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package a.b.c;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
class Foo {
public void m() {
throw new RuntimeException("Hello World");
}
}
@Aspect
public class Real {
public static void main(String []argv) {
try {
new Foo().m();
} catch (Throwable t) {
System.out.println(t.getMessage());
}
}
@Pointcut("call(Throwable+.new(String, ..)) && this(caller) && args(exceptionMessage) && if()")
public static boolean exceptionInitializer(Object caller, String exceptionMessage) {
return isNdcEmpty();
}
@Around("exceptionInitializer(caller, exceptionMessage)")
public Object annotateException(ProceedingJoinPoint jp, Object caller, String exceptionMessage) {
System.out.println("advice running");
return jp.proceed(new Object[]{caller, "newmessage"});
}
private static boolean isNdcEmpty() {
return NDC.getDepth() == 0;
}
}
class NDC {
public static int getDepth() { return 0; }
}
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