Re: [aspectj-users] WeavingAdapter - how to use it?

[Andy Clement <andrew.clement@xxxxxxxxx>]

Glad to see you got it working.

There is an alternative way too. It involves defining a correct
weaving context that names the aspects and your options:

static class SimpleWeavingContext extends DefaultWeavingContext {

		public SimpleWeavingContext(ClassLoader loader) {
			super(loader);
		}

		@Override
		public List getDefinitions(ClassLoader loader, WeavingAdaptor adaptor) {
			List definitions = new ArrayList();
			Definition d = new Definition();
			d.getAspectClassNames().add("MonitorAspect");
			d.appendWeaverOptions("-Xjoinpoints:synchronization -debug");
			definitions.add(d);
			return definitions;
		}

	}


and then using the ClassLoaderWeavingAdaptor:

		byte[] bytes = readEntireInputStream(new FileInputStream("bin/Test.class"));
		URL[] aspects = getWeaversURL();
		URL[] classpath = getClasspathURL();
		URL[] realClasspath = new URL[aspects.length + classpath.length];
		System.arraycopy(aspects, 0, realClasspath, 0, aspects.length);
		System.arraycopy(classpath, 0, realClasspath, aspects.length,
classpath.length);
		URLClassLoader myClassLoader = new URLClassLoader(realClasspath,
ClassLoader.getSystemClassLoader());

		ClassLoaderWeavingAdaptor clwa = new ClassLoaderWeavingAdaptor();

		clwa.initialize(myClassLoader, new SimpleWeavingContext(myClassLoader));

		byte[] newBytes = clwa.weaveClass("test.Test", bytes, true);

However, it will only work with AspectJ 1.6.7 dev builds after today
because I needed to open up initialize() so it was public rather than
protected. And I've only just committed that change.

Andy


2009/11/21 Andrica Silviu <silviu.andrica@xxxxxxx>:
> Hi,
> Indeed I forgot :) And I did create a wrapper class around the
> WeavingAdaptor that sets the right permissions. The code is the following:
> Please find attached the code.
> It works brilliant as long as I don't instrument already loaded classes,
> through java.lang.Instrumentation.instrumentation.retransformClasses(...);
> or java.* classes, I don't exactly know. In this case, Java complains about
> not finding the aspect. I am currently exploring the use of
> -Xbootclassptah/p:<path_to_aspect>.
>
> Thanks for the replies.
> Best regards,
> Silviu
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