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<div class="moz-cite-prefix">The way that the logback FAQ example
for shared configuration for multiple JEE apps is written, it WILL
create this superflous log file, application-name_IS_UNDEFINED.log
(unless there is some system specific behavior involved in
creating an empty file when the stream is opened). <br>
<br>
The way logback's slfj static logger binding mechanism is written
it seems to be necessary to let it configure itself once before
you can get a hold of the LoggerContext to configure it. It would
be nice if there were a way to inject configuration behavior into
StaticLoggerBinder so that it would use it, and not force you to
do a second configuration the way both this example and the
manual's "Invoking JoranConfigurator directly" example does it.<br>
<br>
This situation seems to have JMX implications too. In my case, I
am setting my context name using a property the same way I am
dynamically setting the log file names. When I look at that using
the Java Management Console, I see a
/application-nameIS_UNDEFINEDLogbackContext but no entry with my
revised context name after the re-config.<br>
<br>
My workaround (for both the spurious log file and the context
name) is to set application-name as a system property, instead of
doing what the example code does. Perhaps the example should be
changed to do that, though it would be nicer to be able to pass a
property specifically to logback instead of sticking it in the
global system property space.<br>
<br>
Cheers,<br>
<br>
Eric<br>
<br>
On 8/22/2012 3:38 PM, Eric Schwarzenbach wrote:<br>
</div>
<blockquote cite="mid:50353552.2010608@blackbrook.org" type="cite">
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<div class="moz-cite-prefix">I realized I needed to move my
ServletContextListener above the Spring ContextLoaderListener in
my web.xml. However it is still creating a
application-name_IS_UNDEFINED.log, though an empty (0 byte) one.<br>
<br>
Putting a breakpoint on the ContextLoaderListener<b> </b>doConfigure
methods, I see it is getting called as a result of the line <br>
<br>
LoggerContext context = (LoggerContext)
LoggerFactory.getILoggerFactory(); <br>
<br>
(from the manual's example) via
org.slf4j.impl.StaticLoggerBinder init method (from the
logback-classic.jar).<br>
<br>
Any suggestions how I can avoid that? Is there a better way to
get the LoggerContext?<br>
<br>
Eric<br>
<br>
On 8/22/2012 2:53 PM, Eric Schwarzenbach wrote:<br>
</div>
<blockquote cite="mid:50352A98.9070105@blackbrook.org" type="cite">I'm
trying to use variable substitution for my log file names, using
the webapp / context name. (My use case is not literally a
shared configuration, but two webapps deployed using copies of
the same war with different names...so they each have their own
logback.xml, though they are identical). I'm using the example
on <a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://logback.qos.ch/faq.html#sharedConfiguration">http://logback.qos.ch/faq.html#sharedConfiguration</a>
as my basis, and while it is working, my webapp ends up creating
two log files. <br>
<br>
First it creates one called application-name_IS_UNDEFINED.log
with some of the first messages logged during startup, and then
foo.log (where foo is the app name) with all subsequent
messages. So it seems to me that the contextInitialized method
of ServletContextListener isn't early enough, and that the
default logback config is initializing earlier. This is using
Tomcat 7, and Java 7. <br>
<br>
How can I either hook into the earlier initialization or replace
it? Where does that initialization happen? Is that static code?
<br>
<br>
Thanks, <br>
<br>
Eric <br>
<br>
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