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- <?php
- /*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
- namespace Symfony\Component\Console\Command;
- use Symfony\Component\Console\Exception\LogicException;
- use Symfony\Component\Console\Exception\RuntimeException;
- use Symfony\Component\Filesystem\LockHandler;
- /**
- * Basic lock feature for commands.
- *
- * @author Geoffrey Brier <geoffrey.brier@gmail.com>
- */
- trait LockableTrait
- {
- private $lockHandler;
- /**
- * Locks a command.
- *
- * @return bool
- */
- private function lock($name = null, $blocking = false)
- {
- if (!class_exists(LockHandler::class)) {
- throw new RuntimeException('To enable the locking feature you must install the symfony/filesystem component.');
- }
- if (null !== $this->lockHandler) {
- throw new LogicException('A lock is already in place.');
- }
- $this->lockHandler = new LockHandler($name ?: $this->getName());
- if (!$this->lockHandler->lock($blocking)) {
- $this->lockHandler = null;
- return false;
- }
- return true;
- }
- /**
- * Releases the command lock if there is one.
- */
- private function release()
- {
- if ($this->lockHandler) {
- $this->lockHandler->release();
- $this->lockHandler = null;
- }
- }
- }
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