def offsetUuid()

in core/src/main/scala/org/apache/pekko/persistence/cassandra/query/scaladsl/CassandraReadJournal.scala [231:259]

• 12 lines of code
• 5 McCabe index (conditional complexity)

  def offsetUuid(timestamp: Long): UUID =
    if (timestamp == 0L) firstOffset else Uuids.startOf(timestamp)

  /**
   * Create a time based UUID that can be used as offset in `eventsByTag`
   * queries. The `timestamp` is a unix timestamp (as returned by
   * `System#currentTimeMillis`).
   */
  def timeBasedUUIDFrom(timestamp: Long): Offset =
    if (timestamp == 0L) NoOffset
    else TimeBasedUUID(offsetUuid(timestamp))

  /**
   * Convert a `TimeBasedUUID` to a unix timestamp (as returned by
   * `System#currentTimeMillis`).
   */
  def timestampFrom(offset: TimeBasedUUID): Long =
    Uuids.unixTimestamp(offset.value)

  /**
   * Convert a `TimeBasedUUID` to a unix timestamp (as returned by
   * `System#currentTimeMillis`. If it's not a `TimeBasedUUID` it
   * will return 0.
   */
  private def timestampFrom(offset: Offset): Long =
    offset match {
      case t: TimeBasedUUID => timestampFrom(t)
      case _                => 0
    }