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| 1 | <?php |
| 2 | |
| 3 | namespace Wikimedia\Rdbms; |
| 4 | |
| 5 | use InvalidArgumentException; |
| 6 | use Stringable; |
| 7 | |
| 8 | /** |
| 9 | * Helper class used for automatically re-using IDatabase connections and lazily |
| 10 | * establishing the actual network connection to a database host. |
| 11 | * |
| 12 | * It does this by deferring to ILoadBalancer::getConnectionInternal, which in |
| 13 | * turn ensures we share and re-use a single connection for a given database |
| 14 | * wherever possible. |
| 15 | * |
| 16 | * This class previously used an RAII-style pattern where connections would be |
| 17 | * claimed from a pool, and then added back to the pool for re-use only after |
| 18 | * the calling code's variable for this object went out of scope (a __destruct |
| 19 | * got called when the calling function returns or throws). This is no longer |
| 20 | * needed today as LoadBalancer now permits re-use internally even for |
| 21 | * overlapping callers, where two pieces of code may both obtain their own |
| 22 | * DBConnRef object and where both are used alternatingly, and yet still share |
| 23 | * the same connection. |
| 24 | * |
| 25 | * @par Example: |
| 26 | * @code |
| 27 | * function getRowData() { |
| 28 | * $conn = $this->lb->getConnection( DB_REPLICA ); |
| 29 | * $row = $conn->select( ... ); |
| 30 | * return $row ? (array)$row : false; |
| 31 | * } |
| 32 | * @endcode |
| 33 | * |
| 34 | * @ingroup Database |
| 35 | * @since 1.22 |
| 36 | */ |
| 37 | class DBConnRef implements Stringable, IMaintainableDatabase, IDatabaseForOwner { |
| 38 | /** @var ILoadBalancer */ |
| 39 | private $lb; |
| 40 | /** @var Database|null Live connection handle */ |
| 41 | private $conn; |
| 42 | /** |
| 43 | * @var array Map of (DBConnRef::FLD_* constant => connection parameter) |
| 44 | * @phan-var array{0:int,1:array|string|false,2:DatabaseDomain,3:int} |
| 45 | */ |
| 46 | private $params; |
| 47 | /** @var int One of DB_PRIMARY/DB_REPLICA */ |
| 48 | private $role; |
| 49 | |
| 50 | /** |
| 51 | * @var int Reference to the $modcount passed to the constructor. |
| 52 | * $conn is valid if $modCountRef and $modCountFix are the same. |
| 53 | */ |
| 54 | private $modCountRef; |
| 55 | |
| 56 | /** |
| 57 | * @var int Last known good value of $modCountRef |
| 58 | * $conn is valid if $modCountRef and $modCountFix are the same. |
| 59 | */ |
| 60 | private $modCountFix; |
| 61 | |
| 62 | private const FLD_INDEX = 0; |
| 63 | private const FLD_GROUPS = 1; |
| 64 | private const FLD_DOMAIN = 2; |
| 65 | private const FLD_FLAGS = 3; |
| 66 | |
| 67 | /** |
| 68 | * @internal May not be used outside Rdbms LoadBalancer |
| 69 | * @param ILoadBalancer $lb Connection manager for $conn |
| 70 | * @param array $params [server index, query groups, domain, flags] |
| 71 | * @param int $role The type of connection asked for; one of DB_PRIMARY/DB_REPLICA |
| 72 | * @param null|int &$modcount Reference to a modification counter. This is for |
| 73 | * LoadBalancer::reconfigure to indicate that a new connection should be acquired. |
| 74 | */ |
| 75 | public function __construct( ILoadBalancer $lb, $params, $role, &$modcount = 0 ) { |
| 76 | if ( !is_array( $params ) || count( $params ) < 4 || $params[self::FLD_DOMAIN] === false ) { |
| 77 | throw new InvalidArgumentException( "Missing lazy connection arguments." ); |
| 78 | } |
| 79 | |
| 80 | $params[self::FLD_DOMAIN] = DatabaseDomain::newFromId( $params[self::FLD_DOMAIN] ); |
| 81 | |
| 82 | $this->lb = $lb; |
| 83 | $this->params = $params; |
| 84 | $this->role = $role; |
| 85 | |
| 86 | // $this->conn is valid as long as $this->modCountRef and $this->modCountFix are the same. |
| 87 | $this->modCountRef = &$modcount; // remember reference |
| 88 | $this->modCountFix = $modcount; // remember current value |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * Connect to the database if we are not already connected. |
| 93 | */ |
| 94 | public function ensureConnection() { |
| 95 | if ( $this->modCountFix !== $this->modCountRef ) { |
| 96 | // Discard existing connection, unless we are in an ongoing transaction. |
