includes/libs/rdbms/database/DBConnRef.php

   1 <?php
   2 /**
   3  * Helper class to handle automatically marking connections as reusable (via RAII pattern)
   4  * as well handling deferring the actual network connection until the handle is used
   5  *
   6  * @note: proxy methods are defined explicity to avoid interface errors
   7  * @ingroup Database
   8  * @since 1.22
   9  */
  10 class DBConnRef implements IDatabase {
  11         /** @var ILoadBalancer */
  12         private $lb;
  13
  14         /** @var IDatabase|null Live connection handle */
  15         private $conn;
  16
  17         /** @var array|null N-tuple of (server index, group, DatabaseDomain|string) */
  18         private $params;
  19
  20         const FLD_INDEX = 0;
  21         const FLD_GROUP = 1;
  22         const FLD_DOMAIN = 2;
  23
  24         /**
  25          * @param ILoadBalancer $lb
  26          * @param IDatabase|array $conn Connection or (server index, group, DatabaseDomain|string)
  27          */
  28         public function __construct( ILoadBalancer $lb, $conn ) {
  29                 $this->lb = $lb;
  30                 if ( $conn instanceof IDatabase ) {
  31                         $this->conn = $conn; // live handle
  32                 } elseif ( count( $conn ) >= 3 && $conn[self::FLD_DOMAIN] !== false ) {
  33                         $this->params = $conn;
  34                 } else {
  35                         throw new InvalidArgumentException( "Missing lazy connection arguments." );
  36                 }
  37         }
  38
  39         function __call( $name, array $arguments ) {
  40                 if ( $this->conn === null ) {
  41                         list( $db, $groups, $wiki ) = $this->params;
  42                         $this->conn = $this->lb->getConnection( $db, $groups, $wiki );
  43                 }
  44
  45                 return call_user_func_array( [ $this->conn, $name ], $arguments );
  46         }
  47
  48         public function getServerInfo() {
  49                 return $this->__call( __FUNCTION__, func_get_args() );
  50         }
  51
  52         public function bufferResults( $buffer = null ) {
  53                 return $this->__call( __FUNCTION__, func_get_args() );
  54         }
  55
  56         public function trxLevel() {
  57                 return $this->__call( __FUNCTION__, func_get_args() );
  58         }
  59
  60         public function trxTimestamp() {
  61                 return $this->__call( __FUNCTION__, func_get_args() );
  62         }
  63
  64         public function explicitTrxActive() {
  65                 return $this->__call( __FUNCTION__, func_get_args() );
  66         }
  67
  68         public function tablePrefix( $prefix = null ) {
  69                 return $this->__call( __FUNCTION__, func_get_args() );
  70         }
  71
  72         public function dbSchema( $schema = null ) {
  73                 return $this->__call( __FUNCTION__, func_get_args() );
  74         }
  75
  76         public function getLBInfo( $name = null ) {
  77                 return $this->__call( __FUNCTION__, func_get_args() );
  78         }
  79
  80         public function setLBInfo( $name, $value = null ) {
  81                 return $this->__call( __FUNCTION__, func_get_args() );
  82         }
  83
  84         public function setLazyMasterHandle( IDatabase $conn ) {
  85                 return $this->__call( __FUNCTION__, func_get_args() );
  86         }
  87
  88         public function implicitGroupby() {
  89                 return $this->__call( __FUNCTION__, func_get_args() );
  90         }
  91
  92         public function implicitOrderby() {
  93                 return $this->__call( __FUNCTION__, func_get_args() );
  94         }
  95
  96         public function lastQuery() {
  97                 return $this->__call( __FUNCTION__, func_get_args() );
  98         }
  99
 100         public function doneWrites() {
 101                 return $this->__call( __FUNCTION__, func_get_args() );
 102         }
 103
 104         public function lastDoneWrites() {
 105                 return $this->__call( __FUNCTION__, func_get_args() );
 106         }
 107
 108         public function writesPending() {
 109                 return $this->__call( __FUNCTION__, func_get_args() );
 110         }
 111
 112         public function writesOrCallbacksPending() {
 113                 return $this->__call( __FUNCTION__, func_get_args() );
 114         }
 115
 116         public function pendingWriteQueryDuration( $type = self::ESTIMATE_TOTAL ) {
 117                 return $this->__call( __FUNCTION__, func_get_args() );
 118         }
 119
 120         public function pendingWriteCallers() {
