log4j.rootLogger=DEBUG, ConsoleAppender log4j.appender.ConsoleAppender=org.apache.log4j.ConsoleAppender log4j.appender.ConsoleAppender.layout=org.apache.log4j.PatternLayout log4j.appender.ConsoleAppender.layout.ConversionPattern=%-5p %c{1} - %m%n log4j.appender.FileAppender=org.apache.log4j.RollingFileAppender log4j.appender.FileAppender.File=logs/application.log log4j.appender.FileAppender.MaxFileSize=10MB log4j.appender.FileAppender.MaxBackupIndex=5 log4j.appender.FileAppender.layout=org.apache.log4j.PatternLayout log4j.appender.FileAppender.layout.ConversionPattern=%-5p %d [%t] %c{1} - %m%n import org.ops4j.pax.logging.PaxLoggingService; import org.ops4j.pax.logging.PaxLoggingServiceFactory; import org.ops4j.pax.logging.PaxLogger; public class MyApp { private static PaxLoggingService loggingService; public static void main(String[] args) { loggingService = PaxLoggingServiceFactory.getPaxLoggingService(); PaxLogger logger = loggingService.getLogger(MyApp.class.getName()); logger.info("Hello World!"); // ... } }