chromium/components/sync/engine/get_updates_delegate.h

// Copyright 2014 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_SYNC_ENGINE_GET_UPDATES_DELEGATE_H_
#define COMPONENTS_SYNC_ENGINE_GET_UPDATES_DELEGATE_H_

#include <memory>

#include "base/memory/raw_ref.h"
#include "components/sync/engine/cycle/nudge_tracker.h"
#include "components/sync/engine/cycle/status_controller.h"
#include "components/sync/engine/data_type_registry.h"
#include "components/sync/engine/events/protocol_event.h"

namespace sync_pb {
class GetUpdatesMessage;
class ClientToServerMessage;
enum SyncEnums_GetUpdatesOrigin : int;
}  // namespace sync_pb

namespace syncer {

// Interface for GetUpdates functionality that depends on the requested
// GetUpdate type (normal, configuration, poll).  The GetUpdatesProcessor is
// given an appropriate GetUpdatesDelegate to handle type specific functionality
// on construction.
class GetUpdatesDelegate { … };

// Functionality specific to the normal GetUpdate request.
class NormalGetUpdatesDelegate : public GetUpdatesDelegate { … };

// Functionality specific to the configure GetUpdate request.
class ConfigureGetUpdatesDelegate : public GetUpdatesDelegate { … };

// Functionality specific to the poll GetUpdate request.
class PollGetUpdatesDelegate : public GetUpdatesDelegate { … };

}  // namespace syncer

#endif  // COMPONENTS_SYNC_ENGINE_GET_UPDATES_DELEGATE_H_