[jira] [Commented] (UIMA-5293) uv3 logging upgrade

["Marshall Schor (JIRA)" <de...@uima.apache.org>]

    [ https://issues.apache.org/jira/browse/UIMA-5293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15854878#comment-15854878 ] 

Marshall Schor commented on UIMA-5293:
--------------------------------------

Support was added in two styles for slf4j:  non-eclipse plugin style, and eclipse-plugin-style.
The non-plugin style: uimaj-core has dependencies on slf4j-api, slf4j-core (needed to set levels and other things), log4j 2  core and api (for current UIMA logging facade implementation).  These jars plus the binding for slf4j to log4j 2 jar are packaged to ship with the "binary" distribution of UIMA.

For the Eclipse plugin - the uimaj-ep-runtime plugin includes uimaj-core, which has the above 4 dependencies.  These are excluded using maven exclude statements; the runtime plugin instead has a OSGi dependency on "org.eclipse.m2e.logback.feature.feature.group"; this (not confirmed yet) is expected to supply the slf4j bindings and the logback backend for this, like it does for the m2e plugin.

The bundle instructions for the uimaj-ep-runtime were updated to specify the classes org.apache.logging.log4j* to be "optional".

> uv3 logging upgrade
> -------------------
>
>                 Key: UIMA-5293
>                 URL: https://issues.apache.org/jira/browse/UIMA-5293
>             Project: UIMA
>          Issue Type: Improvement
>          Components: Core Java Framework
>    Affects Versions: 3.0.0SDK-alpha
>            Reporter: Marshall Schor
>            Assignee: Marshall Schor
>            Priority: Minor
>             Fix For: 3.0.0SDK-beta
>
>
> Upgrade logging per discussion on dev mailing list, including upgrading existing log4j adapter to support log4j 2, and adding slf4j support.



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