Method getTSUIDFromKey

src/uid/UniqueId.java:1575–1596

Extracts the TSUID from a storage row key that includes the timestamp. @param row_key The row key to process @param metric_width The width of the metric @param timestamp_width The width of the timestamp @return The TSUID as a byte array @throws IllegalArgumentException if the row key is missing tags

(final byte[] row_key, 
      final short metric_width, final short timestamp_width)

   * corrupt such as a salted key when salting is disabled or vice versa.
   */
  public static byte[] getTSUIDFromKey(final byte[] row_key, 
      final short metric_width, final short timestamp_width) {
    int idx = 0;
    // validation
    final int tag_pair_width = TSDB.tagk_width() + TSDB.tagv_width();
    final int tags_length = row_key.length - 
        (Const.SALT_WIDTH() + metric_width + timestamp_width);
    if (tags_length < tag_pair_width || (tags_length % tag_pair_width) != 0) {
      throw new IllegalArgumentException(
          "Row key is missing tags or it is corrupted " + Arrays.toString(row_key));
    }
    final byte[] tsuid = new byte[
                 row_key.length - timestamp_width - Const.SALT_WIDTH()];
    for (int i = Const.SALT_WIDTH(); i < row_key.length; i++) {
      if (i < Const.SALT_WIDTH() + metric_width || 
          i >= (Const.SALT_WIDTH() + metric_width + timestamp_width)) {
        tsuid[idx] = row_key[i];
        idx++;
      }
    }
    return tsuid;
  }
  
  /**
   * Extracts a list of tagks and tagvs as individual values in a list