chromium/components/feature_engagement/internal/persistent_event_store.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_FEATURE_ENGAGEMENT_INTERNAL_PERSISTENT_EVENT_STORE_H_
#define COMPONENTS_FEATURE_ENGAGEMENT_INTERNAL_PERSISTENT_EVENT_STORE_H_

#include <memory>
#include <vector>

#include "base/files/file_path.h"
#include "base/memory/weak_ptr.h"
#include "components/feature_engagement/internal/event_store.h"
#include "components/feature_engagement/internal/proto/feature_event.pb.h"
#include "components/leveldb_proto/public/proto_database.h"

namespace feature_engagement {

// A PersistentEventStore provides a DB layer that persists the data to disk.
// The data is retrieved once during the load process and after that this store
// is write only.  Data will be persisted asynchronously so it is not guaranteed
// to always save every write during shutdown.
class PersistentEventStore : public EventStore { … };

}  // namespace feature_engagement

#endif  // COMPONENTS_FEATURE_ENGAGEMENT_INTERNAL_PERSISTENT_EVENT_STORE_H_