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POModifying parameters in more than one aspect providing around advice
 

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  1. POModifying parameters in more than one aspect providing around advice
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    <p>I have two aspects each of which modify method arguments. When both aspects are applied to the same method, I would expect execution of the aspects to be chained and I would expect that the arguments modified in the first aspect to be available to the second aspect via <code>joinPoint.getArgs();</code> However, it appears that each aspect gets only the original arguments; the second aspect never sees the modified values. I've contrived an example:</p> <p>The test class:</p> <pre><code>public class AspectTest extends TestCase { @Moo private void foo(String boo, String foo) { System.out.println(boo + foo); } public void testAspect() { foo("You should", " never see this"); } } </code></pre> <p>The method foo() is advised by two aspects:</p> <pre><code>@Aspect public class MooImpl { @Pointcut("execution(@Moo * *(..))") public void methodPointcut() {} @Around("methodPointcut()") public Object afterMethodInControllerClass(ProceedingJoinPoint joinPoint) throws Throwable { System.out.println("MooImpl is being called"); Object[] args = joinPoint.getArgs(); args[0] = "don't"; return joinPoint.proceed(args); } } </code></pre> <p>and...</p> <pre><code>@Aspect public class DoubleMooImpl { @Pointcut("execution(@Moo * *(..))") public void methodPointcut() {} @Around("methodPointcut()") public Object afterMethodInControllerClass(ProceedingJoinPoint joinPoint) throws Throwable { System.out.println("DoubleMooImpl is being called"); Object[] args = joinPoint.getArgs(); args[1] = " run and hide"; return joinPoint.proceed(args); } } </code></pre> <p>I would expect the output to be:</p> <pre><code>MooImpl is being called DoubleMooImpl is being called don't run and hide </code></pre> <p>...but is:</p> <pre><code>MooImpl is being called DoubleMooImpl is being called You should run and hide </code></pre> <p>Am I using the correct approach to modify arguments via around advice?</p>
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    1. USJava Junky
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    1. COPlease subscribe to the AspectJ users mailing list and ask your question there. You should get a competent answer there. I would be interested in the outcome too.
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      1. USkriegaex
 

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