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<?php |
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namespace Bernard\Driver; |
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use Doctrine\DBAL\Connection; |
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use Doctrine\DBAL\Exception\ConstraintViolationException; |
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/** |
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* Driver supporting Doctrine DBAL |
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* |
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* @package Bernard |
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*/ |
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class DoctrineDriver implements \Bernard\Driver |
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{ |
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protected $connection; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function __construct(Connection $connection) |
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{ |
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$this->connection = $connection; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function listQueues() |
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{ |
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$statement = $this->connection->prepare('SELECT name FROM bernard_queues'); |
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$statement->execute(); |
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return $statement->fetchAll(\PDO::FETCH_COLUMN); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function createQueue($queueName) |
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{ |
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try { |
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$this->connection->transactional(function () use ($queueName) { |
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$queueExistsQb = $this->connection->createQueryBuilder(); |
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$queueExists = $queueExistsQb |
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->select('name') |
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->from('bernard_queues', 'bq') |
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->where($queueExistsQb->expr()->eq('bq.name', ':name')) |
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->setParameter('name', $queueName) |
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->execute(); |
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if ($queueExists->fetch()) { |
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// queue was already created |
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return; |
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} |
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$this->connection->insert('bernard_queues', array('name' => $queueName)); |
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}); |
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} catch (ConstraintViolationException $ignored) { |
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// Because SQL server does not support a portable INSERT ON IGNORE syntax |
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// this ignores error based on primary key. |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function countMessages($queueName) |
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{ |
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$query = 'SELECT COUNT(id) FROM bernard_messages WHERE queue = :queue AND visible = :visible'; |
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return (integer) $this->connection->fetchColumn($query, [ |
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'queue' => $queueName, |
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'visible' => true, |
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]); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function pushMessage($queueName, $message) |
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{ |
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$types = ['string', 'string', 'datetime']; |
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$data = [ |
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'queue' => $queueName, |
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'message' => $message, |
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'sentAt' => new \DateTime(), |
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]; |
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$this->createQueue($queueName); |
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$this->connection->insert('bernard_messages', $data, $types); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function popMessage($queueName, $duration = 5) |
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{ |
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$runtime = microtime(true) + $duration; |
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while (microtime(true) < $runtime) { |
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$this->connection->beginTransaction(); |
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try { |
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$message = $this->doPopMessage($queueName); |
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$this->connection->commit(); |
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} catch (\Exception $e) { |
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$this->connection->rollback(); |
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} |
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if (isset($message)) { |
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return $message; |
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} |
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//sleep for 10 ms |
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usleep(10000); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function acknowledgeMessage($queueName, $receipt) |
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{ |
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$this->connection->delete('bernard_messages', ['id' => $receipt, 'queue' => $queueName]); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function peekQueue($queueName, $index = 0, $limit = 20) |
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{ |
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$parameters = [$queueName, $limit, $index]; |
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$types = ['string', 'integer', 'integer']; |
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$query = 'SELECT message FROM bernard_messages WHERE queue = ? ORDER BY sentAt LIMIT ? OFFSET ?'; |
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return $this |
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->connection |
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->executeQuery($query, $parameters, $types) |
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->fetchAll(\PDO::FETCH_COLUMN) |
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; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function removeQueue($queueName) |
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{ |
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$this->connection->delete('bernard_messages', ['queue' => $queueName]); |
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$this->connection->delete('bernard_queues', ['name' => $queueName]); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function info() |
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{ |
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$params = $this->connection->getParams(); |
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unset($params['user'], $params['password']); |
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return $params; |
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} |
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/** |
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* Execute the actual query and process the response |
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* |
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* @param string $queueName |
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* |
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* @return array|null |
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*/ |
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protected function doPopMessage($queueName) |
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{ |
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$query = 'SELECT id, message FROM bernard_messages |
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WHERE queue = :queue AND visible = :visible |
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ORDER BY sentAt LIMIT 1 ' . $this->connection->getDatabasePlatform()->getForUpdateSql(); |
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list($id, $message) = $this->connection->fetchArray($query, [ |
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'queue' => $queueName, |
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'visible' => true, |
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]); |
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if ($id) { |
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$this->connection->update('bernard_messages', ['visible' => 0], compact('id')); |
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return [$message, $id]; |
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} |
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} |
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} |
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bernardphp /
bernard
