public static Long writeOpCRC32(String stream,byte[] payload){
  CRC32 crc=requestCRC.get();
  try {
    crc.update(stream.getBytes(UTF_8));
    crc.update(payload);
    return crc.getValue();
  }
  finally {
    crc.reset();
  }
}

public static Long writeOpCRC32 ( String stream , byte [ ] payload ) { CRC32 crc = requestCRC . get ( ) ; try { crc . update ( stream . getBytes ( UTF_8 ) ) ; crc . update ( payload ) ; return crc . getValue ( ) ; } finally { crc . reset ( ) ; } }
generate crc32 for writeop .