| 97 | // This is triggered by LoadBalancer::reconfigure(), to allow changed settings |
| 98 | // to take effect. The primary use case are replica servers being taken out of |
| 99 | // rotation, or the primary database changing. |
| 100 | if ( $this->conn && !$this->conn->trxLevel() ) { |
| 101 | $this->conn->close(); |
| 102 | $this->conn = null; |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | if ( $this->conn === null ) { |
| 107 | $this->conn = $this->lb->getConnectionInternal( |
| 108 | $this->params[self::FLD_INDEX], |
| 109 | $this->params[self::FLD_GROUPS], |
| 110 | $this->params[self::FLD_DOMAIN]->getId(), |
| 111 | $this->params[self::FLD_FLAGS] |
| 112 | ); |
| 113 | $this->modCountFix = $this->modCountRef; |
| 114 | } |
| 115 | |
| 116 | if ( !$this->params[self::FLD_DOMAIN]->equals( $this->conn->getDomainID() ) ) { |
| 117 | // The underlying connection handle is likely being shared by other DBConnRef |
| 118 | // instances in a load balancer. Make sure that each one routes queries by their |
| 119 | // owner function to the domain that the owner expects. |
| 120 | $this->conn->selectDomain( $this->params[self::FLD_DOMAIN] ); |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | public function __call( $name, array $arguments ) { |
| 125 | $this->ensureConnection(); |
| 126 | |
| 127 | return $this->conn->$name( ...$arguments ); |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * @return int DB_PRIMARY when this *requires* the primary DB, otherwise DB_REPLICA |
| 132 | * @since 1.33 |
| 133 | */ |
| 134 | public function getReferenceRole() { |
| 135 | return $this->role; |
| 136 | } |
| 137 | |
| 138 | public function getServerInfo() { |
| 139 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 140 | } |
| 141 | |
| 142 | public function trxLevel() { |
| 143 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 144 | } |
| 145 | |
| 146 | public function trxTimestamp() { |
| 147 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 148 | } |
| 149 | |
| 150 | public function explicitTrxActive() { |
| 151 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 152 | } |
| 153 | |
| 154 | public function tablePrefix( $prefix = null ) { |
| 155 | if ( $prefix !== null ) { |
| 156 | // Disallow things that might confuse the LoadBalancer tracking |
| 157 | throw $this->getDomainChangeException(); |
| 158 | } |
| 159 | |
| 160 | if ( $this->conn === null ) { |
| 161 | // Avoid triggering a database connection |
| 162 | $prefix = $this->params[self::FLD_DOMAIN]->getTablePrefix(); |
| 163 | } else { |
| 164 | // This will just return the prefix |
| 165 | $prefix = $this->__call( __FUNCTION__, func_get_args() ); |
| 166 | } |
| 167 | |
| 168 | return $prefix; |
| 169 | } |
| 170 | |
| 171 | public function dbSchema( $schema = null ) { |
| 172 | if ( $schema !== null ) { |
| 173 | // Disallow things that might confuse the LoadBalancer tracking |
| 174 | throw $this->getDomainChangeException(); |
| 175 | } |
| 176 | |
| 177 | if ( $this->conn === null ) { |
| 178 | // Avoid triggering a database connection |
| 179 | $schema = (string)( $this->params[self::FLD_DOMAIN]->getSchema() ); |
| 180 | } else { |
| 181 | // This will just return the schema |
| 182 | $schema = $this->__call( __FUNCTION__, func_get_args() ); |
| 183 | } |
| 184 | |
| 185 | return $schema; |
| 186 | } |
| 187 | |
| 188 | public function getLBInfo( $name = null ) { |
| 189 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 190 | } |
| 191 | |
| 192 | public function setLBInfo( $nameOrArray, $value = null ) { |
| 193 | // @phan-suppress-previous-line PhanPluginNeverReturnMethod |
| 194 | // Disallow things that might confuse the LoadBalancer tracking |
| 195 | throw $this->getDomainChangeException(); |
| 196 | } |
| 197 | |
| 198 | public function implicitOrderby() { |
| 199 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 200 | } |
| 201 | |
| 202 | public function lastDoneWrites() { |
| 203 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 204 | } |
| 205 | |
| 206 | public function writesPending() { |
| 207 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 208 | } |
| 209 | |
| 210 | public function writesOrCallbacksPending() { |
| 211 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 212 | } |
