Yii2 console controller behavior. Prevents double run console command

OneInstance.php

<?php

namespace console\controllers\behaviors;

use Yii;
use yii\base\ActionEvent;
use yii\base\Behavior;
use yii\base\Exception;
use yii\console\Controller;

/**
 * Предотвращает одновременный запуск нескольких инстансов консольной команды
 * Class OneInstanceBehavior
 * @package console\components
 */
class OneInstanceBehavior extends Behavior
{
    /**
     * If process executes more than $longRunningTimeout seconds,
     * it will be considered as long-running
     * and warning message will be logged
     * @var int seconds
     */
    public $longRunningTimeout = 3600;

    /**
     * Start command if there isn't another active instance
     * @var bool
     */
    public $nonFailureShutdown = true;

    /**
     * @var string
     */
    protected $lockFileName;

    /**
     * @return array
     */
    public function events()
    {
        return [
            Controller::EVENT_BEFORE_ACTION => 'checkInstance',
            Controller::EVENT_AFTER_ACTION => 'cleanUp',
        ];
    }
    /**
     * @param ActionEvent $event
     * @throws Exception
     */
    public function checkInstance($event)
    {
        $this->lockFileName = Yii::$app->runtimePath . '/' . str_replace('/', '-', $event->action->uniqueId) . '.lock';
        if (file_exists($this->lockFileName)) {
            $processExists = file_exists('/proc/' . trim(file_get_contents($this->lockFileName)));
            if ($processExists) {
                $event->isValid = false;
                if (filemtime($this->lockFileName) + $this->longRunningTimeout < time()) {
                    throw new Exception("{$event->action->uniqueId} sleeped since " .
                        date('r', filemtime($this->lockFileName)));
                }
            } else {
                if ($this->nonFailureShutdown) {
                    @unlink($this->lockFileName);
                } else {
                    $event->isValid = false;
                    throw new Exception("{$event->action->uniqueId} failed since " .
                        date('r', filemtime($this->lockFileName)));
                }
            }
        } else {
            if (!file_put_contents($this->lockFileName, posix_getpid())) {
                throw new Exception('Can\'t write lock file ' . $this->lockFileName);
            }
        }
    }
    /**
     * @param ActionEvent $event
     */
    public function cleanUp($event)
    {
        if ($event->result == 0) {
            @unlink($this->lockFileName);
        }
    }
}