1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.car; 18 19 import android.annotation.Nullable; 20 import android.car.Car; 21 import android.car.builtin.util.Slogf; 22 import android.car.hardware.power.CarPowerManager; 23 import android.content.Context; 24 import android.util.ArrayMap; 25 26 import com.android.car.power.CarPowerManagementService; 27 import com.android.internal.annotations.VisibleForTesting; 28 29 /** 30 * Copy of frameworks/base/core/java/com/android/server/LocalServices.java 31 * This is for accessing other car service components. 32 */ 33 public class CarLocalServices { 34 private static final boolean DBG = false; 35 36 private static final String TAG = CarLog.tagFor(CarLocalServices.class); 37 CarLocalServices()38 private CarLocalServices() {} 39 40 private static final ArrayMap<Class<?>, Object> sLocalServiceObjects = 41 new ArrayMap<Class<?>, Object>(); 42 43 /** 44 * Returns a local service instance that implements the specified interface. 45 * 46 * @param type The type of service. 47 * @return The service object. 48 */ 49 @SuppressWarnings("unchecked") 50 @Nullable getService(Class<T> type)51 public static <T> T getService(Class<T> type) { 52 if (DBG) { 53 Slogf.d(TAG, " getService " + type.getSimpleName()); 54 } 55 synchronized (sLocalServiceObjects) { 56 return (T) sLocalServiceObjects.get(type); 57 } 58 } 59 60 /** 61 * Adds a service instance of the specified interface to the global registry of local services. 62 */ addService(Class<T> type, T service)63 public static <T> void addService(Class<T> type, T service) { 64 synchronized (sLocalServiceObjects) { 65 if (sLocalServiceObjects.containsKey(type)) { 66 throw new IllegalStateException("Overriding service registration"); 67 } 68 if (DBG) { 69 Slogf.d(TAG, " Adding " + type.getSimpleName()); 70 } 71 sLocalServiceObjects.put(type, service); 72 } 73 } 74 75 /** 76 * Remove a service instance, must be only used in tests. 77 */ 78 @VisibleForTesting removeServiceForTest(Class<T> type)79 public static <T> void removeServiceForTest(Class<T> type) { 80 if (DBG) { 81 Slogf.d(TAG, " Removing " + type.getSimpleName()); 82 } 83 synchronized (sLocalServiceObjects) { 84 sLocalServiceObjects.remove(type); 85 } 86 } 87 88 /** 89 * Remove all registered services. Should be called when car service restarts. 90 */ removeAllServices()91 public static void removeAllServices() { 92 if (DBG) { 93 Slogf.d(TAG, " removeAllServices"); 94 } 95 synchronized (sLocalServiceObjects) { 96 sLocalServiceObjects.clear(); 97 } 98 } 99 100 /** 101 * Create CarPowerManager from registered CarPowerManagementService. 102 * @param context 103 * @return Newly created CarPowerManager. It will return null if CarPowerManagementService is 104 * not registered, which can only happen in test setup. 105 */ 106 @Nullable createCarPowerManager(Context context)107 public static CarPowerManager createCarPowerManager(Context context) { 108 // This does not require connection as binder will be passed to CarPowerManager directly. 109 Car car = new Car(context, /* service= */null, /* handler= */ null); 110 CarPowerManagementService service = getService(CarPowerManagementService.class); 111 if (service == null) { 112 return null; 113 } 114 return new CarPowerManager(car, service); 115 } 116 } 117