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<?php |
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namespace Wikibase\Database\MediaWiki; |
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use DatabaseBase; |
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/** |
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* Lazy database connection provider. |
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* The connection is fetched when needed using the id provided in the constructor. |
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* |
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* TODO: implement connection handling requirements |
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* |
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* @since 0.1 |
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* |
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* @licence GNU GPL v2+ |
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* @author Jeroen De Dauw < [email protected] > |
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*/ |
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class LazyDBConnectionProvider implements DBConnectionProvider { |
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/** |
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* @var int |
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*/ |
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private $connectionId; |
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/** |
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* Query group(s), or false for the generic reader |
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* |
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* @var array|string|bool |
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*/ |
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private $groups; |
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/** |
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* Wiki ID, or false for the current wiki |
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* |
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* @var string|bool |
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*/ |
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private $wiki; |
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/** |
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* @var DatabaseBase|null |
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*/ |
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private $connection = null; |
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/** |
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* @since 0.1 |
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* |
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* @param int $connectionId |
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* @param array|string|bool $groups Query group(s), or false for the generic reader |
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* @param string|bool $wiki Wiki ID, or false for the current wiki |
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*/ |
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public function __construct( $connectionId, $groups = array(), $wiki = false ) { |
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$this->connectionId = $connectionId; |
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$this->groups = $groups; |
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$this->wiki = $wiki; |
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} |
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/** |
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* @see DBConnectionProvider::getConnection |
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* |
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* @since 0.1 |
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* |
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* @return DatabaseBase |
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*/ |
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public function getConnection() { |
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if ( $this->connection === null ) { |
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$this->connection = wfGetLB( $this->wiki )->getConnection( $this->connectionId, $this->groups, $this->wiki ); |
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} |
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assert( $this->connection instanceof DatabaseBase ); |
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return $this->connection; |
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} |
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/** |
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* @see DBConnectionProvider::releaseConnection |
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* |
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* @since 0.1 |
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*/ |
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public function releaseConnection() { |
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if ( $this->wiki !== false && $this->connection !== null ) { |
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wfGetLB( $this->wiki )->reuseConnection( $this->connection ); |
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} |
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} |
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} |
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wmde /
WikibaseDatabase
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