| 213 | |
| 214 | public function pendingWriteQueryDuration( $type = self::ESTIMATE_TOTAL ) { |
| 215 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 216 | } |
| 217 | |
| 218 | public function pendingWriteCallers() { |
| 219 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 220 | } |
| 221 | |
| 222 | public function isOpen() { |
| 223 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 224 | } |
| 225 | |
| 226 | public function setFlag( $flag, $remember = self::REMEMBER_NOTHING ) { |
| 227 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 228 | } |
| 229 | |
| 230 | public function clearFlag( $flag, $remember = self::REMEMBER_NOTHING ) { |
| 231 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 232 | } |
| 233 | |
| 234 | public function restoreFlags( $state = self::RESTORE_PRIOR ) { |
| 235 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 236 | } |
| 237 | |
| 238 | public function getFlag( $flag ) { |
| 239 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 240 | } |
| 241 | |
| 242 | public function getProperty( $name ) { |
| 243 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 244 | } |
| 245 | |
| 246 | public function getDomainID() { |
| 247 | if ( $this->conn === null ) { |
| 248 | // Avoid triggering a database connection |
| 249 | return $this->params[self::FLD_DOMAIN]->getId(); |
| 250 | } |
| 251 | |
| 252 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 253 | } |
| 254 | |
| 255 | public function getType() { |
| 256 | if ( $this->conn === null ) { |
| 257 | // Avoid triggering a database connection |
| 258 | $index = $this->normalizeServerIndex( $this->params[self::FLD_INDEX] ); |
| 259 | if ( $index >= 0 ) { |
| 260 | // In theory, if $index is DB_REPLICA, the type could vary |
| 261 | return $this->lb->getServerType( $index ); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 266 | } |
| 267 | |
| 268 | public function insertId() { |
| 269 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 270 | } |
| 271 | |
| 272 | public function lastErrno() { |
| 273 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 274 | } |
| 275 | |
| 276 | public function lastError() { |
| 277 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 278 | } |
| 279 | |
| 280 | public function affectedRows() { |
| 281 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 282 | } |
| 283 | |
| 284 | public function getSoftwareLink() { |
| 285 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 286 | } |
| 287 | |
| 288 | public function getServerVersion() { |
| 289 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 290 | } |
| 291 | |
| 292 | public function close( $fname = __METHOD__ ) { |
| 293 | // @phan-suppress-previous-line PhanPluginNeverReturnMethod |
| 294 | throw new DBUnexpectedError( $this->conn, 'Cannot close shared connection.' ); |
| 295 | } |
| 296 | |
| 297 | public function query( $sql, $fname = __METHOD__, $flags = 0 ) { |
| 298 | if ( $this->role !== ILoadBalancer::DB_PRIMARY ) { |
| 299 | $flags |= IDatabase::QUERY_REPLICA_ROLE; |
| 300 | } |
| 301 | |
| 302 | return $this->__call( __FUNCTION__, [ $sql, $fname, $flags ] ); |
| 303 | } |
| 304 | |
| 305 | public function newSelectQueryBuilder(): SelectQueryBuilder { |
| 306 | // Use $this not $this->conn so that the domain is preserved (T326377) |
| 307 | return new SelectQueryBuilder( $this ); |
| 308 | } |
| 309 | |
| 310 | public function newUnionQueryBuilder(): UnionQueryBuilder { |
| 311 | // Use $this not $this->conn so that the domain is preserved (T326377) |
| 312 | return new UnionQueryBuilder( $this ); |
| 313 | } |
| 314 | |
| 315 | public function newUpdateQueryBuilder(): UpdateQueryBuilder { |
| 316 | // Use $this not $this->conn so that the domain is preserved (T326377) |
| 317 | return new UpdateQueryBuilder( $this ); |
| 318 | } |
| 319 | |
| 320 | public function newDeleteQueryBuilder(): DeleteQueryBuilder { |
| 321 | // Use $this not $this->conn so that the domain is preserved (T326377) |
| 322 | return new DeleteQueryBuilder( $this ); |
| 323 | } |
| 324 | |
| 325 | public function newInsertQueryBuilder(): InsertQueryBuilder { |
| 326 | // Use $this not $this->conn so that the domain is preserved (T326377) |
