger - %message%newline" /&gt; &lt;/appender&gt; </code></pre> <p>But I am not sure if or how to mix and match the two (or even if this is the canonical way to do so).</p> <p>So, my questions are:</p> <ol> <li><p>What is the difference between PatternString and PatternLayout? Why have both?</p></li> <li><p>I see the %processid in PatternString, how do I get the same in PatternLayout? Here is my test layout:</p> <pre><code>&lt;layout type="log4net.Layout.PatternLayout"&gt; &lt;conversionPattern value="%date [%thread] [%property{log4net:HostName}] %-5level %logger - %message%newline" /&gt; &lt;/layout&gt; </code></pre></li> <li><p>Finally, it makes sense to use the XML layout for the UDP appender. It looks like the XmlLayoutSchemaLog4j already adds the HostNameProperty to the XML message. If I wan't to add this new Process ID (and maybe Process Name) to the XML message, what is the best way to do this? Should I just copy src\Layouts\XmlLayoutSchemaLog4j.cs, modify it, and let log4net know that I created this new Layout (like the SampleLayoutsApp)?</p></li> </ol> <p>Thanks for your help</p>
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