private String newRequestID(){
  String requestIDString=null;
synchronized (REQUEST_ID_LOCK) {
    requestIDString=String.valueOf(requestID++);
  }
  return requestIDString;
}

private String newRequestID ( ) { String requestIDString = null ; synchronized ( REQUEST_ID_LOCK ) { requestIDString = String . valueOf ( requestID ++ ) ; } return requestIDString ; }
returns a new request id . used in identifying request messages sent to policy service
