1 files changed, 524 insertions, 0 deletions
diff --git a/includes/db/DBConnRef.php b/includes/db/DBConnRef.php
new file mode 100644
index 00000000..b4f3f792
--- /dev/null
+++ b/includes/db/DBConnRef.php
@@ -0,0 +1,524 @@
+<?php
+/**
+ * Helper class to handle automatically marking connections as reusable (via RAII pattern)
+ * as well handling deferring the actual network connection until the handle is used
+ *
+ * @note: proxy methods are defined explicity to avoid interface errors
+ * @ingroup Database
+ * @since 1.22
+ */
+class DBConnRef implements IDatabase {
+	/** @var LoadBalancer */
+	private $lb;
+
+	/** @var DatabaseBase|null */
+	private $conn;
+
+	/** @var array|null */
+	private $params;
+
+	/**
+	 * @param LoadBalancer $lb
+	 * @param DatabaseBase|array $conn Connection or (server index, group, wiki ID) array
+	 */
+	public function __construct( LoadBalancer $lb, $conn ) {
+		$this->lb = $lb;
+		if ( $conn instanceof DatabaseBase ) {
+			$this->conn = $conn;
+		} else {
+			$this->params = $conn;
+		}
+	}
+
+	function __call( $name, array $arguments ) {
+		if ( $this->conn === null ) {
+			list( $db, $groups, $wiki ) = $this->params;
+			$this->conn = $this->lb->getConnection( $db, $groups, $wiki );
+		}
+
+		return call_user_func_array( array( $this->conn, $name ), $arguments );
+	}
+
+	public function getServerInfo() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function bufferResults( $buffer = null ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function trxLevel() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function trxTimestamp() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function tablePrefix( $prefix = null ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function dbSchema( $schema = null ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getLBInfo( $name = null ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function setLBInfo( $name, $value = null ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function implicitGroupby() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function implicitOrderby() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function lastQuery() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function doneWrites() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function lastDoneWrites() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function writesOrCallbacksPending() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function pendingWriteQueryDuration() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function isOpen() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function setFlag( $flag ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function clearFlag( $flag ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getFlag( $flag ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getProperty( $name ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getWikiID() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getType() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function open( $server, $user, $password, $dbName ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function fetchObject( $res ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function fetchRow( $res ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function numRows( $res ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function numFields( $res ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function fieldName( $res, $n ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function insertId() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function dataSeek( $res, $row ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function lastErrno() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function lastError() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function fieldInfo( $table, $field ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function affectedRows() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getSoftwareLink() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getServerVersion() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function close() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function reportConnectionError( $error = 'Unknown error' ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function query( $sql, $fname = __METHOD__, $tempIgnore = false ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function freeResult( $res ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function selectField(
+		$table, $var, $cond = '', $fname = __METHOD__, $options = array()
+	) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function selectFieldValues(
+		$table, $var, $cond = '', $fname = __METHOD__, $options = array()
+	) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function select(
+		$table, $vars, $conds = '', $fname = __METHOD__,
+		$options = array(), $join_conds = array()
+	) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function selectSQLText(
+		$table, $vars, $conds = '', $fname = __METHOD__,
+		$options = array(), $join_conds = array()
+	) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function selectRow(
+		$table, $vars, $conds, $fname = __METHOD__,
+		$options = array(), $join_conds = array()
+	) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function estimateRowCount(
+		$table, $vars = '*', $conds = '', $fname = __METHOD__, $options = array()
+	) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function selectRowCount(
+		$table, $vars = '*', $conds = '', $fname = __METHOD__, $options = array()
+	) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function fieldExists( $table, $field, $fname = __METHOD__ ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function indexExists( $table, $index, $fname = __METHOD__ ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function tableExists( $table, $fname = __METHOD__ ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function indexUnique( $table, $index ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function insert( $table, $a, $fname = __METHOD__, $options = array() ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function update( $table, $values, $conds, $fname = __METHOD__, $options = array() ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function makeList( $a, $mode = LIST_COMMA ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function makeWhereFrom2d( $data, $baseKey, $subKey ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function bitNot( $field ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function bitAnd( $fieldLeft, $fieldRight ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function bitOr( $fieldLeft, $fieldRight ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function buildConcat( $stringList ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function buildGroupConcatField(
+		$delim, $table, $field, $conds = '', $join_conds = array()
+	) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function selectDB( $db ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getDBname() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getServer() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function addQuotes( $s ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function buildLike() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function anyChar() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function anyString() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function nextSequenceValue( $seqName ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function replace( $table, $uniqueIndexes, $rows, $fname = __METHOD__ ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function upsert(
+		$table, array $rows, array $uniqueIndexes, array $set, $fname = __METHOD__
+	) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function deleteJoin(
+		$delTable, $joinTable, $delVar, $joinVar, $conds, $fname = __METHOD__
+	) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function delete( $table, $conds, $fname = __METHOD__ ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function insertSelect(
+		$destTable, $srcTable, $varMap, $conds,
+		$fname = __METHOD__, $insertOptions = array(), $selectOptions = array()
+	) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function unionSupportsOrderAndLimit() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function unionQueries( $sqls, $all ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function conditional( $cond, $trueVal, $falseVal ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function strreplace( $orig, $old, $new ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getServerUptime() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function wasDeadlock() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function wasLockTimeout() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function wasErrorReissuable() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function wasReadOnlyError() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function masterPosWait( DBMasterPos $pos, $timeout ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getSlavePos() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getMasterPos() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function onTransactionIdle( $callback ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function onTransactionPreCommitOrIdle( $callback ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function startAtomic( $fname = __METHOD__ ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function endAtomic( $fname = __METHOD__ ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function begin( $fname = __METHOD__ ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function commit( $fname = __METHOD__, $flush = '' ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function rollback( $fname = __METHOD__, $flush = '' ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function listTables( $prefix = null, $fname = __METHOD__ ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function timestamp( $ts = 0 ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function timestampOrNull( $ts = null ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function resultObject( $result ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function ping() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getLag() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function maxListLen() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function encodeBlob( $b ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function decodeBlob( $b ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function setSessionOptions( array $options ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function setSchemaVars( $vars ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function lockIsFree( $lockName, $method ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function lock( $lockName, $method, $timeout = 5 ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function unlock( $lockName, $method ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function namedLocksEnqueue() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function getInfinity() {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function encodeExpiry( $expiry ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function decodeExpiry( $expiry, $format = TS_MW ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	public function setBigSelects( $value = true ) {
+		return $this->__call( __FUNCTION__, func_get_args() );
+	}
+
+	/**
+	 * Clean up the connection when out of scope
+	 */
+	function __destruct() {
+		if ( $this->conn !== null ) {
+			$this->lb->reuseConnection( $this->conn );
+		}
+	}
+}