| 327 | return new InsertQueryBuilder( $this ); |
| 328 | } |
| 329 | |
| 330 | public function newReplaceQueryBuilder(): ReplaceQueryBuilder { |
| 331 | // Use $this not $this->conn so that the domain is preserved (T326377) |
| 332 | return new ReplaceQueryBuilder( $this ); |
| 333 | } |
| 334 | |
| 335 | public function selectField( |
| 336 | $tables, $var, $cond = '', $fname = __METHOD__, $options = [], $join_conds = [] |
| 337 | ) { |
| 338 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 339 | } |
| 340 | |
| 341 | public function selectFieldValues( |
| 342 | $tables, $var, $cond = '', $fname = __METHOD__, $options = [], $join_conds = [] |
| 343 | ): array { |
| 344 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 345 | } |
| 346 | |
| 347 | public function select( |
| 348 | $tables, $vars, $conds = '', $fname = __METHOD__, |
| 349 | $options = [], $join_conds = [] |
| 350 | ) { |
| 351 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 352 | } |
| 353 | |
| 354 | public function selectSQLText( |
| 355 | $tables, $vars, $conds = '', $fname = __METHOD__, |
| 356 | $options = [], $join_conds = [] |
| 357 | ) { |
| 358 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 359 | } |
| 360 | |
| 361 | public function limitResult( $sql, $limit, $offset = false ) { |
| 362 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 363 | } |
| 364 | |
| 365 | public function selectRow( |
| 366 | $tables, $vars, $conds, $fname = __METHOD__, |
| 367 | $options = [], $join_conds = [] |
| 368 | ) { |
| 369 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 370 | } |
| 371 | |
| 372 | public function estimateRowCount( |
| 373 | $tables, $vars = '*', $conds = '', $fname = __METHOD__, $options = [], $join_conds = [] |
| 374 | ): int { |
| 375 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 376 | } |
| 377 | |
| 378 | public function selectRowCount( |
| 379 | $tables, $vars = '*', $conds = '', $fname = __METHOD__, $options = [], $join_conds = [] |
| 380 | ): int { |
| 381 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 382 | } |
| 383 | |
| 384 | public function lockForUpdate( |
| 385 | $table, $conds = '', $fname = __METHOD__, $options = [], $join_conds = [] |
| 386 | ) { |
| 387 | $this->assertRoleAllowsWrites(); |
| 388 | |
| 389 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 390 | } |
| 391 | |
| 392 | public function fieldExists( $table, $field, $fname = __METHOD__ ) { |
| 393 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 394 | } |
| 395 | |
| 396 | public function indexExists( $table, $index, $fname = __METHOD__ ) { |
| 397 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 398 | } |
| 399 | |
| 400 | public function tableExists( $table, $fname = __METHOD__ ) { |
| 401 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 402 | } |
| 403 | |
| 404 | public function insert( $table, $rows, $fname = __METHOD__, $options = [] ) { |
| 405 | $this->assertRoleAllowsWrites(); |
| 406 | |
| 407 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 408 | } |
| 409 | |
| 410 | public function update( $table, $set, $conds, $fname = __METHOD__, $options = [] ) { |
| 411 | $this->assertRoleAllowsWrites(); |
| 412 | |
| 413 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 414 | } |
| 415 | |
| 416 | public function buildComparison( string $op, array $conds ): string { |
| 417 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 418 | } |
| 419 | |
| 420 | public function makeList( array $a, $mode = self::LIST_COMMA ) { |
| 421 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 422 | } |
| 423 | |
| 424 | public function makeWhereFrom2d( $data, $baseKey, $subKey ) { |
| 425 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 426 | } |
| 427 | |
| 428 | public function factorConds( $condsArray ) { |
| 429 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 430 | } |
| 431 | |
| 432 | public function bitNot( $field ) { |
| 433 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 434 | } |
| 435 | |
| 436 | public function bitAnd( $fieldLeft, $fieldRight ) { |
| 437 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 438 | } |
| 439 | |
| 440 | public function bitOr( $fieldLeft, $fieldRight ) { |
