Listener de upload para OneupUploaderBundle que integra com Plupload.

Meu\AppBundle\EventListener\UploadListener.php

<?php

namespace Meu\AppBundle\EventListener;

use Oneup\UploaderBundle\Event\PostPersistEvent;

class UploadListener
{
    protected $service;

    public function __construct($service)
    {
        $this->service = $service;
    }

    public function onUpload(PostPersistEvent $event)
    {
        $response = $event->getResponse();
        $result = $this->service->process($event->getFile());

        $response['success'] = true;

        if($result === false) {
            throw new \Exception('Arquivo não processado!');
        }
    }
}

Meu\AppBundle\Resources\config\services.xml

<?xml version="1.0" ?>

<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
    
    <services>
        <service id="meu_app.upload_listener" class="Meu\AppBundle\EventListener\UploadListener">
            <argument type="service" id="meu_app.services.fotos" />
            <tag name="kernel.event_listener" event="oneup_uploader.post_persist.fotos" method="onUpload" />
        </service>
    </services>
</container>