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<?php declare(strict_types=1); |
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namespace EdmondsCommerce\DoctrineStaticMeta\EntityManager\RetryConnection; |
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use Doctrine\Common\EventManager; |
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use Doctrine\DBAL\Cache\QueryCacheProfile; |
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use Doctrine\DBAL\Configuration; |
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use Doctrine\DBAL\Connection; |
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use Doctrine\DBAL\Driver; |
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/** |
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* This is a connection wrapper that enables some retry functionality should the connection to the DB be lost for any |
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* reason. Especially useful on long running processes |
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*/ |
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class RetryConnection extends Connection |
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{ |
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private $shouldConnectionByRetried; |
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/** @var \ReflectionProperty */ |
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private $selfReflectionNestingLevelProperty; |
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/** |
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* RetryConnection constructor. |
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* |
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* @param array $params |
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* @param Driver $driver |
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* @param Configuration|null $config |
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* @param EventManager|null $eventManager |
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* |
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* @throws \Doctrine\DBAL\DBALException |
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* @SuppressWarnings(PHPMD.StaticAccess) |
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*/ |
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public function __construct( |
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array $params, |
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Driver $driver, |
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?Configuration $config = null, |
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?EventManager $eventManager = null |
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) { |
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$this->shouldConnectionByRetried = ShouldConnectionByRetried::createWithConfigParams($params); |
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parent::__construct($params, $driver, $config, $eventManager); |
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} |
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public function executeUpdate($query, array $params = [], array $types = []) |
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{ |
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$args = [$query, $params, $types]; |
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return $this->connectionWrapper(__FUNCTION__, $args, false); |
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} |
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private function connectionWrapper(string $function, array $args, bool $ignoreTransaction) |
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{ |
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$retryConnectionFlag = true; |
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$checkRetryConnection = $this->shouldConnectionByRetried; |
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$numberOfAttempts = 0; |
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$result = null; |
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while ($retryConnectionFlag === true) { |
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try { |
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$retryConnectionFlag = false; |
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$numberOfAttempts++; |
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$result = parent::$function(...$args); |
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} catch (\Exception $exception) { |
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$nestingLevel = $this->getTransactionNestingLevel(); |
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$retryConnectionFlag = $checkRetryConnection |
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->checkAndSleep( |
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$exception, |
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$numberOfAttempts, |
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$nestingLevel, |
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$ignoreTransaction |
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); |
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if ($retryConnectionFlag === false) { |
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throw $exception; |
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} |
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$this->close(); |
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$numberOfAttempts++; |
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if ($ignoreTransaction === true && 0 < $this->getTransactionNestingLevel()) { |
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$this->resetTransactionNestingLevel(); |
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} |
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} |
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} |
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return $result; |
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} |
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/** |
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* This is required because beginTransaction increment _transactionNestingLevel |
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* before the real query is executed, and results incremented also on gone away error. |
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* This should be safe for a new established connection. |
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*/ |
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private function resetTransactionNestingLevel(): void |
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{ |
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if (!$this->selfReflectionNestingLevelProperty instanceof \ReflectionProperty) { |
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$reflection = new \ReflectionClass(Connection::class); |
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$this->selfReflectionNestingLevelProperty = $reflection->getProperty('_transactionNestingLevel'); |
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$this->selfReflectionNestingLevelProperty->setAccessible(true); |
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} |
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$this->selfReflectionNestingLevelProperty->setValue($this, 0); |
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} |
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public function query(...$args) |
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{ |
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return $this->connectionWrapper('query', $args, false); |
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} |
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public function executeQuery($query, array $params = [], $types = [], QueryCacheProfile $qcp = null) |
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{ |
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$args = [$query, $params, $types, $qcp]; |
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return $this->connectionWrapper(__FUNCTION__, $args, false); |
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} |
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public function beginTransaction() |
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{ |
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if (0 !== $this->getTransactionNestingLevel()) { |
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parent::beginTransaction(); |
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} |
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$this->connectionWrapper(__FUNCTION__, [], true); |
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} |
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public function connect() |
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{ |
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return $this->connectionWrapper(__FUNCTION__, [], false); |
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} |
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/** |
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* @param string $sql |
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* |
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* @return Statement |
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*/ |
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public function prepare($sql): Statement |
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{ |
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return $this->prepareWrapped($sql); |
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} |
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/** |
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* returns a reconnect-wrapper for Statements. |
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* |
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* @param string $sql |
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* |
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* @return Statement |
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*/ |
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protected function prepareWrapped(string $sql): Statement |
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{ |
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return new Statement($sql, $this, $this->shouldConnectionByRetried); |
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} |
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/** |
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* do not use, only used by Statement-class |
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* needs to be public for access from the Statement-class. |
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* |
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* @internal |
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* |
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* @param string $sql |
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* |
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* @return Driver\Statement |
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* @throws \Doctrine\DBAL\DBALException |
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*/ |
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public function prepareUnwrapped(string $sql): Driver\Statement |
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{ |
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// returns the actual statement |
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return parent::prepare($sql); |
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} |
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} |
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edmondscommerce /
doctrine-static-meta
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