| 441 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 442 | } |
| 443 | |
| 444 | public function buildConcat( $stringList ) { |
| 445 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 446 | } |
| 447 | |
| 448 | public function buildGroupConcatField( |
| 449 | $delim, $tables, $field, $conds = '', $join_conds = [] |
| 450 | ) { |
| 451 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 452 | } |
| 453 | |
| 454 | public function buildGreatest( $fields, $values ) { |
| 455 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 456 | } |
| 457 | |
| 458 | public function buildLeast( $fields, $values ) { |
| 459 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 460 | } |
| 461 | |
| 462 | public function buildSubstring( $input, $startPosition, $length = null ) { |
| 463 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 464 | } |
| 465 | |
| 466 | public function buildStringCast( $field ) { |
| 467 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 468 | } |
| 469 | |
| 470 | public function buildIntegerCast( $field ) { |
| 471 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 472 | } |
| 473 | |
| 474 | public function buildExcludedValue( $column ) { |
| 475 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 476 | } |
| 477 | |
| 478 | public function buildSelectSubquery( |
| 479 | $tables, $vars, $conds = '', $fname = __METHOD__, |
| 480 | $options = [], $join_conds = [] |
| 481 | ) { |
| 482 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 483 | } |
| 484 | |
| 485 | public function databasesAreIndependent() { |
| 486 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 487 | } |
| 488 | |
| 489 | public function selectDomain( $domain ) { |
| 490 | // @phan-suppress-previous-line PhanPluginNeverReturnMethod |
| 491 | // Disallow things that might confuse the LoadBalancer tracking |
| 492 | throw $this->getDomainChangeException(); |
| 493 | } |
| 494 | |
| 495 | public function getDBname() { |
| 496 | if ( $this->conn === null ) { |
| 497 | // Avoid triggering a database connection |
| 498 | return $this->params[self::FLD_DOMAIN]->getDatabase(); |
| 499 | } |
| 500 | |
| 501 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 502 | } |
| 503 | |
| 504 | public function getServer() { |
| 505 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 506 | } |
| 507 | |
| 508 | public function getServerName() { |
| 509 | if ( $this->conn === null ) { |
| 510 | // Avoid triggering a database connection |
| 511 | $index = $this->normalizeServerIndex( $this->params[self::FLD_INDEX] ); |
| 512 | if ( $index >= 0 ) { |
| 513 | // If $index is DB_REPLICA, the server name could vary |
| 514 | return $this->lb->getServerName( $index ); |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 519 | } |
| 520 | |
| 521 | public function addQuotes( $s ) { |
| 522 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 523 | } |
| 524 | |
| 525 | public function expr( string $field, string $op, $value ): Expression { |
| 526 | // Does not use __call here to delay creating the db connection |
| 527 | return new Expression( $field, $op, $value ); |
| 528 | } |
| 529 | |
| 530 | public function andExpr( array $conds ): AndExpressionGroup { |
| 531 | // Does not use __call here to delay creating the db connection |
| 532 | return AndExpressionGroup::newFromArray( $conds ); |
| 533 | } |
| 534 | |
| 535 | public function orExpr( array $conds ): OrExpressionGroup { |
| 536 | // Does not use __call here to delay creating the db connection |
| 537 | return OrExpressionGroup::newFromArray( $conds ); |
| 538 | } |
| 539 | |
| 540 | public function addIdentifierQuotes( $s ) { |
| 541 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 542 | } |
| 543 | |
| 544 | public function buildLike( $param, ...$params ) { |
| 545 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 546 | } |
| 547 | |
| 548 | public function anyChar() { |
| 549 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 550 | } |
| 551 | |
| 552 | public function anyString() { |
| 553 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 554 | } |
| 555 | |
| 556 | public function replace( $table, $uniqueKeys, $rows, $fname = __METHOD__ ) { |
| 557 | $this->assertRoleAllowsWrites(); |
| 558 | |
