How to configure a logger type in TopLink Essentials (Part 2)
Previously I bloged about How to use Java Logger in Java SE mode - a workaround to change logger type. But the workaround is no more needed. GlassFish v2(from b17) implemented a new feature - the configuration for logger type for this.
It's very easy to use Java logger in Java SE mode, just add following property to persistence.xml.
<property name="toplink.logging.logger" value="JavaLogger"/>
Or you can do it programatically like below.
Map properties = new HashMap();
EntityManagerFactory emf = Persistence.createEntityManagerFactory("your-unit-name", properties);
Valid values are one of the following or custom class name which implements oracle.toplink.essentials.logging.SessionLog.
* DefaultLogger - internal default logger(Standard out).
* JavaLogger - Java logger.
In Java EE environment, this property is normally not required because AppServers such as GlassFish is already using JavaLogger by implciticly adding ServerPlatform("toplink.target-server" or "toplink.server.platform.class.name") property. But if you specify "toplink.logging.logger" property then it will override the ServerPlatform's logger configuration.
Implementing a new logger type or extending existing logger
Currently there are just two logger types.
But you can add a new logger type if you need a different type of logger(such as log4j).
To implement acustom logger make a logger class by implementing oracle.toplink.essentials.logging.SessionLog or extending oracle.toplink.essentials.logging.AbstractSessionLog. And put the class name on the logger type property.
<property name="toplink.logging.logger" value="your-logger-class-name"/>
See oracle.toplink.essentials.logging.JavaLog source for reference.
If you want a special kind of logger, consider extending existing logger. You may be able to implement a logger which handles SQL log specially - see SessionLog's SQL category.
Make your own logger and if it is useful for others, please contribute by sending it to firstname.lastname@example.org !