code: protected boolean hasTimeStampHeader() {
          String originTime = request.getHeader(RestMessageHeaders.X_VOLD_REQUEST_ORIGIN_TIME_MS);
          boolean result = false;
          if(originTime != null) {
              try {
                  // TODO: remove the originTime field from request header,
                  // because coordinator should not accept the request origin time
                  // from the client.. In this commit, we only changed
                  // "this.parsedRequestOriginTimeInMs" from
                  // "Long.parseLong(originTime)" to current system time,
                  // The reason that we did not remove the field from request
                  // header right now, is because this commit is a quick fix for
                  // internal performance test to be available as soon as
                  // possible.
  
                  this.parsedRequestOriginTimeInMs = System.currentTimeMillis();
                  if(this.parsedRequestOriginTimeInMs < 0) {
                      RestErrorHandler.writeErrorResponse(messageEvent,
                                                          HttpResponseStatus.BAD_REQUEST,
                                                          "Origin time cannot be negative ");
  
                  } else {
                      result = true;
                  }
              } catch(NumberFormatException nfe) {
                  logger.error("Exception when validating request. Incorrect origin time parameter. Cannot parse this to long: "
                                       + originTime,
                               nfe);
                  RestErrorHandler.writeErrorResponse(this.messageEvent,
                                                      HttpResponseStatus.BAD_REQUEST,
                                                      "Incorrect origin time parameter. Cannot parse this to long: "
                                                              + originTime);
              }
          } else {
              logger.error("Error when validating request. Missing origin time parameter.");
              RestErrorHandler.writeErrorResponse(this.messageEvent,
                                                  HttpResponseStatus.BAD_REQUEST,
                                                  "Missing origin time parameter.");
          }
          return result;
      }
docs: Retrieve and validate the timestamp value from the REST request.
  "X_VOLD_REQUEST_ORIGIN_TIME_MS" is timestamp header
  
  TODO REST-Server 1. Change Time stamp header to a better name.
  
  @return true if present, false if missing