private def update()

in algebird-core/src/main/scala/com/twitter/algebird/AdaptiveCache.scala [70:95]

• 21 lines of code
• 7 McCabe index (conditional complexity)

  private def update(evicted: Option[Map[K, V]]) = {
    evicted.foreach(e => sentinelCache.put(e))

    var ret = evicted

    if (
      currentCapacity < maxCapacity &&
      sentinelCache.size > (currentCapacity * growthMargin)
    ) {
      currentCapacity = (currentCapacity * 2).min(maxCapacity)

      ret = (ret, summingCache.flush) match {
        case (Some(l), Some(r)) => Some(semigroup.plus(l, r))
        case (l, None)          => l
        case (None, r)          => r
      }

      summingCache = new SummingWithHitsCache(currentCapacity)

      if (currentCapacity == maxCapacity)
        sentinelCache.stopGrowing()
      else
        sentinelCache.clear()
    }
    ret
  }