Log4j under OSGI (Eclipse RCP)

问题

After many tests i concluded that the Log4j is not working under OSGI.

I do not use Log4j directly, but i need third party plugins to log with it.

I made a plain JAVA project and everything works great, but under PLUGIN development nothing works.

I have log4j jar in my Classpath and even tried a Spring repository OSGI compliant Log4j and included it under Dependencies. Nothing works.

I've tried this some approach with no success: http://swik.net/Eclipse/Planet+Eclipse/Raja+Kannappan:+Eclipse+RCP+-+Converting+Dependencies+to+OSGi+Bundles/drqpf

and could not fully understand this one: http://www.eclipsezone.com/eclipse/forums/t99588.html

Can anyone point me on the right direction?

Thanks.

回答1:

You simply have to create log4j fragment bundle with the log4j.properties file inside.

UPDATE: Some things to look for:

• Header name should be: Fragment-Host: log4j.
• log4j.properties should be in the src folder.
• All the bundles which use log4j should have org.apache.log4j in their Import-Package attribute

回答2:

For logging in OSGi, you should take a look at OSGi Log Service. Here is article that explains quite well a good approach: http://blog.kornr.net/index.php/2008/12/18/osgi-logging-putting-it-all-together

You can also take a look at Pax-Logging: http://wiki.ops4j.org/display/paxlogging/Pax+Logging

来源：https://stackoverflow.com/questions/5150415/log4j-under-osgi-eclipse-rcp