 121                 return $this->__call( __FUNCTION__, func_get_args() );
 122         }
 123
 124         public function isOpen() {
 125                 return $this->__call( __FUNCTION__, func_get_args() );
 126         }
 127
 128         public function setFlag( $flag, $remember = self::REMEMBER_NOTHING ) {
 129                 return $this->__call( __FUNCTION__, func_get_args() );
 130         }
 131
 132         public function clearFlag( $flag, $remember = self::REMEMBER_NOTHING ) {
 133                 return $this->__call( __FUNCTION__, func_get_args() );
 134         }
 135
 136         public function restoreFlags( $state = self::RESTORE_PRIOR ) {
 137                 return $this->__call( __FUNCTION__, func_get_args() );
 138         }
 139
 140         public function getFlag( $flag ) {
 141                 return $this->__call( __FUNCTION__, func_get_args() );
 142         }
 143
 144         public function getProperty( $name ) {
 145                 return $this->__call( __FUNCTION__, func_get_args() );
 146         }
 147
 148         public function getDomainID() {
 149                 if ( $this->conn === null ) {
 150                         $domain = $this->params[self::FLD_DOMAIN];
 151                         // Avoid triggering a database connection
 152                         return $domain instanceof DatabaseDomain ? $domain->getId() : $domain;
 153                 }
 154
 155                 return $this->__call( __FUNCTION__, func_get_args() );
 156         }
 157
 158         public function getWikiID() {
 159                 return $this->getDomainID();
 160         }
 161
 162         public function getType() {
 163                 return $this->__call( __FUNCTION__, func_get_args() );
 164         }
 165
 166         public function open( $server, $user, $password, $dbName ) {
 167                 return $this->__call( __FUNCTION__, func_get_args() );
 168         }
 169
 170         public function fetchObject( $res ) {
 171                 return $this->__call( __FUNCTION__, func_get_args() );
 172         }
 173
 174         public function fetchRow( $res ) {
 175                 return $this->__call( __FUNCTION__, func_get_args() );
 176         }
 177
 178         public function numRows( $res ) {
 179                 return $this->__call( __FUNCTION__, func_get_args() );
 180         }
 181
 182         public function numFields( $res ) {
 183                 return $this->__call( __FUNCTION__, func_get_args() );
 184         }
 185
 186         public function fieldName( $res, $n ) {
 187                 return $this->__call( __FUNCTION__, func_get_args() );
 188         }
 189
 190         public function insertId() {
 191                 return $this->__call( __FUNCTION__, func_get_args() );
 192         }
 193
 194         public function dataSeek( $res, $row ) {
 195                 return $this->__call( __FUNCTION__, func_get_args() );
 196         }
 197
 198         public function lastErrno() {
 199                 return $this->__call( __FUNCTION__, func_get_args() );
 200         }
 201
 202         public function lastError() {
 203                 return $this->__call( __FUNCTION__, func_get_args() );
 204         }
 205
 206         public function fieldInfo( $table, $field ) {
 207                 return $this->__call( __FUNCTION__, func_get_args() );
 208         }
 209
 210         public function affectedRows() {
 211                 return $this->__call( __FUNCTION__, func_get_args() );
 212         }
 213
 214         public function getSoftwareLink() {
 215                 return $this->__call( __FUNCTION__, func_get_args() );
 216         }
 217
 218         public function getServerVersion() {
 219                 return $this->__call( __FUNCTION__, func_get_args() );
 220         }
 221
 222         public function close() {
 223                 return $this->__call( __FUNCTION__, func_get_args() );
 224         }
 225
 226         public function reportConnectionError( $error = 'Unknown error' ) {
 227                 return $this->__call( __FUNCTION__, func_get_args() );
 228         }
 229
 230         public function query( $sql, $fname = __METHOD__, $tempIgnore = false ) {
 231                 return $this->__call( __FUNCTION__, func_get_args() );
 232         }
 233
 234         public function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
 235                 return $this->__call( __FUNCTION__, func_get_args() );
 236         }
 237
 238         public function freeResult( $res ) {
 239                 return $this->__call( __FUNCTION__, func_get_args() );
 240         }
 241
 242         public function selectField(
 243                 $table, $var, $cond = '', $fname = __METHOD__, $options = []
 244         ) {
