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<?php |
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/** |
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* PHP version 5.4 and 7 |
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* |
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* @package Payever\Core |
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* @author Hennadii.Shymanskyi <[email protected]> |
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* @copyright 2017-2019 payever GmbH |
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* @license MIT <https://opensource.org/licenses/MIT> |
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*/ |
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namespace Payever\ExternalIntegration\Core\Lock; |
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/** |
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* PHP version 5.4 and 7 |
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* |
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* @package Payever\Core |
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* @author Hennadii.Shymanskyi <[email protected]> |
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* @copyright 2017-2019 payever GmbH |
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* @license MIT <https://opensource.org/licenses/MIT> |
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*/ |
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class FileLock implements LockInterface |
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{ |
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const SLEEP_SECONDS = 1; |
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/** @var string */ |
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private $directory; |
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/** |
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* FileLock constructor. |
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* |
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* @param string $directory |
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*/ |
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public function __construct($directory) |
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{ |
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if (!is_writable($directory)) { |
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throw new \UnexpectedValueException(sprintf('Directory %s is not writable', $directory)); |
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} |
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$this->directory = $directory; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function acquireLock($lockName, $timeout) |
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{ |
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$filename = $this->getLockFileName($lockName); |
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$this->waitForUnlock($filename, $timeout); |
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$this->releaseLock($lockName); |
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$this->lock($filename); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function releaseLock($lockName) |
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{ |
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$filename = $this->getLockFileName($lockName); |
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$this->unlock($filename); |
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} |
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/** |
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* @param string $name |
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* |
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* @return string |
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*/ |
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private function getLockFileName($name) |
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{ |
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return $this->directory . DIRECTORY_SEPARATOR . $name . ".lock"; |
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} |
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/** |
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* @param string $filename |
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*/ |
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private function lock($filename) |
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{ |
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$handle = fopen($filename, "w"); |
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fclose($handle); |
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} |
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/** |
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* @param string $filename |
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*/ |
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private function unlock($filename) |
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{ |
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if (file_exists($filename)) { |
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unlink($filename); |
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} |
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} |
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/** |
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* @param string $filename |
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* @param int $timeout |
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*/ |
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private function waitForUnlock($filename, $timeout) |
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{ |
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if (file_exists($filename)) { |
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$maxTimestamp = filectime($filename) + $timeout; |
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while (file_exists($filename) && time() < $maxTimestamp) { |
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sleep(self::SLEEP_SECONDS); |
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} |
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} |
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} |
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} |
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payeverworldwide /
sdk-php
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