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- // Copyright 2014 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_SYNC_ENGINE_SYNC_ENGINE_EVENT_LISTENER_H_
- #define COMPONENTS_SYNC_ENGINE_SYNC_ENGINE_EVENT_LISTENER_H_
- #include "base/time/time.h"
- #include "components/sync/base/model_type.h"
- namespace syncer {
- struct SyncProtocolError;
- struct SyncCycleEvent;
- class ProtocolEvent;
- class SyncEngineEventListener {
- public:
- SyncEngineEventListener() = default;
- // Generated at various points during the sync cycle.
- virtual void OnSyncCycleEvent(const SyncCycleEvent& event) = 0;
- // This event is sent when we receive an actionable error. It is up to
- // the listeners to figure out the action to take using the error sent.
- virtual void OnActionableError(const SyncProtocolError& error) = 0;
- // This event is sent when scheduler decides to wait before next request
- // either because it gets throttled by server or because it backs off after
- // request failure. Retry time is passed in retry_time field of event.
- virtual void OnRetryTimeChanged(base::Time retry_time) = 0;
- // This event is sent when types are throttled or unthrottled.
- virtual void OnThrottledTypesChanged(ModelTypeSet throttled_types) = 0;
- // This event is sent when types are backed off or unbacked off.
- virtual void OnBackedOffTypesChanged(ModelTypeSet backed_off_types) = 0;
- // This event is sent when the server requests a migration.
- virtual void OnMigrationRequested(ModelTypeSet migration_types) = 0;
- // Emits events when sync communicates with the server.
- virtual void OnProtocolEvent(const ProtocolEvent& event) = 0;
- protected:
- virtual ~SyncEngineEventListener() = default;
- };
- } // namespace syncer
- #endif // COMPONENTS_SYNC_ENGINE_SYNC_ENGINE_EVENT_LISTENER_H_
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