wsdl2java generated client transport method

[Wolfram Ditzer]

Hello,

I use classes created by WSDL2Java an d wsdl file.  My aim is to build a 
client for a web service.

String serviceName = ...
Url myAppUrl = ...
Service service = new Service();
MyAppServerStub myAppServer = new MyAppServerStub(myAppUrl, service);
myAppServer.setPortName(serviceName);
DataType1 dat1 ...
DataType2 dat2 ...
DataType3 dat3 ...
dat3 = myAppServer.requestFoo(dat1, dat2)
 This seems to run. But I still have some questions:
1) How to change the Transport classes. I have to use a connection pool, 
when createing and removing TCP connections.
       I could change with

     Call call = ... ????
     call.addTransportPackage(..)
     call.addTransportForProtocoll(..)
 But how to get the Call object?

2) What could I do with a client wsdd-file? I didnīt understand this?

Thank you in advance Wolfram