 245                 return $this->__call( __FUNCTION__, func_get_args() );
 246         }
 247
 248         public function selectFieldValues(
 249                 $table, $var, $cond = '', $fname = __METHOD__, $options = []
 250         ) {
 251                 return $this->__call( __FUNCTION__, func_get_args() );
 252         }
 253
 254         public function select(
 255                 $table, $vars, $conds = '', $fname = __METHOD__,
 256                 $options = [], $join_conds = []
 257         ) {
 258                 return $this->__call( __FUNCTION__, func_get_args() );
 259         }
 260
 261         public function selectSQLText(
 262                 $table, $vars, $conds = '', $fname = __METHOD__,
 263                 $options = [], $join_conds = []
 264         ) {
 265                 return $this->__call( __FUNCTION__, func_get_args() );
 266         }
 267
 268         public function selectRow(
 269                 $table, $vars, $conds, $fname = __METHOD__,
 270                 $options = [], $join_conds = []
 271         ) {
 272                 return $this->__call( __FUNCTION__, func_get_args() );
 273         }
 274
 275         public function estimateRowCount(
 276                 $table, $vars = '*', $conds = '', $fname = __METHOD__, $options = []
 277         ) {
 278                 return $this->__call( __FUNCTION__, func_get_args() );
 279         }
 280
 281         public function selectRowCount(
 282                 $tables, $vars = '*', $conds = '', $fname = __METHOD__, $options = [], $join_conds = []
 283         ) {
 284                 return $this->__call( __FUNCTION__, func_get_args() );
 285         }
 286
 287         public function fieldExists( $table, $field, $fname = __METHOD__ ) {
 288                 return $this->__call( __FUNCTION__, func_get_args() );
 289         }
 290
 291         public function indexExists( $table, $index, $fname = __METHOD__ ) {
 292                 return $this->__call( __FUNCTION__, func_get_args() );
 293         }
 294
 295         public function tableExists( $table, $fname = __METHOD__ ) {
 296                 return $this->__call( __FUNCTION__, func_get_args() );
 297         }
 298
 299         public function indexUnique( $table, $index ) {
 300                 return $this->__call( __FUNCTION__, func_get_args() );
 301         }
 302
 303         public function insert( $table, $a, $fname = __METHOD__, $options = [] ) {
 304                 return $this->__call( __FUNCTION__, func_get_args() );
 305         }
 306
 307         public function update( $table, $values, $conds, $fname = __METHOD__, $options = [] ) {
 308                 return $this->__call( __FUNCTION__, func_get_args() );
 309         }
 310
 311         public function makeList( $a, $mode = self::LIST_COMMA ) {
 312                 return $this->__call( __FUNCTION__, func_get_args() );
 313         }
 314
 315         public function makeWhereFrom2d( $data, $baseKey, $subKey ) {
 316                 return $this->__call( __FUNCTION__, func_get_args() );
 317         }
 318
 319         public function aggregateValue( $valuedata, $valuename = 'value' ) {
 320                 return $this->__call( __FUNCTION__, func_get_args() );
 321         }
 322
 323         public function bitNot( $field ) {
 324                 return $this->__call( __FUNCTION__, func_get_args() );
 325         }
 326
 327         public function bitAnd( $fieldLeft, $fieldRight ) {
 328                 return $this->__call( __FUNCTION__, func_get_args() );
 329         }
 330
 331         public function bitOr( $fieldLeft, $fieldRight ) {
 332                 return $this->__call( __FUNCTION__, func_get_args() );
 333         }
 334
 335         public function buildConcat( $stringList ) {
 336                 return $this->__call( __FUNCTION__, func_get_args() );
 337         }
 338
 339         public function buildGroupConcatField(
 340                 $delim, $table, $field, $conds = '', $join_conds = []
 341         ) {
 342                 return $this->__call( __FUNCTION__, func_get_args() );
 343         }
 344
 345         public function buildStringCast( $field ) {
 346                 return $this->__call( __FUNCTION__, func_get_args() );
 347         }
 348
 349         public function selectDB( $db ) {
 350                 return $this->__call( __FUNCTION__, func_get_args() );
 351         }
 352
 353         public function getDBname() {
 354                 return $this->__call( __FUNCTION__, func_get_args() );
 355         }
 356
 357         public function getServer() {
 358                 return $this->__call( __FUNCTION__, func_get_args() );
 359         }
 360
 361         public function addQuotes( $s ) {
