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