예제 #1
0
			Status Delete(const std::string& key)
			{
				leveldb::Status s = db->Delete(leveldb::WriteOptions(), key);

				if (s.ok())
				{
					return Status::OK();
				}

				return Status::NotFound();
			}
예제 #2
0
파일: leveldb.cpp 프로젝트: ankurcha/mesos
Future<bool> LevelDBStorageProcess::expunge(const Entry& entry)
{
  if (error.isSome()) {
    return Failure(error.get());
  }

  // We do a read first to make sure the version has not changed. This
  // could be optimized in the future, for now it will probably hit
  // the cache anyway.
  Try<Option<Entry> > option = read(entry.name());

  if (option.isError()) {
    return Failure(option.error());
  }

  if (option.get().isNone()) {
    return false;
  }

  if (UUID::fromBytes(option.get().get().uuid()) !=
      UUID::fromBytes(entry.uuid())) {
    return false;
  }

  // Note that the read (i.e., DB::Get) and DB::Delete are inherently
  // "atomic" because only one db can be opened at a time, so there
  // can not be any writes that occur concurrently.

  leveldb::WriteOptions options;
  options.sync = true;

  leveldb::Status status = db->Delete(options, entry.name());

  if (!status.ok()) {
    return Failure(status.ToString());
  }

  return true;
}