Hi there I have a custom spring app I need to setup an access log for. I'm needing it in W3C format for reporting purposes. I'm porting it to logback from log4j because the server the application is in is now using it. How is it possible to create a custom logger with custom log level methods, a custom level class with levels higher than FATAL so it doesnt get mixed up with the root logger. Im also needing to create it all programatically so setup the logger when requested because i need to produce a logger for each context path in the spring app so i get a different log file for each context. Issue ive experienced so far porting my code is that the layout, rollingpolicy and appender all need contexts set to it or else it complains about no context set ? I'm also needing to work out how it would be possible to create a custom even / layout / pattern convertor to obtain particular statistical details from the server similar to the implementations for tomcat and jetty though its a video server and not sure if its running in a servlet as such. Ive worked out so far there is possibilities to add fields set in the MDC to the file header aswell as in the pattern string for the file appender. As of now no log file is being set. Here is the code so far. MDC.put("x-event", "stop"); MDC.put("x-category", "stream"); logStats = (Logger)LoggerFactory.getLogger(loggerName); if (null == logStats.getAppender(appenderName)) { layout = new PatternLayout(); layout.setPattern("%X{x-event} %X{x-category} - %msg%n"); layout.setFileHeader("x-event \t x-category"); layout.setContext(logStats.getLoggerContext()); layout.start(); appender = new RollingFileAppender(); policy = new TimeBasedRollingPolicy(); policy.setContext(logStats.getLoggerContext()); policy.start(); appender.setContext(logStats.getLoggerContext()); appender.setName(appenderName); appender.setLayout(layout); policy.setFileNamePattern(path + logFilePattern); appender.setRollingPolicy(policy); appender.start(); logStats.addAppender(appender); } Currently I have to call logStats.error("stop"); In my log4j class it was logStats.stop("message"); which present the stop level inside it, but cant find and implementation to subclass as yet. Let me know thanks.