By default, OpenJPA uses a basic logging framework with the following output format:
millis diagnostic context level [thread name] channel - message
For example, when loading an application that uses OpenJPA, a message like the
following will be sent to the openjpa.Runtime channel:
2107 INFO [main] openjpa.Runtime - Starting OpenJPA 2.2.0
The default logging system accepts the following parameters:
File: The name of the file to log to, or stdout
or stderr to send messages to standard out and
standard error, respectively. By default, OpenJPA sends log messages to standard
error.
DefaultLevel: The default logging level of unconfigured
channels. Recognized values are TRACE, INFO, WARN, ERROR
and FATAL. Defaults to INFO.
DiagnosticContext: A string that will be prepended to all
log messages. If this is not supplied and an openjpa.Id
property value is available, that value will be used.
<channel>: Using the last token of the
logging channel name, you can
configure the log level to use for that channel. See the examples below.
Example 3.1. Standard OpenJPA Log Configuration
<property name="openjpa.Log" value="DefaultLevel=WARN, Runtime=INFO, Tool=INFO"/>
Example 3.2. Standard OpenJPA Log Configuration + All SQL Statements
<property name="openjpa.Log" value="DefaultLevel=WARN, Runtime=INFO, Tool=INFO, SQL=TRACE"/>
Example 3.3. Logging to a File
<property name="openjpa.Log" value="File=/tmp/org.apache.openjpa.log, DefaultLevel=WARN, Runtime=INFO, Tool=INFO"/>