| 559 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 560 | } |
| 561 | |
| 562 | public function upsert( |
| 563 | $table, array $rows, $uniqueKeys, array $set, $fname = __METHOD__ |
| 564 | ) { |
| 565 | $this->assertRoleAllowsWrites(); |
| 566 | |
| 567 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 568 | } |
| 569 | |
| 570 | public function deleteJoin( |
| 571 | $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = __METHOD__ |
| 572 | ) { |
| 573 | $this->assertRoleAllowsWrites(); |
| 574 | |
| 575 | $this->__call( __FUNCTION__, func_get_args() ); |
| 576 | } |
| 577 | |
| 578 | public function delete( $table, $conds, $fname = __METHOD__ ) { |
| 579 | $this->assertRoleAllowsWrites(); |
| 580 | |
| 581 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 582 | } |
| 583 | |
| 584 | public function insertSelect( |
| 585 | $destTable, $srcTable, $varMap, $conds, |
| 586 | $fname = __METHOD__, $insertOptions = [], $selectOptions = [], $selectJoinConds = [] |
| 587 | ) { |
| 588 | $this->assertRoleAllowsWrites(); |
| 589 | |
| 590 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 591 | } |
| 592 | |
| 593 | public function unionSupportsOrderAndLimit() { |
| 594 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 595 | } |
| 596 | |
| 597 | public function unionQueries( $sqls, $all, $options = [] ) { |
| 598 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 599 | } |
| 600 | |
| 601 | public function conditional( $cond, $caseTrueExpression, $caseFalseExpression ) { |
| 602 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 603 | } |
| 604 | |
| 605 | public function strreplace( $orig, $old, $new ) { |
| 606 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 607 | } |
| 608 | |
| 609 | public function primaryPosWait( DBPrimaryPos $pos, $timeout ) { |
| 610 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 611 | } |
| 612 | |
| 613 | public function getPrimaryPos() { |
| 614 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 615 | } |
| 616 | |
| 617 | public function serverIsReadOnly() { |
| 618 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 619 | } |
| 620 | |
| 621 | public function onTransactionResolution( callable $callback, $fname = __METHOD__ ) { |
| 622 | // DB_REPLICA role: caller might want to refresh cache after a REPEATABLE-READ snapshot |
| 623 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 624 | } |
| 625 | |
| 626 | public function onTransactionCommitOrIdle( callable $callback, $fname = __METHOD__ ) { |
| 627 | // DB_REPLICA role: caller might want to refresh cache after a REPEATABLE-READ snapshot |
| 628 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 629 | } |
| 630 | |
| 631 | public function onTransactionPreCommitOrIdle( callable $callback, $fname = __METHOD__ ) { |
| 632 | // DB_REPLICA role: caller might want to refresh cache after a cache mutex is released |
| 633 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 634 | } |
| 635 | |
| 636 | public function setTransactionListener( $name, ?callable $callback = null ) { |
| 637 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 638 | } |
| 639 | |
| 640 | public function startAtomic( |
| 641 | $fname = __METHOD__, $cancelable = IDatabase::ATOMIC_NOT_CANCELABLE |
| 642 | ) { |
| 643 | // Don't call assertRoleAllowsWrites(); caller might want a REPEATABLE-READ snapshot |
| 644 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 645 | } |
| 646 | |
| 647 | public function endAtomic( $fname = __METHOD__ ) { |
| 648 | // Don't call assertRoleAllowsWrites(); caller might want a REPEATABLE-READ snapshot |
| 649 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 650 | } |
| 651 | |
| 652 | public function cancelAtomic( $fname = __METHOD__, ?AtomicSectionIdentifier $sectionId = null ) { |
| 653 | // Don't call assertRoleAllowsWrites(); caller might want a REPEATABLE-READ snapshot |
| 654 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 655 | } |
| 656 | |
| 657 | public function doAtomicSection( |
| 658 | $fname, callable $callback, $cancelable = self::ATOMIC_NOT_CANCELABLE |
| 659 | ) { |
| 660 | // Don't call assertRoleAllowsWrites(); caller might want a REPEATABLE-READ snapshot |
