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From "Dale King" <dalewk...@gmail.com>
Subject Re: how to make the system generate the output log file suffix?
Date Sat, 07 Jun 2008 01:23:00 GMT
On Fri, Jun 6, 2008 at 9:43 AM, Ning Zhao <nzh@hacon.de> wrote:
> Hi all!
>
> in my log4cxx.properties file, I'd like to write the output log file name in
> this way:
>
> log4j.appender.R.File=%h/myApp%g.log
>
> where %h means my home directory and  %g  means the generated  file name
> suffix. For example, myApp0.log, myApp1.log, myApp2.log, ....
>
> ( Please see
> http://java.sun.com/j2se/1.4.2/docs/api/java/util/logging/FileHandler.html )
>
> I tried but it did not work. Is the feature I wanted available at all in
> log4cxx? If not, any solution/work around? Many thanks in advance!
>
>
> Best Regards,
> Ellen N. Zhao
>
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>


As far as the home directory part log4cxx does support expanding
environment variables in the form of ${VARIABLE}.

For the other part I think you want a RollingFileAppender. Note there
are two different RollingFileAppenders:

org.apache.log4j.rolling.RollingFileAppender
org.apache.log4j.RollingFileAppender

The first one cannot be configured from a properties file (requires
XML configuration). It is more general purpose but is more complex to
configure.

The second one is more equivalent to the class you linked to. The
equivalent file pattern on windows would be:

${USERPROFILE}/myApp%i.log

-- 
Dale King

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