These modules are usable on any JSR-299 implementation, not just Weld!

Adding logging to your application is now even easier with simple injection of a logger object into any CDI bean. Simply create an injection point of type org.slf4j.Logger and an appropriate logger object will be injected into any instance of the bean. The example shows how objects can be interpolated into a message. If you use this approach, you do not need to surround a call to the logger with a condition like if ( log.isDebugEnabled() ) to avoid string concatenation. You can add Weld logging to your project by including weld-logger.jar, sl4j-api.jar and sl4j-jdk14.jar to your project. Alternatively, express a dependency on the org.jboss.weld:weld-logger Maven artifact. If you are using Weld as your JSR-299 implementation, there's no need to include sl4j as it's already included (and used internally).