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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_HOST_H_
- #define COMPONENTS_SYNC_ENGINE_SYNC_ENGINE_HOST_H_
- #include "components/sync/base/model_type.h"
- #include "components/sync/engine/sync_encryption_handler.h"
- #include "components/sync/engine/sync_manager.h"
- #include "components/sync/protocol/sync_protocol_error.h"
- namespace syncer {
- class ProtocolEvent;
- // SyncEngineHost is the interface used by SyncEngine to communicate with the
- // entity that created it. It's essentially an observer interface except the
- // SyncEngine always has exactly one.
- class SyncEngineHost {
- public:
- SyncEngineHost() = default;
- virtual ~SyncEngineHost() = default;
- // The engine has completed initialization and it is now ready to accept and
- // process changes. If success is false, initialization wasn't able to be
- // completed and should be retried.
- //
- // |js_backend| is what chrome://sync-internals interacts with. It is
- // initialized only if |success| is true.
- virtual void OnEngineInitialized(bool success,
- bool is_first_time_sync_configure) = 0;
- // The engine queried the server recently and received some updates.
- virtual void OnSyncCycleCompleted(const SyncCycleSnapshot& snapshot) = 0;
- // Informs the host of some network event. These notifications are disabled by
- // default and must be enabled through an explicit request to the SyncEngine.
- //
- // It's disabled by default to avoid copying data across threads when no one
- // is listening for it.
- virtual void OnProtocolEvent(const ProtocolEvent& event) = 0;
- // The status of the connection to the sync server has changed.
- virtual void OnConnectionStatusChange(ConnectionStatus status) = 0;
- // Called to perform migration of |types|.
- virtual void OnMigrationNeededForTypes(ModelTypeSet types) = 0;
- // Called when the sync cycle returns there is an user actionable error.
- virtual void OnActionableError(const SyncProtocolError& error) = 0;
- // Called when the set of backed off types is changed.
- virtual void OnBackedOffTypesChanged() = 0;
- };
- } // namespace syncer
- #endif // COMPONENTS_SYNC_ENGINE_SYNC_ENGINE_HOST_H_
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