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<?php |
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namespace BenTools\SimpleDBAL\Model\Adapter\Mysqli; |
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use GuzzleHttp\Promise\Promise; |
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use GuzzleHttp\Promise\PromiseInterface; |
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use mysqli; |
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use mysqli_result; |
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use mysqli_sql_exception; |
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final class MysqliAsync implements \Countable |
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{ |
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private $queries = []; |
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private $processed = 0; |
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private static $instance; |
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private static $sleep = 0; |
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private static $usleep = 50000; |
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/** |
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* MysqliAsync constructor. |
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* Disabled to force singleton use. |
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*/ |
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private function __construct() |
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{ |
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} |
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/** |
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* @param string $query |
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* @param mysqli $cnx |
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* @return Promise |
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*/ |
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public static function query(string $query, mysqli $cnx) |
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{ |
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$promise = new Promise(function () { |
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self::getInstance()->wait(); |
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}); |
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$cnx->query($query, MYSQLI_ASYNC); |
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self::getInstance()->queries[] = [ |
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'l' => $cnx, |
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'p' => $promise, |
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]; |
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return $promise; |
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} |
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/** |
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* @return MysqliAsync |
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*/ |
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public static function getInstance() |
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{ |
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if (null === self::$instance) { |
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self::$instance = new self; |
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} |
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return self::$instance; |
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} |
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/** |
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* Poll every $wait seconds. |
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* To poll every 100ms, call pollEvery(0.100). |
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* |
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* @param float $wait |
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*/ |
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public static function pollEvery(float $wait) |
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{ |
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if (false === strpos((string) $wait, '.')) { |
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self::$sleep = (int) $wait; |
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self::$usleep = 0; |
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} else { |
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list($seconds, $hundreds) = explode('.', (string) $wait); |
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self::$sleep = (int) $seconds; |
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self::$usleep = (int) (((float) sprintf('0.%d', $hundreds)) * 1000000); |
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} |
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} |
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/** |
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* @param array $query |
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* @return mysqli |
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*/ |
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private function getConnection(array $query): mysqli |
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{ |
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return $query['l']; |
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} |
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/** |
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* @param array $query |
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* @return PromiseInterface |
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*/ |
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private function getPromise(array $query): PromiseInterface |
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{ |
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return $query['p']; |
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} |
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/** |
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* Resets current pool. |
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*/ |
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private function reset() |
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{ |
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$this->queries = []; |
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$this->processed = 0; |
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} |
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/** |
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* Wait for pending queries to complete. |
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*/ |
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private function wait() |
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{ |
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do { |
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if (empty($this->queries)) { |
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break; |
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} |
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$links = $errors = $reject = []; |
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foreach ($this->queries as $link) { |
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$links[] = $errors[] = $reject[] = $link['l']; |
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} |
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if (!mysqli_poll($links, $errors, $reject, self::$sleep, self::$usleep)) { |
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continue; |
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} |
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foreach ($this->queries as $l => $link) { |
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$promise = $this->getPromise($link); |
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$cnx = $this->getConnection($link); |
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try { |
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$result = $cnx->reap_async_query(); |
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if ($result instanceof mysqli_result) { |
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$promise->resolve($result); |
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} else { |
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$errNo = mysqli_errno($cnx); |
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$errStr = mysqli_error($cnx); |
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if (0 !== $errNo || 0 !== strlen($errStr)) { |
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throw new mysqli_sql_exception($errStr, $errNo); |
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} else { |
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$promise->resolve($cnx); |
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} |
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} |
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} catch (mysqli_sql_exception $e) { |
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$promise->reject($e); |
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} |
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$this->processed++; |
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unset($this->queries[$l]); |
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} |
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} while ($this->processed < count($this->queries)); |
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$this->reset(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function count() |
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{ |
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return count($this->queries); |
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} |
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} |
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bpolaszek /
simple-dbal
