docs: protected void append(AppendRecord record, InputStream in, int length)
              throws JournalException {
  
          try {
              conHelper.exec(insertRevisionStmtSQL, record.getRevision(), getId(), record.getProducerId(),
                  new StreamWrapper(in, length));
  
          } catch (SQLException e) {
              String msg = "Unable to append revision " + lockedRevision + ".";
              throw new JournalException(msg, e);
          }
      }