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List: log4net-user
Subject: RE: How to dynamically query and set logger levels?
From: Joe <jocularjoe () hotmail ! com>
Date: 2013-12-04 21:17:30
Message-ID: DUB125-DS167F0DDB9FEB7F4B3C86B3C3D40 () phx ! gbl
[Download RAW message or body]
I posted an answer to your SO question.
Basically the code sample you quoted isn't accurate: instead of casting ILog
to log4net.Repository.Hierarchy.Logger you should be casting ILog.Logger.
I've implemented an abstraction around these administrative functions: a
class "LoggerTree" that exposes a hierarchy of instantiated loggers, with a
method to update the Level for any node in the tree.
I use this to display an administrative UI with a treeview of loggers with
the option to change the logging level.
If anyone's interested I'd be happy to share the code.
From: George Mauer [mailto:gmauer@gmail.com]
Sent: 04 December 2013 21:17
To: log4net-user@logging.apache.org
Subject: Re: How to dynamically query and set logger levels?
I've posted this on Stackoverflow if anyone wants to answer it on there for
SO rep..
<http://stackoverflow.com/questions/20384888/query-and-modify-log4net-logger
-levels-from-code>
I would like to create an area in my application that will let sysadmins
modify logger levels directly.
This stackoverflow answer from 2009 <http://stackoverflow.com/a/738239/5056>
implies that I can do it with
foreach (ILog logger in log4net.LogManager.GetCurrentLoggers())
{
((log4net.Repository.Hierarchy.Logger)logger).Level =
log4net.Core.Level.Error;
}
My application uses log4net 2.0.3 (1.2.13)
<https://www.nuget.org/packages/log4net/> and this seems to not be
available as no implementation of ILog inherits that class.
Instead I can grab each ILog's instances of ILogger to give me the name but
will not let me query or set the Level. There is nothing I can cast this to
in the meantime as it seems to be implemented by an internal class.
PS. How exactly does the email confirmation protect me from someone
subscribing falsely? I subscribed by emailing from this address!
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class=WordSection1><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I posted an \
answer to your SO question.<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Basically \
the code sample you quoted isn’t accurate: instead of casting ILog to \
log4net.Repository.Hierarchy.Logger you should be casting ILog.Logger. \
<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I’ve \
implemented an abstraction around these administrative functions: a class \
“LoggerTree” that exposes a hierarchy of instantiated loggers, with a \
method to update the Level for any node in the tree.<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I use this \
to display an administrative UI with a treeview of loggers with the option to change \
the logging level.<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If \
anyone’s interested I’d be happy to share the \
code.<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p \
class=MsoNormal><b><span lang=EN-US \
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span \
lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> George Mauer \
[mailto:gmauer@gmail.com] <br><b>Sent:</b> 04 December 2013 21:17<br><b>To:</b> \
log4net-user@logging.apache.org<br><b>Subject:</b> Re: How to dynamically query and \
set logger levels?<o:p></o:p></span></p><p \
class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span \
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><a \
href="http://stackoverflow.com/questions/20384888/query-and-modify-log4net-logger-levels-from-code">I've \
posted this on Stackoverflow if anyone wants to answer it on there for SO \
rep..</a></span><o:p></o:p></p></div><div><p \
class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span \
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I would like to create an \
area in my application that will let sysadmins modify logger levels \
directly.</span><o:p></o:p></p><div><p class=MsoNormal><span \
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p></div><div><p \
class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><a \
href="http://stackoverflow.com/a/738239/5056" target="_blank">This stackoverflow \
answer from 2009</a> implies that I can do it \
with<o:p></o:p></span></p></div><div><p class=MsoNormal><span \
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p></div><div><pre \
style='margin-bottom:7.5pt;line-height:13.5pt;background:#EEEEEE;vertical-align:baseline;white-space:pre-wrap;max-height:600px;word-wrap:normal;overflow:auto'><span \
style='font-size:10.5pt;font-family:Consolas'><o:p> </o:p></span></pre><pre \
style='line-height:13.5pt;background:#EEEEEE;vertical-align:baseline'><code><span \
style='font-family:Consolas;color:darkblue;border:none windowtext \
1.0pt;padding:0cm'>foreach</span></code><code><span \
style='font-family:Consolas;border:none windowtext 1.0pt;padding:0cm'> (<span \
style='color:#2B91AF'>ILog</span> logger <span style='color:darkblue'>in</span> \
log4net.<span style='color:#2B91AF'>LogManager</span>.<span \
style='color:#2B91AF'>GetCurrentLoggers</span>())<o:p></o:p></span></code></pre><pre \
style='line-height:13.5pt;background:#EEEEEE;vertical-align:baseline'><code><span \
style='font-family:Consolas;border:none windowtext \
1.0pt;padding:0cm'>{<o:p></o:p></span></code></pre><pre \
style='line-height:13.5pt;background:#EEEEEE;vertical-align:baseline'><code><span \
style='font-family:Consolas;border:none windowtext 1.0pt;padding:0cm'> \
((log4net.<span style='color:#2B91AF'>Repository</span>.<span \
style='color:#2B91AF'>Hierarchy</span>.<span \
style='color:#2B91AF'>Logger</span>)logger).<span style='color:#2B91AF'>Level</span> \
= <o:p></o:p></span></code></pre><pre \
style='line-height:13.5pt;background:#EEEEEE;vertical-align:baseline'><code><span \
style='font-family:Consolas;border:none windowtext \
1.0pt;padding:0cm'> log4net.<span \
style='color:#2B91AF'>Core</span>.<span style='color:#2B91AF'>Level</span>.<span \
style='color:#2B91AF'>Error</span>;<o:p></o:p></span></code></pre><pre \
style='line-height:13.5pt;background:#EEEEEE;vertical-align:baseline'><code><span \
style='font-family:Consolas;border:none windowtext \
1.0pt;padding:0cm'>}</span></code><span \
style='font-size:10.5pt;font-family:Consolas'><o:p></o:p></span></pre></div><div><p \
class=MsoNormal><span \
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p></div><div><p \
class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>My \
application uses <a href="https://www.nuget.org/packages/log4net/">log4net 2.0.3 \
(1.2.13)</a> and this seems to not be available as no implementation of ILog inherits \
that class. <o:p></o:p></span></p></div><div><p class=MsoNormal><span \
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p></div><div><p \
class=MsoNormal><span \
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Instead I can grab each \
ILog's instances of ILogger to give me the name but will not let me query or set the \
Level. There is nothing I can cast this to in the meantime as it seems to be \
implemented by an internal class.<o:p></o:p></span></p></div><div><p \
class=MsoNormal><span \
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p></div><div><p \
class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>PS. \
How exactly does the email confirmation protect me from someone subscribing falsely? \
I subscribed by emailing from this \
address!<o:p></o:p></span></p></div></div></div></div></body></html>
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