[Hawkular-dev] [Metrics] HWKMETRICS-125 Use JBoss Logging as in all other Hawkular components

Hi, I created a pull request for $subject. https://github.com/hawkular/hawkular-metrics/pull/352 I'm writing to share some implementation details. I followed some Hawkular wide conventions (which I gathered from mailing list threads, so tell me if it's wrong): - put logging stuff into a 'log' package - in the message logger interface, method names should start with the log level [1] - logger instances should be named 'log' [2] - only put messages which need an id (level INFO and above) in logger interfaces [3] I tried to draw up some Metrics specific conventions (some may not be specific, I just found no mention of them in the threads): - group all messages in one class for maintainability [4] - instead of creating a logger instance in the message logger interface, use XXXLogging helper class to get a logger instance with proper category (inspired by what Hibernate does) [5] - use existing message logger instance to log trace/debug messages instead of creating a separate logger instance [6] The logging 'projectCode' is 'HAWKMETRICS'. Does that fit everyone? Note that until we no longer need to support EAP 6.4, we must not use primitive arguments in logging interfaces. [7] Also, logback is now the logging backend for tests. It allows to set log level with a system property while still having a default value. [8][9] No Maven filtering/replace dance involved. If there's no issue with all of the above, then maybe we should not wait too long before merging, because a bunch of files are impacted. Thanks, Thomas [1] https://github.com/hawkular/hawkular-metrics/pull/352/files#diff-75a85495... [2] https://github.com/hawkular/hawkular-metrics/pull/352/files#diff-26d97c76... [3] https://github.com/hawkular/hawkular-metrics/pull/352/files#diff-1354be09... [4] https://github.com/hawkular/hawkular-metrics/pull/352/files#diff-75a85495... [5] https://github.com/hawkular/hawkular-metrics/pull/352/files#diff-fb0691f5... [6] https://github.com/hawkular/hawkular-metrics/pull/352/files#diff-04e1ad2a... [7] http://lists.jboss.org/pipermail/hawkular-dev/2015-March/000378.html [8] https://github.com/hawkular/hawkular-metrics/pull/352/files#diff-e0d878a7... [9] https://github.com/hawkular/hawkular-metrics/pull/352/files#diff-e0d878a7...