1 /* 2 * Copyright 2020 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.bluetooth.btservice.activityattribution; 18 19 import android.util.Log; 20 21 import java.util.Objects; 22 23 /** 24 * Service used for attributes wakeup, wakelock and Bluetooth traffic into per-app and per-device 25 * based activities. 26 */ 27 public class ActivityAttributionService { 28 private boolean mCleaningUp; 29 private static ActivityAttributionService sActivityAttributionService; 30 private static final boolean DBG = false; 31 private static final String TAG = "ActivityAttributionService"; 32 33 ActivityAttributionNativeInterface mActivityAttributionNativeInterface; 34 35 /** Start and initialize the Activity Attribution service. */ start()36 public void start() { 37 debugLog("start()"); 38 39 if (sActivityAttributionService != null) { 40 Log.e(TAG, "start() called twice"); 41 return; 42 } 43 44 mActivityAttributionNativeInterface = 45 Objects.requireNonNull( 46 ActivityAttributionNativeInterface.getInstance(), 47 "ActivityAttributionNativeInterface " 48 + "cannot be null when ActivityAttributionService starts"); 49 50 // Mark service as started 51 setActivityAttributionService(this); 52 } 53 54 /** Cleans up the Activity Attribution service. */ cleanup()55 public void cleanup() { 56 debugLog("cleanup"); 57 if (mCleaningUp) { 58 debugLog("already doing cleanup"); 59 return; 60 } 61 62 mCleaningUp = true; 63 64 if (sActivityAttributionService == null) { 65 debugLog("cleanup() called before start()"); 66 return; 67 } 68 69 // Mark service as stopped 70 setActivityAttributionService(null); 71 72 // Cleanup native interface 73 mActivityAttributionNativeInterface.cleanup(); 74 mActivityAttributionNativeInterface = null; 75 } 76 77 /** Get the ActivityAttributionService instance */ getActivityAttributionService()78 public static synchronized ActivityAttributionService getActivityAttributionService() { 79 if (sActivityAttributionService == null) { 80 Log.w(TAG, "getActivityAttributionService(): service is NULL"); 81 return null; 82 } 83 84 if (!sActivityAttributionService.isAvailable()) { 85 Log.w(TAG, "getActivityAttributionService(): service is not available"); 86 return null; 87 } 88 return sActivityAttributionService; 89 } 90 91 /** Init JNI */ initJni()92 public void initJni() { 93 debugLog("initJni()"); 94 // Initialize native interface 95 mActivityAttributionNativeInterface.init(); 96 } 97 isAvailable()98 private boolean isAvailable() { 99 return !mCleaningUp; 100 } 101 setActivityAttributionService( ActivityAttributionService instance)102 private static synchronized void setActivityAttributionService( 103 ActivityAttributionService instance) { 104 debugLog("setActivityAttributionService(): set to: " + instance); 105 sActivityAttributionService = instance; 106 } 107 debugLog(String msg)108 private static void debugLog(String msg) { 109 if (DBG) { 110 Log.d(TAG, msg); 111 } 112 } 113 } 114