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