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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>></span> The issue is in what the benefit is in having
Markers for each of the various kinds of alerts<o:p></o:p></p>
<p class=MsoNormal>There would be only one Marker implementation which would
contain any information required(alertkey, level1/level2 classification etc) to
send an alert. This would allow the flexibility to send different alerts with
the same API(they can provide defaults, but it would not be enough given that
different infrastructure components will send alerts with different properties).<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>>If you check out the SLF4J extensions you will find an
EventLogger class that is meant to do this kind of >thing. It uses a Marker
to categorize the log record as an Event. It then uses a companion EventData
class to >capture the specific data related to the event.<o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I have checked it out and what I have found is that the
EventData is simply logged as an xml via an SLF4J logger. This is insufficient
for me because the companion data needs to be available in the appender itself,
because he is the only one who knows how to interpret them.<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>>The MDC is appropriate to capture information that would
be common to any log record written during the >lifetime of the request. <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>agree<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'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>Zoltan Szel<br>
</span><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";
color:black'>Morgan Stanley | IDEAS Practice Areas<br>
</span></b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";
color:black'>Lechner Odon fasor 8 | Floor 07<br>
Budapest, 1095<br>
Phone: +36 1 881-3978<br>
<a href="mailto:Zoli.Szel@MorganStanley.com">Zoli.Szel@MorganStanley.com</a></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
dev-bounces@slf4j.org [mailto:dev-bounces@slf4j.org] <b>On Behalf Of </b>Ralph
Goers<br>
<b>Sent:</b> Thursday, June 04, 2009 3:12 PM<br>
<b>To:</b> slf4j developers list<br>
<b>Subject:</b> Re: [slf4j-dev] Usage of Markers<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>The issue is in what the benefit is in having Markers for
each of the various kinds of alerts. If you check out the SLF4J extensions you
will find an EventLogger class that is meant to do this kind of thing. It uses
a Marker to categorize the log record as an Event. It then uses a companion
EventData class to capture the specific data related to the event.
Documentation is in extensions.html.<o:p></o:p></p>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>The MDC is appropriate to capture information that would be
common to any log record written during the lifetime of the request. The
EventData is just for the single event.<o:p></o:p></p>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>Ralph<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<div>
<p class=MsoNormal>On Jun 4, 2009, at 4:03 AM, Szel, Zoltan wrote:<o:p></o:p></p>
</div>
<p class=MsoNormal><br>
<br>
<o:p></o:p></p>
<div>
<div>
<div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'>Hi all,<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'>we are planning to build alerting functionality around the SLF4J
API and we thought about leveraging the Marker API for this. The reason why we
need Markers is simple, more information have to be provided to perform the
required LoggingEvent => AlertEvent conversion. What I have in my mind is
the following:<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'>Create an Alert marker which implements the marker interface +
have additional getters/setters to provide the required properties to the
alerting appender. The usage would look like this:<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'>Logger.error(new Alert(…),”The aircondition is
down”)<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'>However this does not seems to be the recommended way for using
Markers where you would consult with the MarkerFactory for the appropriate
Marker instance(MarkerFactory.getMarker(“ALERT”)).<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'>What’s your thought on using Marker’s in this way? If
you see any problem with it what would you recommend to provide extra
contextual data to the log message(MDC is not appropriate here given the amount
of code one might have to write to populate the Map)?<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'>Thanks for your help in advance!<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'>Kind Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>Zoltan Szel<br>
</span><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";
color:black'>Morgan Stanley | IDEAS Practice Areas<br>
</span></b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";
color:black'>Lechner Odon fasor 8 | Floor 07<br>
Budapest, 1095<br>
Phone: +36 1 881-3978<br>
<a href="mailto:Zoli.Szel@MorganStanley.com">Zoli.Szel@MorganStanley.com</a></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p></o:p></span></p>
</div>
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<p class=MsoNormal><o:p> </o:p></p>
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