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https://jira.qos.ch/browse/SLF4J-124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=19469#comment-19469
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Joachim Durchholz commented on SLF4J-124:
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The big deal is that SLF4J would have to make sure that it is properly
translating the levels to that backend's idea of log levels.
This isn't always trivial.
Also, people will expect numeric log levels to be passed through unchanged.
(Oracle's JDBC is truly bizarre here: it does not differentiate between DEBUG
and TRACE, it simply uses one or two dozen numeric log levels across the entire
DEBUG and TRACE range defined by java.util.logging. Mapping this to non-numeric
libraries like logback will not be possible, to Logback may get pressured into
having a numeric log level anyway.)
Re whether numeric log levels are an ugly hack: Yes, but it's the least common
denominator between all logging backends, and DEBUG vs. TRACE isn't granular
enough for Oracle's log levels, and with JDBC, does even make sense because the
more verbose log levels can generate huge amounts of trace, so if SLF4J could
support the difference between 50000 and 40000 it would be helpful for ojdbc
user. (I know this is just supporting and perpetuating bad architectur. But
Oracle isn't going to improve this, ever, that company is driven purely be
paying customer requests and doesn't care about architecture unless it hurts
themselves.)
> Add ability to log at a dynamic level
> -------------------------------------
>
> Key: SLF4J-124
> URL: https://jira.qos.ch/browse/SLF4J-124
> Project: SLF4J
> Issue Type: Sub-task
> Components: Core API
> Affects Versions: 1.5.x
> Environment: Operating System: All
> Platform: All
> URL:
> http://stackoverflow.com/questions/2621701/setting-log-level-of-message-at-runtime-in-slf4j
> Reporter: Robert Elliot
> Assignee: SLF4J developers list
> Attachments: Util.java.patch
>
>
> It is occasionally useful to have a log method that takes a level as a
> parameter. The necessary methods can be added to the Util class without any
> compatibility issues as far as I can see - see attached patch.
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