How to track data exchange

Question

Hi All,
I am working on a load generator application where i record client interactions(request and response objects) in XML serialized form.
Now i want to replay those recorded stuff. I am able to replay simple
calls(requests) using reflection APIs.
But the problem comes when i have to use data returned by one call in a later stage in another call. So there should be some mechanism to track data
exchange while recording and use this tracking mechanism while replaying?
I think might be i need some HashMap type structure but not sure !:)

Answer 1

Thanks Roy.
JMeter deals with Web Applications but not ejb application clients
I have recorded ejb calls in XML serialized form. When i was going to replay those recorded scenarios, i found a very
big problem. The problem is divided into 3 cases:
/*Case1:*/
Var x = func1.a ();
…. // Some intermediate statements
func2.b (a, b, x);
/*Case2:*/
func2.b(a, func1.a(), b);
/*Case3:*/
Var x = func1.a();
…. // Some intermediate statements
Variable x is updated
func2.b(a, b, x);During replay of those recorded calls
You can see the values returned by func1 call(it was already recorded) have
been used in func2(this call is already been recorded) in 3 different ways.
I have to find these correlations during runtime (replaying of those recorded calls) and have to pass these dynamic values returned by func1 to func2 instead of those values which are in recorded script.