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File: vendor/symfony/console/Command/LockableTrait.php

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File: vendor/symfony/console/Command/LockableTrait.php
Role: Class source
Content type: text/plain
Description: Class source
Class: PHP Pokemon Script
Provides an API to manage a database of Pokemons
Author: By
Last change:
Date: 2 years ago
Size: 1,501 bytes
 

 

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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;
        }
    }
}