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Maybe someone more familiar with JCA will chime in, but as far as
JBoss Logging I don't believe there are any listeners or callbacks.
If you're going to use JBoss Logging you might as well just use a
Logger rather than the ManagedConnection.getLogWriter(). You'd have
more control over the configuration that way.<br>
<br>
On 12/06/2011 02:09 AM, Buerenheide, Christian wrote:
<blockquote
cite="mid:80FE736AF39C384FA5479B4683D1D4B829EEB0D8F8@DEEXVS51.wincor-nixdorf.com"
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<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">Hi all,<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">we implemented a
resource adapter which makes use of
the PrintWriter instance injected to<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">the managed
connection factory for error
logging/tracing purposes. By searching for a way to<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">enable/disable
tracing during runtime we found out
that the JCA container of jboss-as-7.1.0.CR1 <o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">just injects a
System.out printer during deployment
time. If I this isn't right, please correct me. <o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">The JCA (1.5) spec
says the following:<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">"An application
server manages the association
of a log writer with a<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">ManagedConnectionFactory.
When a
ManagedConnectionFactory instance is<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">created, the log
writer is initially null and logging
is disabled. Associating a log<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">writer with a
ManagedConnectionFactory instance
enables logging and tracing<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">for the
ManagedConnectionFactory instance."<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">This is exactly the
behaviour that we would like to
have :-)<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">In our opinion it
would be a better idea to write to
a specific JBoss logger rather than to System.out.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">I checked out the
sources from github and locally
tested with a PrintWriter wrapper subclass which <o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">prints out to a
org.jboss.logging.Logger instance if
trace is enabled for that particular logger.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">It would be also
nice if we could get notified about log
level changes so that we could reset<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">the
ManagedConnection.logWriter back to null if
tracing gets disabled. If so, the log writer could be <o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">null checked within
the RA implementation so that the
trace code (e.g. message formatting) doesn’t <o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">need to be executed
if trace is disabled…<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">Is there a kind of
callback mechanism implemented in
jboss logging?<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">What's your opinion
about a suitable solution? Do you
have any proposals?<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">Best regards<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">Christian<o:p></o:p></span></font></p>
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<pre class="moz-signature" cols="72">--
James R. Perkins
JBoss by Red Hat</pre>
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