cleanCache method

int cleanCache(int maxMemory)

Implementation

int cleanCache(int maxMemory) {
  if (maxMemory <= 0) return -1;

  if (hasTimeout) {
    cleanCacheTimedOut();
  }

  var usedMemory = calculateCacheUsedMemory();
  if (usedMemory <= maxMemory) return 0;

  var entries =
      List<MapEntry<_CacheRequest, HttpResponse>>.from(_cache.entries);

  entries.sort((e1, e2) {
    var m1 = e1.key.memorySize() + e1.value.memorySize();
    var m2 = e2.key.memorySize() + e2.value.memorySize();
    return m1 < m2 ? 1 : (m1 == m2 ? 0 : -1);
  });

  var removeNeeded = usedMemory - maxMemory;

  var removed = 0;
  for (var entry in entries) {
    var memory = entry.key.memorySize() + entry.value.memorySize();
    _cache.remove(entry.key);
    removed += memory;

    _log('Removed cached entry> memory: $memory / $removeNeeded');

    if ((usedMemory - removed) <= maxMemory) break;
  }

  _log('Total removed memory: $removed / $usedMemory / $maxMemory');

  return removed;
}