// The invocation must happen in a separate thread, holding on the afterCompletion
// blocks other operations that could have been listed there as well.
_executorService.submit(new Callable<Object>() {
public Object call() throws Exception {
try {
operationClient.execute(true);
MessageContext response = operationClient.getMessageContext(WSDLConstants.MESSAGE_LABEL_IN_VALUE);
MessageContext flt = operationClient.getMessageContext(WSDLConstants.MESSAGE_LABEL_FAULT_VALUE);
if (response != null && __log.isDebugEnabled())
__log.debug("Service response:\n" + response.getEnvelope().toString());