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From jdo-comm...@db.apache.org
Subject [Apache JDO Wiki] New: LoggingDetails
Date Thu, 10 Feb 2005 15:34:01 GMT
   Date: 2005-02-10T07:34:01
   Editor: MichaelBouschen
   Wiki: Apache JDO Wiki
   Page: LoggingDetails
   URL: http://wiki.apache.org/jdo/LoggingDetails

   Looging details

New Page:

= Logging =

The prototype (see version 2005-02-10 at SubversionRepository) replaces the proprietary logging
implementation in ri11 and tck11 by using the apache commons logging API. This removes the
Logger implementation in ri11 and its query and model specific subclasses. Now the implementation
classes in sub-projects ri11 and tck11 retrieve a logger instance by name and directly call
the logger methods as defined in the apache commons Log interface.

= Configuration =

Apache commons logging allows to switch between different logging implementations (including
JDK1.4 logging, Log4J and apache's simple logging implementation). We tested with JDK 1.4
logging and the apache simple logging. There are three properties files to configure logging:

||Properties file||Description||
||common-logging.properties||Specifies the logging implementation to use. It is tested with
JDK 1.4 logging and apache simple logging.||
||logging.properties||Logger configuration when using JDK 1.4 logging.||
||simplelog.properties||Logger configuration when using apache simple logging.||

= Logger Instances =

The ri11 sources use the following logger instances:

||org.apache.jdo.impl.fostore||File Object Store implementation||
||org.apache.jdo.impl.jdoql||JDOQL query runtime||
||org.apache.jdo.impl.jdoql.jdoqlc||JDOQL query compiler||
||org.apache.jdo.impl.model.jdo||JDOModel implementation||
||org.apache.jdo.impl.model.jdo.xml||XML parser for JDO metadata files||
||org.apache.jdo.impl.pm||PM and PMF implementation||
||org.apache.jdo.impl.sco||SCO implementation||
||org.apache.jdo.impl.state||State manager implementation||
||org.apache.jdo.store||Generic store manager implementation||
||org.apache.jdo.util||Utility classes||

The ri11 test classes use the following logger instance:
  org.apache.jdo.test

The tck11 test classes use the following logger instance:
  org.apache.jdo.tck

= Log Level =

The following describes the mapping between the log level of JDK 1.4 logging and apache commns
logging:

||JDK 1.4||Apache commons logging||
||FINEST||trace||
||FINE, FINER||debug||
||INFO, CONFIG||info||
||WARNING||warn||
||SEVERE||error, fatal||

The following table maps the log level of the former JDORI util.Logger class to apache commons
logging log level:

||JDORI Logger||Apache||
||TIME, BUF||trace||
||DEBUG, TEST||debug||
||INFO||info||
||WARN||warn||
||ERROR||error||

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