I'm using "JBoss (MX MicroKernel) [4.0.1 (build: CVSTag=JBoss_4_0_1 date=200501141152)]", and the version of JBoss AOP that comes as part of that deployment.
I have created some pointcuts that attached methods to the constructor, for example
<prepare expr="execution(public org.jaffa.applications.jaffa.modules.admin.components.usermaintenance.ui.*->new(..))"/>
I have enabled runtime aspect injection via the setting
< attribute name ="EnableTransformer" >true< /attribute > Everything works fine, the interceptors are correctly bound to the methods, but i have a problem with interceptors not being invoked for the constructor. I believe this is because I use a Factory pattern for constructing new instance of my object via the clazz.newInstance().
If I hard code the new Class() constructor, JBoss will replace it with the correct call to an injected public static method to invoke the constructor interceptors and create the object.
Can I therefore assume that to use JBoss AOP on constructors all object factories must be re-written to call this new public static method, if the class being constructed implements the Advised interface?
Original Factory Code...
Component compInst = (Component) clazz.newInstance();
New Factory Code to be JBoss AOP complient...
Component compInst = null;
// Use the Advised static method to create the object if needed.
if(clazz instanceof Advised) {
String name = clazz.getName().substring(clazz.getName().lastIndexOf('.')) + "_new_$aop";
Method method = clazz.getDeclaredMethods(name, new Class[0]);
compInst = method.invoke(null, new Object[0]);
}
if(compInst==null)
compInst = clazz.newInstance();
Am I missing something here, as this seems very intrusive, expecially if i now need to go and modify the likes of Struts so i can bind aspects to the creation of a FormBean?
I'm sure you must address similar issues in Hibernate when creating new objects that may have constructor interceptor stacks?
Please advise....
PaulE
(
http://jaffa.sf.net)
