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//
// Copyright (C) 2016 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#ifndef UPDATE_ENGINE_COMMON_DAEMON_STATE_INTERFACE_H_
#define UPDATE_ENGINE_COMMON_DAEMON_STATE_INTERFACE_H_
#include "update_engine/common/service_observer_interface.h"
#include <set>
namespace chromeos_update_engine {
class DaemonStateInterface {
public:
virtual ~DaemonStateInterface() = default;
// Start the daemon loop. Should be called only once to start the daemon's
// main functionality.
virtual bool StartUpdater() = 0;
// Add and remove an observer. All the registered observers will be called
// whenever there's a new status to update.
virtual void AddObserver(ServiceObserverInterface* observer) = 0;
virtual void RemoveObserver(ServiceObserverInterface* observer) = 0;
// Return the set of current observers.
virtual const std::set<ServiceObserverInterface*>& service_observers() = 0;
protected:
DaemonStateInterface() = default;
DISALLOW_COPY_AND_ASSIGN(DaemonStateInterface);
};
} // namespace chromeos_update_engine
#endif // UPDATE_ENGINE_COMMON_DAEMON_STATE_INTERFACE_H_
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