Refactor daemon state and service async notification.
There are three supported IPC mechanism in this code: DBus, binder and
weave (over binder); which are mostly supported by all three platforms
Chrome OS, Brillo and Android. The exceptions are that Brillo and
Chrome OS still *require* DBus and support the others, while the new
Android daemon requires and supports only Binder.
This CL introduces two new interfaces: the ServiceObserverInterface and
the DaemonStateInterface.
The first one abstracts a service (or IPC service) into an interfcae
from the point of view of the daemon initialization and async
notifications of status changes. The second interface encapsulates the
state and main functionality of the update_engine daemon while leaving
the shared initialization in the main.cc and daemon.cc classes.
Bug: 25631949
TEST=`mmma system/update_engine` on edison-eng and aosp_arm-eng
TEST=FEATURES=test emerge-link update_engine
Change-Id: Ic15621031a153e14bdc4df8fcedbca1032e82c21
diff --git a/daemon_state_android.h b/daemon_state_android.h
new file mode 100644
index 0000000..2b8926c
--- /dev/null
+++ b/daemon_state_android.h
@@ -0,0 +1,44 @@
+//
+// 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_DAEMON_STATE_ANDROID_H_
+#define UPDATE_ENGINE_DAEMON_STATE_ANDROID_H_
+
+#include <set>
+
+#include "update_engine/daemon_state_interface.h"
+#include "update_engine/service_observer_interface.h"
+
+namespace chromeos_update_engine {
+
+class DaemonStateAndroid : public DaemonStateInterface {
+ public:
+ DaemonStateAndroid() = default;
+
+ bool Initialize();
+
+ // DaemonStateInterface overrides.
+ bool StartUpdater() override;
+ void AddObserver(ServiceObserverInterface* observer) override;
+ void RemoveObserver(ServiceObserverInterface* observer) override;
+
+ protected:
+ std::set<ServiceObserverInterface*> service_observers_;
+};
+
+} // namespace chromeos_update_engine
+
+#endif // UPDATE_ENGINE_DAEMON_STATE_ANDROID_H_