| 661 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 662 | } |
| 663 | |
| 664 | public function begin( $fname = __METHOD__, $mode = IDatabase::TRANSACTION_EXPLICIT ) { |
| 665 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 666 | } |
| 667 | |
| 668 | public function commit( $fname = __METHOD__, $flush = self::FLUSHING_ONE ) { |
| 669 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 670 | } |
| 671 | |
| 672 | public function rollback( $fname = __METHOD__, $flush = self::FLUSHING_ONE ) { |
| 673 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 674 | } |
| 675 | |
| 676 | public function flushSession( $fname = __METHOD__, $flush = self::FLUSHING_ONE ) { |
| 677 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 678 | } |
| 679 | |
| 680 | public function flushSnapshot( $fname = __METHOD__, $flush = self::FLUSHING_ONE ) { |
| 681 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 682 | } |
| 683 | |
| 684 | public function timestamp( $ts = 0 ) { |
| 685 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 686 | } |
| 687 | |
| 688 | public function timestampOrNull( $ts = null ) { |
| 689 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 690 | } |
| 691 | |
| 692 | public function ping( &$rtt = null ) { |
| 693 | return func_num_args() |
| 694 | ? $this->__call( __FUNCTION__, [ &$rtt ] ) |
| 695 | : $this->__call( __FUNCTION__, [] ); // method cares about null vs missing |
| 696 | } |
| 697 | |
| 698 | public function getLag() { |
| 699 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 700 | } |
| 701 | |
| 702 | public function getSessionLagStatus() { |
| 703 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 704 | } |
| 705 | |
| 706 | public function encodeBlob( $b ) { |
| 707 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 708 | } |
| 709 | |
| 710 | public function decodeBlob( $b ) { |
| 711 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 712 | } |
| 713 | |
| 714 | public function setSessionOptions( array $options ) { |
| 715 | $this->__call( __FUNCTION__, func_get_args() ); |
| 716 | } |
| 717 | |
| 718 | public function setSchemaVars( $vars ) { |
| 719 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 720 | } |
| 721 | |
| 722 | public function lockIsFree( $lockName, $method ) { |
| 723 | $this->assertRoleAllowsWrites(); |
| 724 | |
| 725 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 726 | } |
| 727 | |
| 728 | public function lock( $lockName, $method, $timeout = 5, $flags = 0 ) { |
| 729 | $this->assertRoleAllowsWrites(); |
| 730 | |
| 731 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 732 | } |
| 733 | |
| 734 | public function unlock( $lockName, $method ) { |
| 735 | $this->assertRoleAllowsWrites(); |
| 736 | |
| 737 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 738 | } |
| 739 | |
| 740 | public function getScopedLockAndFlush( $lockKey, $fname, $timeout ) { |
| 741 | $this->assertRoleAllowsWrites(); |
| 742 | |
| 743 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 744 | } |
| 745 | |
| 746 | public function getInfinity() { |
| 747 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 748 | } |
| 749 | |
| 750 | public function encodeExpiry( $expiry ) { |
| 751 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 752 | } |
| 753 | |
| 754 | public function decodeExpiry( $expiry, $format = TS_MW ) { |
| 755 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 756 | } |
| 757 | |
| 758 | public function isReadOnly() { |
| 759 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 760 | } |
| 761 | |
| 762 | public function setTableAliases( array $aliases ) { |
| 763 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 764 | } |
| 765 | |
| 766 | public function getTableAliases() { |
| 767 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 768 | } |
| 769 | |
| 770 | public function setIndexAliases( array $aliases ) { |
| 771 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 772 | } |
| 773 | |
| 774 | public function tableName( $name, $format = 'quoted' ) { |
| 775 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 776 | } |
| 777 | |
| 778 | public function tableNames( ...$tables ) { |
| 779 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 780 | } |
| 781 | |
