add native vehicle network service with libvehiclenetwork libraries
- This is system api only allowing system processes to use.
- use proto to represent exchanged data. This addresses the overhead
of redefining what is already defined in vehicle HAL.
Still proto definition should be updated, but that is much better
than updating code directly.
- Blob is used to contain data. This prevents passing too big data
over binder call. All proto data are serialzed to a Blob and
sent over binder call.
- Added native and java version of libraries: Only native side tested.
- added VehicleNetwork wrapper for clients.
- TODO: migrate car service to VNS,
add Java side teat
start VNS during bootup (currently needs manual start)
implement caching
bug: 24095928
Change-Id: I391d3661de556d313319ba879b03685890cf2108
(cherry picked from commit 19559efcb153c16a77d753d535757c5d10e49708)
diff --git a/libvehiclenetwork/java/src/com/android/car/vehiclenetwork/VehicleNetwork.java b/libvehiclenetwork/java/src/com/android/car/vehiclenetwork/VehicleNetwork.java
new file mode 100644
index 0000000..8ed4433
--- /dev/null
+++ b/libvehiclenetwork/java/src/com/android/car/vehiclenetwork/VehicleNetwork.java
@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+package com.android.car.vehiclenetwork;
+
+import android.annotation.Nullable;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.Message;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.util.Log;
+
+import com.android.car.vehiclenetwork.VehicleNetworkProto.VehiclePropConfigs;
+import com.android.car.vehiclenetwork.VehicleNetworkProto.VehiclePropValue;
+import com.android.car.vehiclenetwork.VehicleNetworkProto.VehiclePropValues;
+
+import java.lang.ref.WeakReference;
+
+/**
+ * System API to access Vehicle network. This is only for system services and applications should
+ * not use this.
+ */
+public class VehicleNetwork {
+ public interface VehicleNetworkListener {
+ void onVehicleNetworkEvents(VehiclePropValues values);
+ }
+
+ public static final int NO_ERROR = 0;
+ public static final int ERROR_UNKNOWN = -1;
+
+ private static final String TAG = VehicleNetwork.class.getSimpleName();
+
+ private final IVehicleNetwork mService;
+ private final VehicleNetworkListener mListener;
+ private final IVehicleNetworkListenerImpl mVehicleNetworkListener;
+ private final EventHandler mEventHandler;
+
+ public VehicleNetwork createVehicleNetwork(VehicleNetworkListener listener, Looper looper) {
+ IVehicleNetwork service = IVehicleNetwork.Stub.asInterface(ServiceManager.getService(
+ IVehicleNetwork.class.getCanonicalName()));
+ if (service == null) {
+ throw new RuntimeException("Vehicle network service not available");
+ }
+ return new VehicleNetwork(service, listener, looper);
+ }
+
+ private VehicleNetwork(IVehicleNetwork service, VehicleNetworkListener listener,
+ Looper looper) {
+ mService = service;
+ mListener = listener;
+ mEventHandler = new EventHandler(looper);
+ mVehicleNetworkListener = new IVehicleNetworkListenerImpl(this);
+ }
+
+ public VehiclePropConfigs listProperties(int property) {
+ try {
+ VehiclePropConfigsParcelable parcelable = mService.listProperties(property);
+ if (parcelable != null) {
+ return parcelable.configs;
+ }
+ } catch (RemoteException e) {
+ handleRemoteException(e);
+ }
+ return null;
+ }
+
+ public int setProperty(VehiclePropValue value) {
+ VehiclePropValueParcelable parcelable = new VehiclePropValueParcelable(value);
+ try {
+ int r = mService.setProperty(parcelable);
+ return r;
+ } catch (RemoteException e) {
+ handleRemoteException(e);
+ }
+ return ERROR_UNKNOWN;
+ }
+
+ public VehiclePropValue getProperty(int property) {
+ try {
+ VehiclePropValueParcelable parcelable = mService.getProperty(property);
+ if (parcelable != null) {
+ return parcelable.value;
+ }
+ } catch (RemoteException e) {
+ handleRemoteException(e);
+ }
+ return null;
+ }
+
+ public int subscribe(int property, float sampleRate) {
+ try {
+ int r = mService.subscribe(mVehicleNetworkListener, property, sampleRate);
+ return r;
+ } catch (RemoteException e) {
+ handleRemoteException(e);
+ }
+ return ERROR_UNKNOWN;
+ }
+
+ public void unsubscribe(int property) {
+ try {
+ mService.unsubscribe(mVehicleNetworkListener, property);
+ } catch (RemoteException e) {
+ handleRemoteException(e);
+ }
+ }
+
+ private void handleRemoteException(RemoteException e) {
+ throw new RuntimeException("Vehicle network service not working ", e);
+ }
+
+ private void handleVehicleNetworkEvents(VehiclePropValues values) {
+ mEventHandler.notifyEvents(values);
+ }
+
+ private void doHandleVehicleNetworkEvents(VehiclePropValues values) {
+ mListener.onVehicleNetworkEvents(values);
+ }
+
+ private class EventHandler extends Handler {
+ private static final int MSG_EVENTS = 0;
+
+ private EventHandler(Looper looper) {
+ super(looper);
+ }
+
+ private void notifyEvents(VehiclePropValues values) {
+ Message msg = obtainMessage(MSG_EVENTS, values);
+ sendMessage(msg);
+ }
+
+ @Override
+ public void handleMessage(Message msg) {
+ switch (msg.what) {
+ case MSG_EVENTS:
+ doHandleVehicleNetworkEvents((VehiclePropValues)msg.obj);
+ break;
+ default:
+ Log.w(TAG, "unown message:" + msg.what, new RuntimeException());
+ break;
+ }
+ }
+ }
+
+ private static class IVehicleNetworkListenerImpl extends IVehicleNetworkListener.Stub {
+ private final WeakReference<VehicleNetwork> mVehicleNetwork;
+
+ private IVehicleNetworkListenerImpl(VehicleNetwork vehicleNewotk) {
+ mVehicleNetwork = new WeakReference<VehicleNetwork>(vehicleNewotk);
+ }
+
+ @Override
+ public void onVehicleNetworkEvents(VehiclePropValuesParcelable values) {
+ VehicleNetwork vehicleNetwork = mVehicleNetwork.get();
+ if (vehicleNetwork != null) {
+ vehicleNetwork.handleVehicleNetworkEvents(values.values);
+ }
+ }
+ }
+}