 362                 return $this->__call( __FUNCTION__, func_get_args() );
 363         }
 364
 365         public function buildLike() {
 366                 return $this->__call( __FUNCTION__, func_get_args() );
 367         }
 368
 369         public function anyChar() {
 370                 return $this->__call( __FUNCTION__, func_get_args() );
 371         }
 372
 373         public function anyString() {
 374                 return $this->__call( __FUNCTION__, func_get_args() );
 375         }
 376
 377         public function nextSequenceValue( $seqName ) {
 378                 return $this->__call( __FUNCTION__, func_get_args() );
 379         }
 380
 381         public function replace( $table, $uniqueIndexes, $rows, $fname = __METHOD__ ) {
 382                 return $this->__call( __FUNCTION__, func_get_args() );
 383         }
 384
 385         public function upsert(
 386                 $table, array $rows, array $uniqueIndexes, array $set, $fname = __METHOD__
 387         ) {
 388                 return $this->__call( __FUNCTION__, func_get_args() );
 389         }
 390
 391         public function deleteJoin(
 392                 $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = __METHOD__
 393         ) {
 394                 return $this->__call( __FUNCTION__, func_get_args() );
 395         }
 396
 397         public function delete( $table, $conds, $fname = __METHOD__ ) {
 398                 return $this->__call( __FUNCTION__, func_get_args() );
 399         }
 400
 401         public function insertSelect(
 402                 $destTable, $srcTable, $varMap, $conds,
 403                 $fname = __METHOD__, $insertOptions = [], $selectOptions = []
 404         ) {
 405                 return $this->__call( __FUNCTION__, func_get_args() );
 406         }
 407
 408         public function unionSupportsOrderAndLimit() {
 409                 return $this->__call( __FUNCTION__, func_get_args() );
 410         }
 411
 412         public function unionQueries( $sqls, $all ) {
 413                 return $this->__call( __FUNCTION__, func_get_args() );
 414         }
 415
 416         public function conditional( $cond, $trueVal, $falseVal ) {
 417                 return $this->__call( __FUNCTION__, func_get_args() );
 418         }
 419
 420         public function strreplace( $orig, $old, $new ) {
 421                 return $this->__call( __FUNCTION__, func_get_args() );
 422         }
 423
 424         public function getServerUptime() {
 425                 return $this->__call( __FUNCTION__, func_get_args() );
 426         }
 427
 428         public function wasDeadlock() {
 429                 return $this->__call( __FUNCTION__, func_get_args() );
 430         }
 431
 432         public function wasLockTimeout() {
 433                 return $this->__call( __FUNCTION__, func_get_args() );
 434         }
 435
 436         public function wasErrorReissuable() {
 437                 return $this->__call( __FUNCTION__, func_get_args() );
 438         }
 439
 440         public function wasReadOnlyError() {
 441                 return $this->__call( __FUNCTION__, func_get_args() );
 442         }
 443
 444         public function masterPosWait( DBMasterPos $pos, $timeout ) {
 445                 return $this->__call( __FUNCTION__, func_get_args() );
 446         }
 447
 448         public function getReplicaPos() {
 449                 return $this->__call( __FUNCTION__, func_get_args() );
 450         }
 451
 452         public function getMasterPos() {
 453                 return $this->__call( __FUNCTION__, func_get_args() );
 454         }
 455
 456         public function serverIsReadOnly() {
 457                 return $this->__call( __FUNCTION__, func_get_args() );
 458         }
 459
 460         public function onTransactionResolution( callable $callback, $fname = __METHOD__ ) {
 461                 return $this->__call( __FUNCTION__, func_get_args() );
 462         }
 463
 464         public function onTransactionIdle( callable $callback, $fname = __METHOD__ ) {
 465                 return $this->__call( __FUNCTION__, func_get_args() );
 466         }
 467
 468         public function onTransactionPreCommitOrIdle( callable $callback, $fname = __METHOD__ ) {
 469                 return $this->__call( __FUNCTION__, func_get_args() );
 470         }
 471
 472         public function setTransactionListener( $name, callable $callback = null ) {
 473                 return $this->__call( __FUNCTION__, func_get_args() );
 474         }
 475
 476         public function startAtomic( $fname = __METHOD__ ) {
 477                 return $this->__call( __FUNCTION__, func_get_args() );
 478         }
 479
 480         public function endAtomic( $fname = __METHOD__ ) {
