/*
    who's advice should I take?
*/

public class afourth
{
    public void f() { System.out.println("f being executed"); }
    public static void main(String[] args)
    {
	afourth app = new afourth();
	app.f();
    }
}

aspect as1
{
    pointcut callf() : call(void afourth.f());

    /*
      ordering of advice execution is by the order in file 
    */
    before() : callf()
	{
	    System.out.println("as1 before advice2");
	}

    before() : callf()
	{
	    System.out.println("as1 before advice1");
	}
}

aspect as2
{
    pointcut callf() : call(void afourth.f());

    before() : callf()
	{
	    System.out.println("as2 before advice");
	}
}

aspect controllingaspect 
{
    declare precedence : as1, as2; // as1's advice has precedence
    // declare precedence as1,*; // give precedence to as1 over other aspects
}

/* conflicting precedence declarations won't compile...
aspect c2
{
    declare precedence : as2, as1; 
}
*/