code: public void handleResponse(String response) {
          if (messageListener != null) {
              log.debug("Sending Http response");
              messageListener.onOutboundMessage(new RawMessage(response), null);
          } else {
              if (log.isDebugEnabled()) {
                  log.debug("Sending Http response:" + NEWLINE + response);
              }
          }
      }
docs: Handle response message and write content to logger.
  @param response