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From "Patrick Linskey (JIRA)" <j...@apache.org>
Subject [jira] Created: (OPENJPA-10) persistence unit name should be default diagnostic context for standard OpenJPA log impl
Date Thu, 10 Aug 2006 01:34:15 GMT
persistence unit name should be default diagnostic context for standard OpenJPA log impl
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                 Key: OPENJPA-10
                 URL: http://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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