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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 edited comment on UIMA-5293 at 2/27/17 5:56 PM:
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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
the built-in java.util.logging package are included 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 uses the normal OSGi dependency
resolution mechanism to hook up a back end.
The superclass for Annotators (AnalysisComponent_ImplBase) was updated to
include a getLogger() which is just a shortcut for getContext().getLogger().
The UIMA Logger interface was extended to include the SLF4j API plus the Java 8
style calls from log4j-2.
The factory config was changed to use the slf4j as the normal implementation.
This implementation checks to see SLF4j is hooked up to either
java.util.logging or log4j, and if so, it switches to directly hook up the UIMA
facade to those back ends.
was (Author: schor):
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-alpha02
>
>
> 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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