Implements a sticky load balancer where a unique client ID String is requested from the {@link ClientRequestFacade} and used to keep track of whichservice was used last time and to use that if its possible and keep a cache of requests to
Implements a sticky load balancer using an {@link Expression} to calculatea correlation key to perform the sticky load balancing; rather like jsessionid in the web or JMSXGroupID in JMS.
@version $Revision: 1.1 $
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