log4j.rootLogger=INFO, stdout log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.Target=System.out log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n import org.ops4j.pax.logging.Logger; import org.ops4j.pax.logging.PaxLoggingService; import org.osgi.service.log.LogService; public class MyClass { private Logger logger; public MyClass(PaxLoggingService paxLoggingService) { logger = paxLoggingService.getLogger(getClass()); } public void doSomething() { logger.info("This is an info message."); logger.warn("This is a warning message."); logger.error("This is an error message."); } public static void main(String[] args) { PaxLoggingService paxLoggingService = MyPaxLoggingServiceProvider.getPaxLoggingService(); MyClass myClass = new MyClass(paxLoggingService); myClass.doSomething(); } }