code: private EndPointInfoImpl updateEndpointMBean(String name, String host, int port) {
          EndPointInfoImpl existingEP = endpoints.get(name);
          existingEP.updateHost(host);
          existingEP.updatePort(port);
          return existingEP;
      }
docs: Update an existing endpoint MBean, which will emit change notifications.
  
  @param name The name of the EndPoint which was updated
  @param host The current host value (may or may not have changed)
  @param port The current port value (may or may not have changed)