| /* |
| * Copyright (C) 2019 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; |
| |
| import android.car.IExperimentalCar; |
| import android.car.IExperimentalCarHelper; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.ServiceConnection; |
| import android.os.IBinder; |
| import android.os.Process; |
| import android.os.RemoteException; |
| import android.os.UserHandle; |
| import android.util.ArrayMap; |
| import android.util.IndentingPrintWriter; |
| import android.util.Slog; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.annotations.VisibleForTesting; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Controls binding to ExperimentalCarService and interfaces for experimental features. |
| */ |
| public final class CarExperimentalFeatureServiceController implements CarServiceBase { |
| |
| private static final String TAG = CarLog.tagFor(CarExperimentalFeatureServiceController.class); |
| |
| private final Context mContext; |
| |
| private final ServiceConnection mServiceConnection = new ServiceConnection() { |
| @Override |
| public void onServiceConnected(ComponentName name, IBinder service) { |
| IExperimentalCar experimentalCar; |
| synchronized (mLock) { |
| experimentalCar = IExperimentalCar.Stub.asInterface(service); |
| mExperimentalCar = experimentalCar; |
| } |
| if (experimentalCar == null) { |
| Slog.e(TAG, "Experimental car returned null binder"); |
| return; |
| } |
| CarFeatureController featureController = CarLocalServices.getService( |
| CarFeatureController.class); |
| List<String> enabledExperimentalFeatures = |
| featureController.getEnabledExperimentalFeatures(); |
| try { |
| experimentalCar.init(mHelper, enabledExperimentalFeatures); |
| } catch (RemoteException e) { |
| Slog.e(TAG, "Experimental car service crashed", e); |
| } |
| } |
| |
| @Override |
| public void onServiceDisconnected(ComponentName name) { |
| resetFeatures(); |
| } |
| }; |
| |
| private final IExperimentalCarHelper mHelper = new IExperimentalCarHelper.Stub() { |
| @Override |
| public void onInitComplete(List<String> allAvailableFeatures, List<String> startedFeatures, |
| List<String> classNames, List<IBinder> binders) { |
| if (allAvailableFeatures == null) { |
| Slog.e(TAG, "Experimental car passed null allAvailableFeatures"); |
| return; |
| } |
| if (startedFeatures == null || classNames == null || binders == null) { |
| Slog.i(TAG, "Nothing enabled in Experimental car"); |
| return; |
| } |
| int sizeOfStartedFeatures = startedFeatures.size(); |
| if (sizeOfStartedFeatures != classNames.size() |
| || sizeOfStartedFeatures != binders.size()) { |
| Slog.e(TAG, |
| "Experimental car passed wrong lists of enabled features, startedFeatures:" |
| + startedFeatures + " classNames:" + classNames + " binders:" + binders); |
| } |
| // Do conversion to make indexed accesses |
| ArrayList<String> classNamesInArray = new ArrayList<>(classNames); |
| ArrayList<IBinder> bindersInArray = new ArrayList<>(binders); |
| synchronized (mLock) { |
| for (int i = 0; i < startedFeatures.size(); i++) { |
| mEnabledFeatures.put(startedFeatures.get(i), |
| new FeatureInfo(classNamesInArray.get(i), |
| bindersInArray.get(i))); |
| } |
| } |
| CarFeatureController featureController = CarLocalServices.getService( |
| CarFeatureController.class); |
| featureController.setAvailableExperimentalFeatureList(allAvailableFeatures); |
| Slog.i(TAG, "Available experimental features:" + allAvailableFeatures); |
| Slog.i(TAG, "Started experimental features:" + startedFeatures); |
| } |
| }; |
| |
| private final Object mLock = new Object(); |
| |
| @GuardedBy("mLock") |
| private IExperimentalCar mExperimentalCar; |
| |
| @GuardedBy("mLock") |
| private final ArrayMap<String, FeatureInfo> mEnabledFeatures = new ArrayMap<>(); |
| |
| @GuardedBy("mLock") |
| private boolean mBound; |
| |
| private static class FeatureInfo { |
| public final String className; |
| public final IBinder binder; |
| |
| FeatureInfo(String className, IBinder binder) { |
| this.className = className; |
| this.binder = binder; |
| } |
| } |
| |
| public CarExperimentalFeatureServiceController(Context context) { |
| mContext = context; |
| } |
| |
| @Override |
| public void init() { |
| // Do binding only for real car servie |
| Intent intent = new Intent(); |
| intent.setComponent(new ComponentName("com.android.experimentalcar", |
| "com.android.experimentalcar.ExperimentalCarService")); |
| boolean bound = bindService(intent); |
| if (!bound) { |
| Slog.e(TAG, "Cannot bind to experimental car service, intent:" + intent); |
| } |
| synchronized (mLock) { |
| mBound = bound; |
| } |
| } |
| |
| /** |
| * Bind service. Separated for testing. |
| * Test will override this. Default behavior will not bind if it is not real run (=system uid). |
| */ |
| @VisibleForTesting |
| public boolean bindService(Intent intent) { |
| int myUid = Process.myUid(); |
| if (myUid != Process.SYSTEM_UID) { |
| Slog.w(TAG, "Binding experimental service skipped as this may be test env, uid:" |
| + myUid); |
| return false; |
| } |
| try { |
| return mContext.bindServiceAsUser(intent, mServiceConnection, |
| Context.BIND_AUTO_CREATE, UserHandle.SYSTEM); |
| } catch (Exception e) { |
| // Do not crash car service for case like package not found and etc. |
| Slog.e(TAG, "Cannot bind to experimental car service", e); |
| return false; |
| } |
| } |
| |
| @Override |
| public void release() { |
| synchronized (mLock) { |
| if (mBound) { |
| mContext.unbindService(mServiceConnection); |
| } |
| mBound = false; |
| resetFeatures(); |
| } |
| } |
| |
| @Override |
| public void dump(IndentingPrintWriter writer) { |
| writer.println("*CarExperimentalFeatureServiceController*"); |
| |
| synchronized (mLock) { |
| writer.println(" mEnabledFeatures, number of features:" + mEnabledFeatures.size() |
| + ", format: (feature, class)"); |
| for (int i = 0; i < mEnabledFeatures.size(); i++) { |
| String feature = mEnabledFeatures.keyAt(i); |
| FeatureInfo info = mEnabledFeatures.valueAt(i); |
| writer.println(feature + "," + info.className); |
| } |
| writer.println("mBound:" + mBound); |
| } |
| } |
| |
| /** |
| * Returns class name for experimental feature. |
| */ |
| public String getCarManagerClassForFeature(String featureName) { |
| FeatureInfo info; |
| synchronized (mLock) { |
| info = mEnabledFeatures.get(featureName); |
| } |
| if (info == null) { |
| return null; |
| } |
| return info.className; |
| } |
| |
| /** |
| * Returns service binder for experimental feature. |
| */ |
| public IBinder getCarService(String serviceName) { |
| FeatureInfo info; |
| synchronized (mLock) { |
| info = mEnabledFeatures.get(serviceName); |
| } |
| if (info == null) { |
| return null; |
| } |
| return info.binder; |
| } |
| |
| private void resetFeatures() { |
| synchronized (mLock) { |
| mExperimentalCar = null; |
| mEnabledFeatures.clear(); |
| } |
| } |
| } |