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<?php |
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namespace App\Component\Db; |
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use \PDO; |
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use App\Component\Config; |
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use App\Component\Container; |
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use Exception; |
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class Factory |
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{ |
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const _ADAPTER = 'adapter'; |
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private $container; |
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/** |
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* factory config |
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* |
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* @var array |
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*/ |
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private $config; |
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/** |
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* connection pool |
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* |
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* @var array |
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*/ |
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private $connectionPool; |
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/** |
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* instanciate factory |
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* |
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* @param Container $container |
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*/ |
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public function __construct(Container $container) |
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{ |
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$this->container = $container; |
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$configService = $this->container->getService(\App\Config::class); |
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$this->config = $configService->getSettings(Config::_DB); |
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} |
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/** |
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* return Pdo connection instance from pool |
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* |
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* @param string $slot |
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* @param string $dbname |
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* @return PDO |
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*/ |
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public function getConnection(string $slot, string $dbname): PDO |
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{ |
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$id = $this->identity($slot, $dbname); |
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if (isset($this->connectionPool[$id])) { |
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return $this->connectionPool[$id]; |
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} |
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$this->connect($slot, $dbname); |
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return $this->connectionPool[$id]; |
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} |
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/** |
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* connect |
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* |
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* @param string $slot |
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* @param string $dbname |
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* @return void |
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*/ |
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protected function connect(string $slot, string $dbname): Factory |
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{ |
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$this->connectionPool = (is_null($this->connectionPool)) |
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? [] |
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: $this->connectionPool; |
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$params = $this->adapterParams($slot, $dbname); |
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try { |
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$adapter = new $params[self::_ADAPTER]($dbname, $params); |
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$adapter->connect(); |
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$id = $this->identity($slot, $dbname); |
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$this->connectionPool[$id] = $adapter->getConnection(); |
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} catch (\Exception $e) { |
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throw new Exception($e); |
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} |
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return $this; |
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} |
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/** |
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* adapter params |
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* |
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* @param string $slot |
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* @param string $dbname |
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* @return array |
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*/ |
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protected function adapterParams(string $slot, string $dbname) |
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{ |
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if (false === isset($this->config[$slot][$dbname])) { |
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$exMsg = sprintf( |
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'Missing or invalid config on slot %s for db %s', |
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$slot, |
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$dbname |
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); |
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throw new \Exception($exMsg); |
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} |
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return $this->config[$slot][$dbname]; |
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} |
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/** |
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* identify pool index |
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* |
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* @param string $slot |
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* @param string $dbname |
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* @return string |
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*/ |
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protected function identity(string $slot, string $dbname): string |
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{ |
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return sprintf('%s-%s', $slot, $dbname); |
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} |
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} |
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pierre-fromager /
nymfonya
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