Re: [aspectj-users] cflow below problem

["Marco Mistroni" <mmistroni@xxxxxxxxx>]

Hello andy,
 thanks for your reply..
actually i was meaning i want to intercept the getObject calls in all cases
except when it is called in the flow of updateStatus()..

will cflow intercept it, even if getObject is not called DIRECTLY from updateStatus, but
it is called via getChildren which is being called via updateStatus()?

i will try again tomorrow and see, maybe i have set up incorrectly the && ..

thanks and regards
 marco

On 5/24/06, Andy Clement <andrew.clement@xxxxxxxxx> wrote:

You appear to have a rogue '!' in your pointcut.

> pointcut updateStatus() :
>      execution(* com.beanX.updateStatus(..));
"execution of the updateStatus method"


> public pointcut getObject() :
>         execution (MyObject com.MyComponent.*(..))
>         && !(cflow(updateStatus()));
"execution of a method in the MyComponent type that returns a MyObject
instance unless in the control flow of an updateStatus method"

when your description says:

> what i want do do is to intercept the call to component.getOBject() OLNLY
> when is in the workflow of the call (or the execution)
> of updateStatus

so your second pointcut should be:

> public pointcut getObject() :
>         execution (MyObject com.MyComponent.*(..))
>         && cflow(updateStatus());
"execution of a method in the MyComponent type that returns a MyObject
instance when in the control flow of an updateStatus method"

Here is a program
======8<========
class BeanX {

  MyComponent component = new MyComponent();

  public void updateStatus() {
    getChildrens();
  }

  public void getChildrens() {
    MyObject objs = component.getObject();
  }
}


class MyObject {}
class MyComponent { public MyObject getObject() { return new MyObject(); }}


public aspect X {

  pointcut updateStatus(): execution(* BeanX.updateStatus(..));

  public pointcut getObject() :
        execution (MyObject MyComponent.*(..))
        && (cflow(updateStatus()));

  before(): getObject() {
    System.err.println("getObject running in the control flow of updateStatus");
  }

  public static void main(String[]argv) {
    BeanX bx = new BeanX();
     bx.getChildrens(); // advice doesnt run
    bx.updateStatus(); // advice runs
  }
}
======8<========

In the main() method there is a call directly to getChildrens() which
doesnt get advised (the getObject() won't be in the control flow of
updateStatus()) and then there is a call to updateStatus() which will
cause getObject() to be called in the control flow you are looking
for.

Andy.


On 24/05/06, Marco Mistroni < mmistroni@xxxxxxxxx> wrote:
> hi all,
>  i have following problem
>
> i have following bean
>
> beanX {
>
>    public void updateStatus() {
>          getChildrens();
>    }
>
>
>    public void getChildrens() {
>          MyObject objs = component.getObject();
>   }
> }
>
>
> what i want do do is to intercept the call to component.getOBject () OLNLY
> when is in the workflow of the call (or the execution)
> of updateStatus
>
> i have written the following pointcut (which obviously is not working.)...
> what am i missing?
>
>
> pointcut updateStatus() :
>      execution(* com.beanX.updateStatus(..));
>
>
> public pointcut getObject() :
>         execution (MyObject com.MyComponent.*(..))
>         && !(cflow(updateStatus()));
>
>
> is there something that i am missing?
>
> thanks and regards
>    marco
>
>
>
>
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