1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef DISTRIBUTEDDB_CONSTANT_H 17 #define DISTRIBUTEDDB_CONSTANT_H 18 19 #include <string> 20 21 namespace DistributedDB { 22 class DBConstant { 23 public: 24 static constexpr size_t MAX_KEY_SIZE = 1024; 25 static constexpr size_t MAX_VALUE_SIZE = 4194304; 26 static constexpr size_t MAX_BATCH_SIZE = 128; 27 static constexpr size_t MAX_DEV_LENGTH = 128; 28 static constexpr size_t MAX_TRANSACTION_KEY_VALUE_LENS = 512 * 1024 * 1024; // 512M 29 30 static constexpr size_t MAX_DATA_DIR_LENGTH = 512; 31 32 static constexpr size_t MAX_INKEYS_SIZE = 128; 33 static constexpr size_t MAX_SQL_ARGS_COUNT = 100; 34 static constexpr size_t MAX_IN_COUNT = 100; 35 36 static constexpr int DB_TYPE_LOCAL = 1; 37 static constexpr int DB_TYPE_MULTI_VER = 2; 38 static constexpr int DB_TYPE_SINGLE_VER = 3; 39 40 static constexpr int QUEUED_SYNC_LIMIT_DEFAULT = 32; 41 static constexpr int QUEUED_SYNC_LIMIT_MIN = 1; 42 static constexpr int QUEUED_SYNC_LIMIT_MAX = 4096; 43 44 static constexpr int MAX_DEVICES_SIZE = 100; 45 static constexpr int MAX_COMMIT_SIZE = 1000000; 46 static constexpr int MAX_ENTRIES_SIZE = 1000000; 47 48 static constexpr uint32_t MAX_COLUMN = 32767; 49 50 static constexpr int MAX_REMOTEDATA_SIZE = 4194304; // 4M. 51 52 static constexpr int DEFAULT_ITER_TIMES = 5000; 53 54 // In querySync, when getting query data finished, 55 // if the block size reach the half of max block size, will get deleted data next; 56 // if the block size not reach the half of max block size, will not get deleted data. 57 static constexpr float QUERY_SYNC_THRESHOLD = 0.50; 58 59 static constexpr uint64_t MAX_USER_ID_LENGTH = 128; 60 static constexpr uint64_t MAX_APP_ID_LENGTH = 128; 61 static constexpr uint64_t MAX_STORE_ID_LENGTH = 128; 62 static constexpr uint64_t MAX_SUB_USER_LENGTH = 128; 63 64 static const std::string MULTI_SUB_DIR; 65 static const std::string SINGLE_SUB_DIR; 66 static const std::string LOCAL_SUB_DIR; 67 68 static const std::string MAINDB_DIR; 69 static const std::string METADB_DIR; 70 static const std::string CACHEDB_DIR; 71 72 static constexpr const char *LOCAL_DATABASE_NAME = "local"; 73 static constexpr const char *MULTI_VER_DATA_STORE = "multi_ver_data"; 74 static constexpr const char *MULTI_VER_COMMIT_STORE = "commit_logs"; 75 static constexpr const char *MULTI_VER_VALUE_STORE = "value_storage"; 76 static constexpr const char *MULTI_VER_META_STORE = "meta_storage"; 77 static const std::string SINGLE_VER_DATA_STORE; 78 static const std::string SINGLE_VER_META_STORE; 79 static const std::string SINGLE_VER_CACHE_STORE; 80 81 static constexpr const char *SQLITE_URL_PRE = "file:"; 82 static constexpr const char *DB_EXTENSION = ".db"; 83 static constexpr const char *SQLITE_MEMDB_IDENTIFY = "?mode=memory&cache=shared"; 84 85 static constexpr const char *SCHEMA_KEY = "schemaKey"; 86 static const std::string RELATIONAL_SCHEMA_KEY; 87 static const std::string RELATIONAL_TRACKER_SCHEMA_KEY; 88 89 static constexpr const char *RD_KV_COLLECTION_MODE = "{\"mode\" : \"kv\"}"; 90 static constexpr const char *RD_KV_HASH_COLLECTION_MODE = "{\"mode\" : \"kv\",\"indextype\" : \"hash\"}"; 91 92 static constexpr const char *PATH_POSTFIX_UNPACKED = "_unpacked"; 93 static constexpr const char *PATH_POSTFIX_IMPORT_BACKUP = "_import_bak"; 94 static constexpr const char *PATH_POSTFIX_IMPORT_ORIGIN = "_import_ori"; 95 static constexpr const char *PATH_POSTFIX_IMPORT_DUP = "_import_dup"; 96 static constexpr const char *PATH_POSTFIX_EXPORT_BACKUP = "_export_bak"; 97 // use for make sure create datebase and set label complete 98 static constexpr const char *PATH_POSTFIX_DB_INCOMPLETE = "_db_incomplete.lock"; 99 100 static constexpr const char *REKEY_FILENAME_POSTFIX_PRE = "_ctrl_pre"; 101 static constexpr const char *REKEY_FILENAME_POSTFIX_OK = "_ctrl_ok"; 102 static constexpr const char *UPGRADE_POSTFIX = "_upgrade.lock"; 103 // used for make sure meta split upgrade atomically 104 static constexpr const char *SET_SECOPT_POSTFIX = "_secopt.lock"; 105 