AspectJ - Creating a global Logger field using an Inter-Type Declaration

Question

I\'d like to create an Inter-Type declaration that declares a (static final) Logger instance inside each class.

The constructor should be passed the enclosing class

Answer 1

This answer gives the correct solution, posted below for convenience. Additionally it uses AspectJ annotations which is the preferred notation nowadays.

The developers recently added the annotation API, I presume with the intention of standardising the markup as many other popular libraries like Spring are also doing.

@Aspect("pertypewithin(com.something.*))")
public abstract class TraceAspect {

    Logger logger;

    @Pointcut
    public abstract void traced();

    @Pointcut("staticinitialization(*)")
    public void staticInit() {
    }

    @After(value = "staticInit()")
    public void initLogger(JoinPoint.StaticPart jps) {
        logger = Logger.getLogger(jps.getSignature().getDeclaringTypeName());
    }

    @Before(value = "traced()")
    public void traceThatOne(JoinPoint.StaticPart jps) {
        logger.log(jps.getSignature().getName());
    }
}