Annotate your @Configuration class with @EnableAspectJAutoProxy(proxyTargetClass = true) You also have to add the following dependency: <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.7.2</version> </dependency>
With this Test @Aspect public class TestAspect { private static boolean runAround = true; public static void main(String[] args) { new TestAspect().hello(); runAround = false; new TestAspect().hello(); } public void hello() { System.err.println(“in hello”); } @After(“execution(void aspects.TestAspect.hello())”) public void afterHello(JoinPoint joinPoint) { System.err.println(“after ” + joinPoint); } @Around(“execution(void aspects.TestAspect.hello())”) public void aroundHello(ProceedingJoinPoint joinPoint) throws Throwable … Read more
I used Spring AOP for implementing logging so I share my observations: Performance impact is not sufficient, it is less than impact of logging itself Having aspects configured in Spring configuration, you are able to completely disable logging code if necessary Debugging becomes more problematic as stack traces become rather longer Such decision sufficiently affects … Read more
Presumably the “problem” is that it’s just logging that it’s returning a task – and you want the value within that task? Assuming that’s the case, you still have to return the task to the caller, immediately – without waiting for it to complete. If you break that, you’re fundamentally messing things up. However, before … Read more
I have created a simple aspect to capture the execution of public methods. The core of this AspectJ code is the pointcut definition: pointcut publicMethodExecuted(): execution(public * *(..)); Here we are capturing all public methods with any return type, on any package and any class, with any number of parameters. The advice execution could be … Read more
How about one of these alternatives? A) General execution pointcut with package restrictions: execution(* *(..)) && ( within(com.abc.xyz..controller..*) || within(com.abc.xyz..service..*) || within(com.abc.xyz..dao..*) ) B) Package-restricted execution pointcuts: execution(* com.abc.xyz..controller..*(..)) || execution(* com.abc.xyz..service..*(..)) || execution(* com.abc.xyz..dao..*(..)) I prefer B, by the way, just because it is a bit shorter and easier to read. As you have … Read more
Python does not need something like a “language extension” for being able to work in an Aspect Oriented way. That is simply due to the dynamic mechanisms in Python itself. A Google search will yield a couple projects – but despite looking merely like libraries, it is all that is needed in Python. I am … Read more
cflow helps you to advice the whole control flow. Let’s try an example, I have 4 small classes public class A { public static void methodA() { B.methodB(); } } public class B { public static void methodB() { C.methodC(); int a = 1; int b = 2; System.out.println( a + b ); } } … Read more
I would say AOP (Aspect Oriented Programming) is NOT a pattern by itself (and thus not a type of decorator pattern from my POV)… its implementation can be done via one or more patterns (including the use of decorator pattern)… AOP is a programming paradigm IMHO – other paradigms are for example OOP, functional programming … Read more
Logging is not a Service, it’s a cross-cutting concern. As such, it’s best implemented with a Decorator. However, adding lots of Decorators just to enable logging of various different services tend to violate DRY, in which case you can then further evolve those Decorators into a single Interceptor. While you can use IL weaving to … Read more