You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@uima.apache.org by "Michael Baessler (JIRA)" <ui...@incubator.apache.org> on 2007/02/07 11:13:05 UTC
[jira] Commented: (UIMA-282) Work well with Apache logging (Log4J)
[ https://issues.apache.org/jira/browse/UIMA-282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12470884 ]
Michael Baessler commented on UIMA-282:
---------------------------------------
Some comments about this issue.
UIMA internally don't use java.util.logging. UIMA has defined it's own logging architecture that fits most of the available Java logging architectures. So internally we use our own classes which can be wrapped to the Java logging system of your choice. The default wrapper we currently use is a wrapper for JSR47, but this can easily be changed to e.g. Log4J. You just have to provide the wrapper implementation and change the configuration settings that specifies which wrapper should be used.
The UIMA logging interface that is used internally is: org.apache.uima.util.Logger
The JSR47 wrapper implementation is: org.apache.uima.util.impl.JSR47Logger_impl
The configuration which log wrapper should be used is available in: org.apache.uima.impl.factoryConfig.xml
There is a configuration setting like: <logger class="org.apache.uima.util.impl.JSR47Logger_impl"/> that must be changed to the new Log4J logger implementation.
So you see, it is not much effort to provide a log wrapper for Log4J. Maybe we can work together and provide such a logger implementation that implements the UIMA logging interface and uses Log4J as logging system, similar to the JSR47Logger_impl.
What do you think?
> Work well with Apache logging (Log4J)
> -------------------------------------
>
> Key: UIMA-282
> URL: https://issues.apache.org/jira/browse/UIMA-282
> Project: UIMA
> Issue Type: Wish
> Reporter: Greg Holmberg
> Priority: Minor
>
> UIMA uses the standard java.util.logging (JUL). Most of my company's code used Apache Log4J, so we have a problem merging the messages from the two logging packages. Given that UIMA is now an Apache project, I think it makes sense that it work with Apache logging.
> Two options occur to me:
> 1. Change all the logging calls in the code (perhaps Eclipse refactoring tools can help with that). Here's some discussion on migrating: http://www.oreillynet.com/onjava/blog/2005/12/migrating_from_jdk_logging_to.html
> You could convert either to Log4J ( http://logging.apache.org/log4j/docs ) or to Apache Jakarta Commons Logging ( http://jakarta.apache.org/commons/logging ), which would allow UIMA to be configured to use either JUL or Log4J.
> 2. Write/find a JUL Handler that re-directs to Log4J. Here's an example: http://home.gwu.edu/~amrinder/chainsawHandler/UsingChainsawWithJDKLogging.html
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
Re: [jira] Commented: (UIMA-282) Work well with Apache logging (Log4J)
Posted by Marshall Schor <ms...@schor.com>.
Michael Baessler (JIRA) wrote:
> [ https://issues.apache.org/jira/browse/UIMA-282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12470884 ]
>
> Michael Baessler commented on UIMA-282:
> ---------------------------------------
>
> Some comments about this issue.
>
> UIMA internally don't use java.util.logging. UIMA has defined it's own logging architecture that fits most of the available Java logging architectures. So internally we use our own classes which can be wrapped to the Java logging system of your choice. The default wrapper we currently use is a wrapper for JSR47, but this can easily be changed to e.g. Log4J. You just have to provide the wrapper implementation and change the configuration settings that specifies which wrapper should be used.
>
> The UIMA logging interface that is used internally is: org.apache.uima.util.Logger
>
> The JSR47 wrapper implementation is: org.apache.uima.util.impl.JSR47Logger_impl
>
> The configuration which log wrapper should be used is available in: org.apache.uima.impl.factoryConfig.xml
> There is a configuration setting like: <logger class="org.apache.uima.util.impl.JSR47Logger_impl"/> that must be changed to the new Log4J logger implementation.
>
> So you see, it is not much effort to provide a log wrapper for Log4J. Maybe we can work together and provide such a logger implementation that implements the UIMA logging interface and uses Log4J as logging system, similar to the JSR47Logger_impl.
> What do you think?
>
+1. Greg - I would encourage you to write such a wrapper and contribute
it. :-)
-Marshall