MyController.php

<?php

class MyController
{
    public function webserviceAction($some, $thing)
    {
        $message = array(
            'type'  => 'webservice',
            'some'  => $some,
            'thing' => $thing,
        );
        
        $this->get('rabbitmq_publisher')->publish(json_encode($message));
    }
}