| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // 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_STORE_H_ |
| #define COMPONENTS_FEATURE_ENGAGEMENT_INTERNAL_STORE_H_ |
| |
| #include <string> |
| |
| #include "base/callback.h" |
| #include "base/macros.h" |
| #include "components/feature_engagement/internal/proto/feature_event.pb.h" |
| |
| namespace feature_engagement { |
| |
| // EventStore represents the storage engine behind the EventModel. |
| class EventStore { |
| public: |
| using OnLoadedCallback = |
| base::Callback<void(bool success, std::unique_ptr<std::vector<Event>>)>; |
| |
| virtual ~EventStore() = default; |
| |
| // Loads the database from storage and asynchronously posts the result back |
| // on the caller's thread. |
| // Ownership of the loaded data is given to the caller. |
| virtual void Load(const OnLoadedCallback& callback) = 0; |
| |
| // Returns whether the database is ready, i.e. whether it has been fully |
| // loaded. |
| virtual bool IsReady() const = 0; |
| |
| // Stores the given event to persistent storage. |
| virtual void WriteEvent(const Event& event) = 0; |
| |
| // Deletes the event with the given name. |
| virtual void DeleteEvent(const std::string& event_name) = 0; |
| |
| protected: |
| EventStore() = default; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(EventStore); |
| }; |
| |
| } // namespace feature_engagement |
| |
| #endif // COMPONENTS_FEATURE_ENGAGEMENT_INTERNAL_STORE_H_ |