 481                 return $this->__call( __FUNCTION__, func_get_args() );
 482         }
 483
 484         public function doAtomicSection( $fname, callable $callback ) {
 485                 return $this->__call( __FUNCTION__, func_get_args() );
 486         }
 487
 488         public function begin( $fname = __METHOD__, $mode = IDatabase::TRANSACTION_EXPLICIT ) {
 489                 return $this->__call( __FUNCTION__, func_get_args() );
 490         }
 491
 492         public function commit( $fname = __METHOD__, $flush = '' ) {
 493                 return $this->__call( __FUNCTION__, func_get_args() );
 494         }
 495
 496         public function rollback( $fname = __METHOD__, $flush = '' ) {
 497                 return $this->__call( __FUNCTION__, func_get_args() );
 498         }
 499
 500         public function flushSnapshot( $fname = __METHOD__ ) {
 501                 return $this->__call( __FUNCTION__, func_get_args() );
 502         }
 503
 504         public function listTables( $prefix = null, $fname = __METHOD__ ) {
 505                 return $this->__call( __FUNCTION__, func_get_args() );
 506         }
 507
 508         public function timestamp( $ts = 0 ) {
 509                 return $this->__call( __FUNCTION__, func_get_args() );
 510         }
 511
 512         public function timestampOrNull( $ts = null ) {
 513                 return $this->__call( __FUNCTION__, func_get_args() );
 514         }
 515
 516         public function ping( &$rtt = null ) {
 517                 return func_num_args()
 518                         ? $this->__call( __FUNCTION__, [ &$rtt ] )
 519                         : $this->__call( __FUNCTION__, [] ); // method cares about null vs missing
 520         }
 521
 522         public function getLag() {
 523                 return $this->__call( __FUNCTION__, func_get_args() );
 524         }
 525
 526         public function getSessionLagStatus() {
 527                 return $this->__call( __FUNCTION__, func_get_args() );
 528         }
 529
 530         public function maxListLen() {
 531                 return $this->__call( __FUNCTION__, func_get_args() );
 532         }
 533
 534         public function encodeBlob( $b ) {
 535                 return $this->__call( __FUNCTION__, func_get_args() );
 536         }
 537
 538         public function decodeBlob( $b ) {
 539                 return $this->__call( __FUNCTION__, func_get_args() );
 540         }
 541
 542         public function setSessionOptions( array $options ) {
 543                 return $this->__call( __FUNCTION__, func_get_args() );
 544         }
 545
 546         public function setSchemaVars( $vars ) {
 547                 return $this->__call( __FUNCTION__, func_get_args() );
 548         }
 549
 550         public function lockIsFree( $lockName, $method ) {
 551                 return $this->__call( __FUNCTION__, func_get_args() );
 552         }
 553
 554         public function lock( $lockName, $method, $timeout = 5 ) {
 555                 return $this->__call( __FUNCTION__, func_get_args() );
 556         }
 557
 558         public function unlock( $lockName, $method ) {
 559                 return $this->__call( __FUNCTION__, func_get_args() );
 560         }
 561
 562         public function getScopedLockAndFlush( $lockKey, $fname, $timeout ) {
 563                 return $this->__call( __FUNCTION__, func_get_args() );
 564         }
 565
 566         public function namedLocksEnqueue() {
 567                 return $this->__call( __FUNCTION__, func_get_args() );
 568         }
 569
 570         public function getInfinity() {
 571                 return $this->__call( __FUNCTION__, func_get_args() );
 572         }
 573
 574         public function encodeExpiry( $expiry ) {
 575                 return $this->__call( __FUNCTION__, func_get_args() );
 576         }
 577
 578         public function decodeExpiry( $expiry, $format = TS_MW ) {
 579                 return $this->__call( __FUNCTION__, func_get_args() );
 580         }
 581
 582         public function setBigSelects( $value = true ) {
 583                 return $this->__call( __FUNCTION__, func_get_args() );
 584         }
 585
 586         public function isReadOnly() {
 587                 return $this->__call( __FUNCTION__, func_get_args() );
 588         }
 589
 590         public function setTableAliases( array $aliases ) {
 591                 return $this->__call( __FUNCTION__, func_get_args() );
 592         }
 593
 594         /**
 595          * Clean up the connection when out of scope
 596          */
 597         function __destruct() {
 598                 if ( $this->conn !== null ) {
 599                         $this->lb->reuseConnection( $this->conn );
 600                 }
 601         }
 602 }