logging-log4j-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From F Kurzawa <majortay...@yahoo.com>
Subject RE: Decorating output before RollingFileAppender
Date Tue, 27 Jul 2004 18:46:51 GMT
This looks interesting and leaning towards what would suit me.

Forgive my ignorance, but I haven't seen any examples of how to use a filter
in a configuration file. Can you point me to some examples?

Thanks,

Frank


--- Scott Deboy <sdeboy@comotivsystems.com> wrote:

> I have written a couple of filters that 'decorate' logging events - that
> may be a better route to go.  See PropertyFilter and ReflectionFilter
> here:
> http://cvs.apache.org/viewcvs.cgi/jakarta-log4j/src/java/org/apache/log4
> j/varia/
> 
> In particular, ReflectionFilter sets the 'renderedMessage' on the event,
> which would probably be what you want to do.  You may want to consider
> relying on the Expression mechanism (see ExpressionFilter in the same
> package) as a flexible way to determine which events have the filter
> applied.
> 
> I haven't worked much with PaternLayout so I'm not sure how you would
> use it in a filter.
> 
> Scott
> 
> -----Original Message-----
> From: F Kurzawa [mailto:majortaylor@yahoo.com] 
> Sent: Tuesday, July 27, 2004 10:37 AM
> To: Log4J Users List
> Subject: RE: Decorating output before RollingFileAppender
> 
> 
> Hi Yoav,
> 
> I might be able to do what I want by extending RollingFileAppender, but
> a simpler solution for me would probably be to extend AsyncAppender to
> accept a PatternLayout parameter and then apply it before outputting to
> the next appender.
> 
> Regardless, I was really hoping for a solution that would not require
> extending log4j. I was hoping there was a way to decorate log entries
> "inline" by passing them through some sort of filter, much the way that
> AsyncAppender acts as a filter of sorts in front of another appender.
> 
> Regards,
> 
> Frank
> 
> 
> --- "Shapira, Yoav" <Yoav.Shapira@mpi.com> wrote:
> 
> > 
> > Hi,
> > You can always extend either RollingFileAppender or PatternLayout to 
> > suit your own needs.  That's a big plus of open-source and our ASF 
> > license ;)
> > 
> > Yoav Shapira
> > Millennium Research Informatics
> > 
> > 
> > >-----Original Message-----
> > >From: F Kurzawa [mailto:majortaylor@yahoo.com]
> > >Sent: Tuesday, July 27, 2004 12:37 PM
> > >To: Log4J Users List
> > >Subject: RE: Decorating output before RollingFileAppender
> > >
> > >Hi James,
> > >
> > >Sorry I wasn't clearer.
> > >
> > >I need to be able to decorate the output BEFORE RollingFileAppender.
> > This
> > >is
> > >because I need to have different lines laid out out differently
> > depending
> > >on
> > >which logger that they came from. I don't have enough control with 
> > >the single PatternLayout within RFA to get the different formatting 
> > >that I need.
> > >
> > >The intuitively obvious approach was to use multiple
> > RollingFileAppenders,
> > >each
> > >of which would write to the same file. But RollingFileAppender 
> > >becomes
> > very
> > >confused if other RFA's are writing to the same file, and the file
> > starts
> > >getting rotated willy-nilly as each RFA steps on the other.
> > >
> > >So that approach won't work.
> > >
> > >Regards,
> > >
> > >Frank
> > >
> > >--- James Stauffer <jstauffe@spscommerce.com> wrote:
> > >
> > >> RollingFileAppender extends FileAppender so it takes a 
> > >> PatternLayout
> > >also.
> > >>
> > >> James Stauffer
> > >>
> > >>
> > >> -----Original Message-----
> > >> From: F Kurzawa [mailto:majortaylor@yahoo.com]
> > >> Sent: Tuesday, July 27, 2004 10:55 AM
> > >> To: Log4J Users List
> > >> Subject: Decorating output before RollingFileAppender
> > >>
> > >>
> > >> I want to format and modify my log4j output prior to sending to a 
> > >> RollingFileAppender.
> > >>
> > >> If there were functionality that would allow me to easily apply a 
> > >> PatternLayout prior to sending to a RollingFileAppender that would 
> > >> be
> > >ideal.
> > >>
> > >> I can insert an AsyncAppender before my RollingFileAppender, but 
> > >> AsyncAppender does not take a PatternLayout parameter so it doesn't
> > help.
> > >>
> > >> In fact, the only two appenders that take PatternLayout arguments 
> > >> are
> > the
> > >> *FileAppender's and ConsoleAppender.
> > >>
> > >> Is there a simple way to decorate my output with a PatternLayout 
> > >> (or
> > some
> > >> similar functionality) prior to its arrival in a 
> > >> RollingFileAppender?
> > >>
> > >> Thanks in advance,
> > >>
> > >> Frank
> > >>
> 
> 
> =====
> Frank Kurzawa
> Topaz Software
> fkurzawa@topazsoftware.com
> 
> 
> 		
> __________________________________
> Do you Yahoo!?
> Y! Messenger - Communicate in real time. Download now. 
> http://messenger.yahoo.com
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: log4j-user-unsubscribe@logging.apache.org
> For additional commands, e-mail: log4j-user-help@logging.apache.org
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: log4j-user-unsubscribe@logging.apache.org
> For additional commands, e-mail: log4j-user-help@logging.apache.org
> 
> 


=====
Frank Kurzawa
Topaz Software
fkurzawa@topazsoftware.com


		
__________________________________
Do you Yahoo!?
New and Improved Yahoo! Mail - Send 10MB messages!
http://promotions.yahoo.com/new_mail 

---------------------------------------------------------------------
To unsubscribe, e-mail: log4j-user-unsubscribe@logging.apache.org
For additional commands, e-mail: log4j-user-help@logging.apache.org


Mime
View raw message