PdfJob.php

<?php
namespace Acme\JobQueueTest;

/*                                                                        *
 * This script belongs to the TYPO3 Flow package "Acme.JobQueueTest".     *
 *                                                                        *
 *                                                                        */

use TYPO3\Flow\Annotations as Flow;
use TYPO3\Flow\Utility\Files;
use TYPO3\Jobqueue\Common\Job\JobInterface;
use TYPO3\Jobqueue\Common\Queue\Message;
use TYPO3\Jobqueue\Common\Queue\QueueInterface;

class PdfJob implements JobInterface {

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

	/**
	 * @param string $text
	 */
	public function __construct($text) {
		$this->text = $text;
	}

	/**
	 * Execute the job
	 * A job should finish itself after successful execution using the queue methods.
	 *
	 * @param QueueInterface $queue
	 * @param Message $message The original message
	 * @return boolean TRUE if the job was executed successfully and the message should be finished
	 */
	public function execute(QueueInterface $queue, Message $message) {
		$filename = uniqid('pdf') . '.txt';
		file_put_contents(Files::concatenatePaths(array(FLOW_PATH_DATA, $filename)), $this->text);
		return TRUE;
	}

	/**
	 * Get an optional identifier for the job
	 *
	 * @return string A job identifier
	 */
	public function getIdentifier() {
		return NULL;
	}

	/**
	 * Get a readable label for the job
	 *
	 * @return string A label for the job
	 */
	public function getLabel() {
		return 'PDF Job';
	}
}

Settings.yaml

TYPO3:
  Jobqueue:
    Common:
      queues:
        'test':
          className: 'TYPO3\Jobqueue\Beanstalkd\Queue\BeanstalkdQueue' # or TYPO3\Jobqueue\Redis\Queue\RedisQueue, ...

StandardController.php

<?php
namespace Acme\JobQueueTest\Controller;

/*                                                                        *
 * This script belongs to the TYPO3 Flow package "Acme.JobQueueTest".     *
 *                                                                        *
 *                                                                        */

use Acme\FirstPackage\PdfJob;
use TYPO3\Flow\Annotations as Flow;
use TYPO3\Flow\Mvc\Controller\ActionController;

class StandardController extends ActionController {

	/**
	 * @Flow\Inject
	 * @var \TYPO3\Jobqueue\Common\Job\JobManager
	 */
	protected $jobManager;

	/**
	 * @param string $text
	 * @return void
	 */
	public function indexAction($text = 'default') {
		$this->createPdf($text);
		return 'Done!';
	}

	/**
	 * @param string $text
	 * @return void
	 */
	public function createPdf($text) {
		$pdfJob = new PdfJob($text);
		$this->jobManager->queue('test', $pdfJob);
	}

}