Message Multicaster.
Used to send a message to a recipient list, or a subset of that recipient list.
Caches a {@link ServiceInvoker} instance for each recipient.
Note: This doesn't "multicast" message delivery in the true IP sense of the word "multicast". It sends the message to all recipients in its recipient list, one at a time, in the order the recipients were added via the {@link #addRecipient(org.jboss.soa.esb.Service)} method.
@author
tom.fennelly@jboss.com