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// Copyright (c) 2011 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.
//
// Interface to the sync notifier, which is an object that receives
// notifications when updates are available for a set of sync types.
// All the observers are notified when such an event happens.
//
// A SyncNotifier must be destroyed on the same thread it was created on,
// and all its methods must be called on the same thread (not necessarily
// the one it was created on). If the methods thread is different from the
// creation thread, then the methods thread must not exist when the SyncNotifier
// is created and destroyed.
//
// In particular, the SyncNotifier will be created on the UI thread, the syncer
// core thread will be created, the SyncNotifier will be used on that core
// thread, the syncer core thread will be destroyed, and then the SyncNotifier
// will be destroyed.
//
// TODO(akalin): Remove the code to deal with this situation once the syncer
// core thread goes away.
#ifndef CHROME_BROWSER_SYNC_NOTIFIER_SYNC_NOTIFIER_H_
#define CHROME_BROWSER_SYNC_NOTIFIER_SYNC_NOTIFIER_H_
#include <string>
#include "chrome/browser/sync/syncable/model_type.h"
namespace sync_notifier {
class SyncNotifierObserver;
class SyncNotifier {
public:
SyncNotifier() {}
virtual ~SyncNotifier() {}
virtual void AddObserver(SyncNotifierObserver* observer) = 0;
virtual void RemoveObserver(SyncNotifierObserver* observer) = 0;
// SetState must be called once, before any call to UpdateCredentials.
virtual void SetState(const std::string& state) = 0;
// The observers won't be notified of any notifications until
// UpdateCredentials is called at least once. It can be called more than
// once.
virtual void UpdateCredentials(
const std::string& email, const std::string& token) = 0;
virtual void UpdateEnabledTypes(const syncable::ModelTypeSet& types) = 0;
// This is here only to support the old p2p notification implementation,
// which is still used by sync integration tests.
// TODO(akalin): Remove this once we move the integration tests off p2p
// notifications.
virtual void SendNotification() = 0;
};
} // namespace sync_notifier
#endif // CHROME_BROWSER_SYNC_NOTIFIER_SYNC_NOTIFIER_H_
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