LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
		
SiftingAppender siftingAppender = new SiftingAppender();
siftingAppender.setContext(loggerContext);
siftingAppender.setName("SIFTING_APPENDER");
		
MDCBasedDiscriminator discriminator = new MDCBasedDiscriminator();
discriminator.setKey("SIFT_KEY");
discriminator.setDefaultValue("SIFT_KEY_DEF");
discriminator.start();
siftingAppender.setDiscriminator(discriminator);

siftingAppender.setAppenderFactory(new AppenderFactory<ILoggingEvent>() {

	@Override
	public Appender<ILoggingEvent> buildAppender(Context context, String discriminatingValue) throws JoranException {

		RollingFileAppender<ILoggingEvent> appender = new RollingFileAppender<>();
		appender.setName("ROLLING_APPENDER_"+discriminatingValue);
		appender.setContext(context);
		appender.setFile("/var/log/activeLog_"+discriminatingValue+".log");

		TimeBasedRollingPolicy<ILoggingEvent> policy = new TimeBasedRollingPolicy<>();
		policy.setContext(context);
		policy.setMaxHistory(2);
		policy.setFileNamePattern("/var/log/archivedLog_"+discriminatingValue+"_%d{yyyy_MM_dd_HH_mm}_%i.log");
		policy.setParent(appender);
		policy.setCleanHistoryOnStart(true);

		SizeAndTimeBasedFNATP<ILoggingEvent> innerpolicy = new SizeAndTimeBasedFNATP<>();
		innerpolicy.setContext(context);
		innerpolicy.setMaxFileSize("5KB");
		innerpolicy.setTimeBasedRollingPolicy(policy);

		policy.setTimeBasedFileNamingAndTriggeringPolicy(innerpolicy);
		policy.start();
		
		appender.setRollingPolicy(policy);

		PatternLayoutEncoder pattern = new PatternLayoutEncoder();
		pattern.setContext(context);
		pattern.setPattern("%d{yyyy/MM/dd'T'HH:mm:ss} %-5level - %msg\n");
		pattern.start();
		
		appender.setEncoder(pattern);
		appender.start();
		return appender;
	
	}

});
siftingAppender.start();

ch.qos.logback.classic.Logger logger = (ch.qos.logback.classic.Logger)LoggerFactory.getLogger("org.test");
logger.addAppender(siftingAppender);
logger.setLevel(Level.DEBUG);
logger.setAdditive(false); /* set to true if root should log too */

//for (int i=0 ; i<100 ; i++) {

	MDC.put("SIFT_KEY", "SIFTED1");
	logger.info("bla11.........................");
	logger.info("bla12.........................");
	logger.info("bla13.........................");
	MDC.clear();
		
	MDC.put("SIFT_KEY", "SIFTED2");
	logger.info("bla21.........................");
	logger.info("bla22.........................");
	logger.info("bla23.........................");
	MDC.clear();

//}