Status BlockCache::remove()

in cachelib/navy/block_cache/BlockCache.cpp [255:292]

32 lines of code
10 McCabe index (conditional complexity)


Status BlockCache::remove(HashedKey hk) {
  removeCount_.inc();

  Buffer value;
  if ((itemDestructorEnabled_ && destructorCb_) || preciseRemove_) {
    Status status = lookup(hk, value);

    if (status != Status::Ok) {
      // device error, or region reclaimed, or item not found
      value.reset();
      if (status == Status::Retry) {
        return status;
      } else if (status != Status::NotFound) {
        lookupForItemDestructorErrorCount_.inc();
        // still fail after retry, return a BadState to disable navy
        return Status::BadState;
      } else {
        // NotFound
        removeAttemptCollisions_.inc();
        if (preciseRemove_) {
          return status;
        }
      }
    }
  }

  auto lr = index_.remove(hk.keyHash());
  if (lr.found()) {
    holeSizeTotal_.add(decodeSizeHint(lr.sizeHint()));
    holeCount_.inc();
    succRemoveCount_.inc();
    if (!value.isNull()) {
      destructorCb_(hk.key(), value.view(), DestructorEvent::Removed);
    }
    return Status::Ok;
  }
  return Status::NotFound;
}