Hello Eric,
Thanks for using logback :)
Appender threshold are not available in logback because the Appender class is in the
core module, where there is no concept of level. However, like you correctly
mentionned, the use of a filter can provide the functionnality that the threshold
offers.
We are right in the process of testing filter performance. If the use of expression
based filters is not satisfying in terms of speed, we will add a dedicated filter to
cover this use case.
You can expect a more precised and detailled answer within the next 24 hours, once
I've investigated further.
Cheers,
Sébastien
Eric Yung wrote:
Hi,
I have migrated from log4j to slf4j and logback. I have one question for
the appender setting. In log4j, you can set the threshold of an appender
so that only a certain level of log messages will be logged by that
appender. But in logback, I can only achieve this behavior by using a
expression filter. I would like to know the performance figure about
that filter. If the expression filter takes much longer than a dedicated
log level filter, I would like to see a simple log level filter be
included in logback.
Thanks,
Eric
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Sébastien Pennec
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Logback: The reliable, generic, fast and flexible logging framework for Java.
http://logback.qos.ch/
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