Method DeleteFileAndReleaseCache

src/leveldb/persistent_cache/persistent_cache_impl.cc:334–348

std::vector<std::string> PersistentCacheImpl::GetAllKeys() { return metadata_.GetAllKeys(); }

Status PersistentCacheImpl::DeleteFileAndReleaseCache(CacheFile* file) {
  uint64_t file_size;
  auto status = file->Delete(&file_size);
  if (!status.ok()) {
    // unable to delete file
    LEVELDB_LOG("Remove evicted cache file %lu.rc failed, reason: %s.", file->cacheid(),
                status.ToString().c_str());
    return status;
  }

  assert(file_size <= (uint64_t)size_.Get());
  size_.Sub(file_size);
  assert(size_.Get() >= 0);
  return status;
}

void PersistentCacheImpl::GarbageCollect() {
  std::vector<std::unique_ptr<CacheFile>> evictable_files = metadata_.CollectEvictableFiles();