accessing interceptor members from another interceptor

Hey guys, 

i have a question about inter-interceptor communication. lets say we
have a interceptor A and B. B needs to access variable that are set and
available at interceptor A. what are the recommended ways of
passing/reading/accessing data that are in another interceptor in an
invocation chain? 

i have two ways right now.
1. Use a special State Mixin that holds shared data among interceptors
and other Mixin..

in interceptor A
	StateMixin sm = (StateMixin) invocation.getProxy();
	sm.setTransactionId (txId);

then in interceptor B
	StateMixin sm = (StateMixin) invocation.getProxy();
	long txId = sm.getTransactionId ());


2. Each interceptor should keep its own specific data. if they need to
access some other interceptor's data, they need to get a hold on that
interceptor first, and then access its variables. Example.

in interceptor A
	setTransactionId (txnId);


then in Interceptor B .. 
	A a = (A) invocation.getInterceptorNamed("a");
	a.getTransactionId();


what do you guys think about this? please be as verbose as you can..







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