2.3. Pax Logging API import org.ops4j.pax.logging.Logger; import org.ops4j.pax.logging.LoggerFactory; public class MyClass { private static final Logger logger = LoggerFactory.getLogger(MyClass.class); public void myMethod() { logger.debug("Debug message"); logger.info("Info message"); logger.warn("Warning message"); logger.error("Error message"); } }