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