1 /* 2 * Copyright (C) 2021 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 package android.bluetooth; 17 18 import android.annotation.NonNull; 19 import android.annotation.SystemApi; 20 import android.annotation.SystemApi.Client; 21 import android.app.SystemServiceRegistry; 22 import android.content.Context; 23 import android.os.BluetoothServiceManager; 24 25 import java.util.function.Consumer; 26 27 /** 28 * Class for performing registration for Bluetooth service. 29 * 30 * @hide 31 */ 32 @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES) 33 public class BluetoothFrameworkInitializer { BluetoothFrameworkInitializer()34 private BluetoothFrameworkInitializer() {} 35 36 private static volatile BluetoothServiceManager sBluetoothServiceManager; 37 private static volatile Consumer<Context> sBinderCallsStatsInitializer; 38 39 /** 40 * Sets an instance of {@link BluetoothServiceManager} that allows 41 * the bluetooth mainline module to register/obtain bluetooth binder services. This is called 42 * by the platform during the system initialization. 43 * 44 * @param bluetoothServiceManager instance of {@link BluetoothServiceManager} that allows 45 * the bluetooth mainline module to register/obtain bluetoothd binder services. 46 */ setBluetoothServiceManager( @onNull BluetoothServiceManager bluetoothServiceManager)47 public static void setBluetoothServiceManager( 48 @NonNull BluetoothServiceManager bluetoothServiceManager) { 49 if (sBluetoothServiceManager != null) { 50 throw new IllegalStateException("setBluetoothServiceManager called twice!"); 51 } 52 53 if (bluetoothServiceManager == null) { 54 throw new IllegalArgumentException("bluetoothServiceManager must not be null"); 55 } 56 57 sBluetoothServiceManager = bluetoothServiceManager; 58 } 59 60 /** @hide */ getBluetoothServiceManager()61 public static BluetoothServiceManager getBluetoothServiceManager() { 62 return sBluetoothServiceManager; 63 } 64 65 /** 66 * Called by {@link ActivityThread}'s static initializer to set the callback enabling Bluetooth 67 * {@link BinderCallsStats} registeration. 68 * 69 * @param binderCallsStatsConsumer called by bluetooth service to create a new binder calls 70 * stats observer 71 */ setBinderCallsStatsInitializer( @onNull Consumer<Context> binderCallsStatsConsumer)72 public static void setBinderCallsStatsInitializer( 73 @NonNull Consumer<Context> binderCallsStatsConsumer) { 74 if (sBinderCallsStatsInitializer != null) { 75 throw new IllegalStateException("setBinderCallsStatsInitializer called twice!"); 76 } 77 78 if (binderCallsStatsConsumer == null) { 79 throw new IllegalArgumentException("binderCallsStatsConsumer must not be null"); 80 } 81 82 sBinderCallsStatsInitializer = binderCallsStatsConsumer; 83 } 84 85 /** @hide */ initializeBinderCallsStats(Context context)86 public static void initializeBinderCallsStats(Context context) { 87 if (sBinderCallsStatsInitializer == null) { 88 throw new IllegalStateException("sBinderCallsStatsInitializer has not been set"); 89 } 90 sBinderCallsStatsInitializer.accept(context); 91 } 92 93 /** 94 * Called by {@link SystemServiceRegistry}'s static initializer and registers BT service 95 * to {@link Context}, so that {@link Context#getSystemService} can return them. 96 * 97 * @throws IllegalStateException if this is called from anywhere besides 98 * {@link SystemServiceRegistry} 99 */ registerServiceWrappers()100 public static void registerServiceWrappers() { 101 SystemServiceRegistry.registerContextAwareService(Context.BLUETOOTH_SERVICE, 102 BluetoothManager.class, context -> new BluetoothManager(context)); 103 } 104 } 105