1 /* 2 * Copyright (C) 2023 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.adservices.data.kanon; 18 19 import android.content.Context; 20 21 import androidx.room.Database; 22 import androidx.room.RoomDatabase; 23 import androidx.room.TypeConverters; 24 25 import com.android.adservices.data.common.FledgeRoomConverters; 26 import com.android.adservices.service.common.compat.FileCompatUtils; 27 import com.android.adservices.shared.common.ApplicationContextSingleton; 28 29 import com.google.errorprone.annotations.concurrent.GuardedBy; 30 31 @Database( 32 entities = {DBServerParameters.class, DBClientParameters.class, DBKAnonMessage.class}, 33 version = KAnonDatabase.DATABASE_VERSION) 34 @TypeConverters({FledgeRoomConverters.class}) 35 public abstract class KAnonDatabase extends RoomDatabase { 36 private static final Object SINGLETON_LOCK = new Object(); 37 public static final int DATABASE_VERSION = 1; 38 public static final String DATABASE_NAME = FileCompatUtils.getAdservicesFilename("kanon.db"); 39 40 @GuardedBy("SINGLETON_LOCK") 41 public static volatile KAnonDatabase sSingleton; 42 43 /** Returns an instance of the KAnonDatabase given a context. */ getInstance()44 public static KAnonDatabase getInstance() { 45 KAnonDatabase singleReadResult = sSingleton; 46 if (singleReadResult != null) { 47 return singleReadResult; 48 } 49 50 synchronized (SINGLETON_LOCK) { 51 if (sSingleton == null) { 52 Context context = ApplicationContextSingleton.get(); 53 sSingleton = 54 FileCompatUtils.roomDatabaseBuilderHelper( 55 context, KAnonDatabase.class, DATABASE_NAME) 56 .fallbackToDestructiveMigration() 57 .build(); 58 } 59 return sSingleton; 60 } 61 } 62 63 /** 64 * @return a Dao to access entities in client_parameters. 65 */ clientParametersDao()66 public abstract ClientParametersDao clientParametersDao(); 67 68 /** 69 * @return a Dao to access entities in server_parameters. 70 */ serverParametersDao()71 public abstract ServerParametersDao serverParametersDao(); 72 73 /** 74 * @return a Dao to access entities in kanon_message table. 75 */ kAnonMessageDao()76 public abstract KAnonMessageDao kAnonMessageDao(); 77 } 78