TurboFilters should be called with format/params/throwable when using fluent logging API

[christophejan]

I think TurboFilter decide method should be called with provided format/params/throwable the same way whether fluent logging API has been used or not.

Currently, with slf4j-api 2.0.16 and logback-classic 1.5.8 :

• logger.info(“Hello world.”); call TurboFilter decide method with provided format/params/throwable
• logger.atInfo().log(“Hello world.”); never call TurboFilter decide with provided format/params/throwable (A call equivalent to logger.isInfoEnabled() with null format/params/throwable is done ; that’s not a problem but that’s not what is expected).

In logback documentation, I found :

• On Fluent Logging API : The statement logger.atInfo().log(“Hello world.”); is equivalent to : logger.info(“Hello world.”);
• […] (TurboFilter) are called not only when a given appender is used, but each and every time a logging request is issued. Their scope is wider than appender-attached filters.

I think it’s an issue that TurboFilters is not called with format/params/throwable when using fluent logging API.

[jakobleck]

+1 I had an issue trying to filter logs using a TurboFilter based on matching the format with a specific string and returning a DENY, but in the resulting logs in the console the string still appeared, presumably from calls to decide with format = null. Adding a

    if (format == null) {
      return FilterReply.DENY;
    }

to the decide fixed it, but doesn't look that good to me... (Or is it?)

At the very least, I think, it should be documented that TurboFilter's decide can be called with null parameters.