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From Ceki Gülcü <...@qos.ch>
Subject Re: daily log file question
Date Wed, 08 Aug 2001 20:05:07 GMT
At 09:31 08.08.2001 -0700, Don Taylor wrote:
>--- Aron Kramlik <aron.kramlik@itouch.com.au> wrote:
>> Hi,
>> I would like to ask if the DailyRollingFileAppender is the class that
>> is
>> meant to be used for log files that need to be rolled every day.
>It is.
>> I have seen some discussion in the archives and I am not sure it
>> is production ready from the discussions - could you please advise
>> if this is considered ready to be used in production?  Also, a simple
>> example, or pointer to an example, of how one can go about using it.
>> Thanks,
>> Aron Kramlik
>> aron.kramlik@itouch.com.au
>Most of the discussion involves it not working the way you really want.
>I have a version that's in production that does what most people want,
>but it's only been in production a couple of weeks. I'm planning on
>posting it to the group this weekend, after it's cleaned-up some
>(getting it up to the coding standards, placing it in the right
>package, and so on.) In the meantime, go ahead and use the existing
>The problems my version resolves:
>1. DailyRollingFileAppender will not rollover the log file if the
>application isn't running at the time of the rollover.
>(Actually, a fix to this has already been posted. I've just
>incorporated it in my version.)


>2. DailyRollingFileAppender does not use the date/time stamp in the
>file name for the currently active logging file.

Yes, this was suggested as a change. However, some users need the behavior to remain the same.

>3. DailyRollingFileAppender always appends the date/time stamp to the
>filename, rather than determining if an extension exists and inserting
>the date/time stamp just before the extension. This really helps when
>viewing the log file in extension-oriented systems such as Windows.

Makes sense.

>4. DailyRollingFileAppender does not limit the maximum number of logs
>that can be created. It'll create logs forever. My version does the
>same thing, but you can optionally set a limit. (You can't limit the
>size, only the number.)

Seems reasonable.

>5. DailyRollingFileAppender doesn't work well with layouts such as
>HTMLLayout. Everytime you start a logging session a header is sent to
>the log. That makes an HTML file a mess. My version allows you to
>specify how to handle the header when appending to an already-existing

Good point.

>Is DailyRollingFileAppender ready for production? Sure, just pay
>attention to the caveats. If you're interested in my version, give me a
>couple of days to clean it up and get it posted. In the meantime, just
>use DailyRollingFileAppender.

Please post it when you are done. Ceki

Ceki Gülcü - http://qos.ch

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