| 782 | public function tableNamesN( ...$tables ) { |
| 783 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 784 | } |
| 785 | |
| 786 | public function sourceFile( |
| 787 | $filename, |
| 788 | ?callable $lineCallback = null, |
| 789 | ?callable $resultCallback = null, |
| 790 | $fname = false, |
| 791 | ?callable $inputCallback = null |
| 792 | ) { |
| 793 | $this->assertRoleAllowsWrites(); |
| 794 | |
| 795 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 796 | } |
| 797 | |
| 798 | public function sourceStream( |
| 799 | $fp, |
| 800 | ?callable $lineCallback = null, |
| 801 | ?callable $resultCallback = null, |
| 802 | $fname = __METHOD__, |
| 803 | ?callable $inputCallback = null |
| 804 | ) { |
| 805 | $this->assertRoleAllowsWrites(); |
| 806 | |
| 807 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 808 | } |
| 809 | |
| 810 | public function dropTable( $table, $fname = __METHOD__ ) { |
| 811 | $this->assertRoleAllowsWrites(); |
| 812 | |
| 813 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 814 | } |
| 815 | |
| 816 | public function truncateTable( $table, $fname = __METHOD__ ) { |
| 817 | $this->assertRoleAllowsWrites(); |
| 818 | |
| 819 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 820 | } |
| 821 | |
| 822 | public function streamStatementEnd( &$sql, &$newLine ) { |
| 823 | return $this->__call( __FUNCTION__, [ &$sql, &$newLine ] ); |
| 824 | } |
| 825 | |
| 826 | public function duplicateTableStructure( |
| 827 | $oldName, $newName, $temporary = false, $fname = __METHOD__ |
| 828 | ) { |
| 829 | $this->assertRoleAllowsWrites(); |
| 830 | |
| 831 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 832 | } |
| 833 | |
| 834 | public function indexUnique( $table, $index, $fname = __METHOD__ ) { |
| 835 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 836 | } |
| 837 | |
| 838 | public function listTables( $prefix = null, $fname = __METHOD__ ) { |
| 839 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 840 | } |
| 841 | |
| 842 | public function fieldInfo( $table, $field ) { |
| 843 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 844 | } |
| 845 | |
| 846 | public function __toString() { |
| 847 | if ( $this->conn === null ) { |
| 848 | return $this->getType() . ' object #' . spl_object_id( $this ); |
| 849 | } |
| 850 | |
| 851 | return $this->__call( __FUNCTION__, func_get_args() ); |
| 852 | } |
| 853 | |
| 854 | /** |
| 855 | * Error out if the role is not DB_PRIMARY |
| 856 | * |
| 857 | * Note that the underlying connection may or may not itself be read-only. |
| 858 | * It could even be to a writable primary (both server-side and to the application). |
| 859 | * This error is meant for the case when a DB_REPLICA handle was requested but a |
| 860 | * a write was attempted on that handle regardless. |
| 861 | * |
| 862 | * In configurations where the primary DB has some generic read load or is the only server, |
| 863 | * DB_PRIMARY/DB_REPLICA will sometimes (or always) use the same connection to the primary DB. |
| 864 | * This does not effect the role of DBConnRef instances. |
| 865 | * @throws DBReadOnlyRoleError |
| 866 | */ |
| 867 | protected function assertRoleAllowsWrites() { |
| 868 | // DB_PRIMARY is "prima facie" writable |
| 869 | if ( $this->role !== ILoadBalancer::DB_PRIMARY ) { |
| 870 | throw new DBReadOnlyRoleError( $this->conn, "Cannot write with role DB_REPLICA" ); |
| 871 | } |
| 872 | } |
| 873 | |
| 874 | /** |
| 875 | * @return DBUnexpectedError |
| 876 | */ |
| 877 | protected function getDomainChangeException() { |
| 878 | return new DBUnexpectedError( |
| 879 | $this, |
| 880 | "Cannot directly change the selected DB domain; any underlying connection handle " . |
| 881 | "is owned by a LoadBalancer instance and possibly shared with other callers. " . |
| 882 | "LoadBalancer automatically manages DB domain re-selection of unused handles." |
| 883 | ); |
| 884 | } |
| 885 | |
| 886 | /** |
| 887 | * @param int $i Specific or virtual (DB_PRIMARY/DB_REPLICA) server index |
| 888 | * @return int|mixed |
| 889 | */ |
| 890 | protected function normalizeServerIndex( $i ) { |
| 891 | return ( $i === ILoadBalancer::DB_PRIMARY ) ? ServerInfo::WRITER_INDEX : $i; |
| 892 | } |
| 893 | } |