73 lines
1.7 KiB
PHP
73 lines
1.7 KiB
PHP
<?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\Lock\Factory;
|
|
use Symfony\Component\Lock\Lock;
|
|
use Symfony\Component\Lock\Store\FlockStore;
|
|
use Symfony\Component\Lock\Store\SemaphoreStore;
|
|
|
|
/**
|
|
* Basic lock feature for commands.
|
|
*
|
|
* @author Geoffrey Brier <geoffrey.brier@gmail.com>
|
|
*/
|
|
trait LockableTrait
|
|
{
|
|
/** @var Lock */
|
|
private $lock;
|
|
|
|
/**
|
|
* Locks a command.
|
|
*
|
|
* @return bool
|
|
*/
|
|
private function lock($name = null, $blocking = false)
|
|
{
|
|
if (!class_exists(SemaphoreStore::class)) {
|
|
throw new RuntimeException('To enable the locking feature you must install the symfony/lock component.');
|
|
}
|
|
|
|
if (null !== $this->lock) {
|
|
throw new LogicException('A lock is already in place.');
|
|
}
|
|
|
|
if (SemaphoreStore::isSupported($blocking)) {
|
|
$store = new SemaphoreStore();
|
|
} else {
|
|
$store = new FlockStore();
|
|
}
|
|
|
|
$this->lock = (new Factory($store))->createLock($name ?: $this->getName());
|
|
if (!$this->lock->acquire($blocking)) {
|
|
$this->lock = null;
|
|
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Releases the command lock if there is one.
|
|
*/
|
|
private function release()
|
|
{
|
|
if ($this->lock) {
|
|
$this->lock->release();
|
|
$this->lock = null;
|
|
}
|
|
}
|
|
}
|