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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 SYNC_ENGINE_SYNC_ENGINE_EVENT_LISTENER_H_
#define SYNC_ENGINE_SYNC_ENGINE_EVENT_LISTENER_H_
#include "base/time/time.h"
#include "sync/base/sync_export.h"
#include "sync/internal_api/public/base/model_type.h"
namespace syncer {
struct SyncProtocolError;
struct SyncCycleEvent;
class ProtocolEvent;
class SYNC_EXPORT SyncEngineEventListener {
public:
SyncEngineEventListener();
// 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 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();
};
} // namespace syncer
#endif // SYNC_ENGINE_SYNC_ENGINE_EVENT_LISTENER_H_
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