EclipseLink/Examples/Foundation/Logging

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How do I integrate with a third party logging framework

EclipseLink's default logging is based on Java (1.4 an higher) java.util.logging but is also extensible to allow other logging frameworks to be used.

Contents


This how-to example will illustrate how other logging solutions such as Log4J and Apache common logging can be easily used with EclipseLink.

References

How to configure a custom logger in JPA

Logging Extension Basics

Customizing EclipseLink to use another logging framework or integrate with an existing logging infrastructure involves:

  1. Implementing your own SessionLog
  2. Configuring the use of your SessionLog

Using Log4J

An eclipselink bug report exists for that point : https://bugs.eclipse.org/bugs/show_bug.cgi?id=232240

It deals about apache commons Logging 1.1 & Log4J integration with eclipseLink 1.0 (so 1.1 should be supported too).

How to use Log4J :

- add apache commons logging 1.1 & log4J libraries in your classpath

- add the sample log4.xml in your classpath : https://bugs.eclipse.org/bugs/attachment.cgi?id=103596

- add the following class in the org.eclipse.persistence.logging package of your own project : https://bugs.eclipse.org/bugs/attachment.cgi?id=104821

- add the following lines to your persistence.xml :

<property name="eclipselink.logging.logger" value="org.eclipse.persistence.logging.CommonsLoggingSessionLog"/>


- Compile & deploy your code : that's done.


About log4J levels & eclipselink log levels :

Of course, you should check that the log4J level for the org.eclipse.persistence logger (and your root logger and appenders) is compatible with the eclipselink.logging.level.

For example, in log4j.xml :

 <logger name="org.eclipse.persistence">
   <level value="info"/>
 </logger>

In persistence.xml :


eclipselink.logging.level = SEVERE


Change Log levels at runtime : As you may not know, log4J levels can be changed at runtime for debug purposes :

 see the CommonsLoggingSessionLog#setLevel() method :
 /**
* PUBLIC:

Set the lw lev to a logger with name space extracted from the given category.

  *
  * @param level
  * @param category
  */
 @Override
 public void setLevel(final int level, final String category)

Using Apache Commons Logging

UNDER CONSTRUCTION