static constexpr const char *PATH_BACKUP_POSTFIX = "_bak"; 106 107 static constexpr const char *ID_CONNECTOR = "-"; 108 109 static constexpr const char *DELETE_KVSTORE_REMOVING = "_removing"; 110 static constexpr const char *DB_LOCK_POSTFIX = ".lock"; 111 112 static constexpr const char *SUBSCRIBE_QUERY_PREFIX = "subscribe_query_"; 113 114 static constexpr const char *TRIGGER_REFERENCES_NEW = "NEW."; 115 static constexpr const char *TRIGGER_REFERENCES_OLD = "OLD."; 116 117 static const std::string UPDATE_META_FUNC; 118 119 // Prefix Key in meta db 120 static constexpr const char *DEVICEID_PREFIX_KEY = "deviceId"; 121 static constexpr const char *QUERY_SYNC_PREFIX_KEY = "querySync"; 122 static constexpr const char *DELETE_SYNC_PREFIX_KEY = "deleteSync"; 123 124 static const size_t MAX_NORMAL_PACK_ITEM_SIZE = 4000; 125 static const size_t MAX_HPMODE_PACK_ITEM_SIZE = 2000; // slide window mode to reduce last ack transfer time 126 127 static constexpr uint32_t MIN_MTU_SIZE = 1024; // 1KB 128 static constexpr uint32_t MAX_MTU_SIZE = 5242880; // 5MB 129 130 static constexpr uint32_t MIN_TIMEOUT = 5000; // 5s 131 static constexpr uint32_t MAX_TIMEOUT = 60000; // 60s 132 static constexpr uint32_t MAX_SYNC_TIMEOUT = 300000; // 300s 133 static constexpr int INFINITE_WAIT = -1; // -1 is infinite waiting 134 135 static constexpr uint8_t DEFAULT_COMPTRESS_RATE = 100; 136 137 static constexpr size_t MAX_SYNC_BLOCK_SIZE = 31457280; // 30MB 138 139 static constexpr int DOUBLE_PRECISION = 15; 140 static constexpr int MAX_DISTRIBUTED_TABLE_COUNT = 32; 141 142 static constexpr uint64_t MAX_LOG_SIZE_HIGH = 0x400000000ULL; // 16GB 143 static constexpr uint64_t MAX_LOG_SIZE_LOW = 0x400000ULL; // 4MB 144 static constexpr uint64_t MAX_LOG_SIZE_DEFAULT = 0x40000000ULL; // 1GB 145 146 static constexpr int DEF_LIFE_CYCLE_TIME = 60000; // 60S 147 148 static constexpr int RELATIONAL_LOG_TABLE_FIELD_NUM = 7; // field num is relational distributed log table 149 150 static constexpr uint64_t IGNORE_CONNECTION_ID = 0; 151 // Soft limit of a connection observer count. 152 static constexpr int MAX_OBSERVER_COUNT = 8; 153 154 // For relational 155 static const std::string SYSTEM_TABLE_PREFIX; 156 static const std::string RELATIONAL_PREFIX; 157 static const std::string TIMESTAMP_ALIAS; 158 static constexpr const char *LOG_POSTFIX = "_log"; 159 static constexpr const char *META_TABLE_POSTFIX = "metadata"; 160 161 static constexpr const char *LOG_TABLE_VERSION_3 = "3.0"; 162 static constexpr const char *LOG_TABLE_VERSION_5_1 = "5.01"; 163 static constexpr const char *LOG_TABLE_VERSION_5_3 = "5.03"; // add sharing_resource field 164 static constexpr const char *LOG_TABLE_VERSION_5_5 = "5.05"; // add status field 165 static constexpr const char *LOG_TABLE_VERSION_5_8 = "5.08"; // migrate cursor to meta table 166 static constexpr const char *LOG_TABLE_VERSION_5_9 = "5.09"; // insert retains the old version 167 static constexpr const char *LOG_TABLE_VERSION_CURRENT = LOG_TABLE_VERSION_5_9; 168 169 static const std::string LOG_TABLE_VERSION_KEY; 170 171 static constexpr const char *REMOTE_DEVICE_SCHEMA_KEY_PREFIX = "remote_device_schema_"; 172 173 static constexpr uint32_t MAX_CONDITION_KEY_LEN = 128; 174 static constexpr uint32_t MAX_CONDITION_VALUE_LEN = 128; 175 static constexpr uint32_t MAX_CONDITION_COUNT = 32; 176 177 static constexpr uint32_t REMOTE_QUERY_MAX_SQL_LEN = 1000000U; 178 179 static constexpr int HASH_KEY_SIZE = 32; // size of SHA256_DIGEST_LENGTH 180 181 static constexpr const char *TABLE_IS_DROPPED = "table_is_dropped_"; 182 183 static constexpr const char *SQLITE_INNER_ROWID = "_rowid_"; 184 static constexpr int32_t DEFAULT_ROW_ID = -1; 185 static constexpr int STR_TO_LL_BY_DEVALUE = 10; 186 // key in meta_data 187 static constexpr const char *LOCALTIME_OFFSET_KEY = "localTimeOffset"; 188 189 static constexpr uint64_t OBSERVER_CHANGES_MASK = 0XF00; 190 191 static constexpr const char *STORAGE_TYPE_LONG = "long"; 192 }; 193 } // namespace DistributedDB 194 #endif // DISTRIBUTEDDB_CONSTANT_H 195