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https://issues.apache.org/jira/browse/OPENJPA-10?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12469345
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Patrick Linskey commented on OPENJPA-10:
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Resolved with 475084
> persistence unit name should be default diagnostic context for standard
> OpenJPA log impl
> ----------------------------------------------------------------------------------------
>
> Key: OPENJPA-10
> URL: https://issues.apache.org/jira/browse/OPENJPA-10
> Project: OpenJPA
> Issue Type: Improvement
> Reporter: Patrick Linskey
> Priority: Minor
>
> OpenJPA's default logging implementation has a concept of a diagnostic
> context, roughly stolen from log4j. The basic idea is that in a configuration
> file, the user can specify a diagnostic context string that will be printed
> out with each log message. The result is that if a user has multiple
> EntityManagerFactories running in the same JVM, she can distinguish between
> the different logging outputs, even if they all just go to stderr.
> The JPA spec requires that persistence units are named uniquely. This
> presents us with an opportunity: we could check for the existence of multiple
> EMFs and, if found and the user did not specify a diagnostic context,
> automatically set the logging diagnostic context based on the name of the
> persistence unit.
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