@Override
public void build() {
if (requestHandlers != null && targetInterceptorChainHead != null) {
// on target-side, connect existing handlers and interceptors
MessageHandler messageDispatcher = new MessageDispatcher(targetInterceptorChainHead);
requestHandlers.add(messageDispatcher);
}
if (requestHandlers != null) {
MessageChannel requestChannel = new MessageChannelImpl(requestHandlers);