4.  Log4J

When openjpa.Log is set to log4j, OpenJPA will delegate to Log4J for logging. In a standalone application, Log4J logging levels are controlled by a resource named log4j.properties , which should be available as a top-level resource (either at the top level of a jar file, or in the root of one of the CLASSPATH directories). When deploying to a web or EJB application server, Log4J configuration is often performed in a log4j.xml file instead of a properties file. For further details on configuring Log4J, please see the Log4J Manual. We present an example log4j.properties file below.

Example 3.4.  Standard Log4J Logging

log4j.rootCategory=WARN, console
log4j.category.openjpa.Tool=INFO
log4j.category.openjpa.Runtime=INFO
log4j.category.openjpa.Remote=WARN
log4j.category.openjpa.DataCache=WARN
log4j.category.openjpa.MetaData=WARN
log4j.category.openjpa.Enhance=WARN
log4j.category.openjpa.Query=WARN
log4j.category.openjpa.jdbc.SQL=WARN
log4j.category.openjpa.jdbc.SQLDiag=WARN
log4j.category.openjpa.jdbc.JDBC=WARN
log4j.category.openjpa.jdbc.Schema=WARN

log4j.appender.console=org.apache.log4j.ConsoleAppender