public class TestLoggin {

	public static void main(String[] args) {

		PropertyConfigurator.configureAndWatch("log4j.properties",500);
		
		Log.security.info("Access denied: Username [ abonte ] ...");
		Log.performance.info("Log4j is too slow...");
		Log.business.fatal("Something went wrong ...");
		
		plop("coin");
		plop(5L,new Date());
	}

	public static void plop(String meuh) {}
	public static void plop(long l, Date d) {}
}



[business] TRACE - >> void com.bleh.TestLoggin.main(String[]) with [[Ljava.lang.String;@fe1feb]
[security] INFO - Access denied: Username [ abonte ] ...
[performance] INFO - Log4j is too slow...
[business] FATAL - Something went wrong ...
[business] TRACE - >> void com.bleh.TestLoggin.plop(String) with [coin] 
[performance] INFO - void com.bleh.TestLoggin.plop(String)      Duration 0 ms
[business] TRACE - << void com.bleh.TestLoggin.plop(String) with [coin] 
[business] TRACE - >> void com.bleh.TestLoggin.plop(long, Date) with [5, Wed May 30 14:23:34 CEST 2007]
[performance] INFO - void com.bleh.TestLoggin.plop(long, Date)  Duration 0 ms
[business] TRACE - << void com.bleh.TestLoggin.plop(long, Date) with [5, Wed May 30 14:23:34 CEST 2007]
[performance] INFO - void com.bleh.TestLoggin.main(String[])    Duration 15 ms
[business] TRACE - << void com.bleh.TestLoggin.main(String[]) with [[Ljava.lang.String;@fe1feb]



public aspect TraceAspect {

	pointcut publicMethods() : execution(public * **..*(..))
	&& !within(TraceAspect)
	&& !within(BenchmarkAspect);

	pointcut loggableCalls() : publicMethods();

	before() : loggableCalls() {
		Log.business.trace(">> " + buildLogInfo(thisJoinPoint));
	}

	after() : loggableCalls() {
		Log.business.trace("<< " + buildLogInfo(thisJoinPoint));
	}
	
	private String buildLogInfo(JoinPoint joinPoint) {
		Object [] args = joinPoint.getArgs() ; 
		return new StringBuilder(joinPoint.getSignature().toString())
		.append(" with ")
		.append( args.length == 0 ? "no args" :  Arrays.asList(joinPoint.getArgs()).toString() ).toString(); 
	}
}

public aspect BenchmarkAspect {
	
	private static Logger logger = Logger.getLogger("bench");
	
	pointcut publicMethods() : execution(public * **..*(..)); 
   	
    Object around() : publicMethods() {
        final long start = System.currentTimeMillis();
        try {
            return proceed();
        } finally {
            final long end = System.currentTimeMillis();
            Log.performance.info(thisJoinPoint.getSignature().toString()+"\tDuration "+(end-start)+" ms") ;
        }
    }

}