success case

ray2-mailer.php

<?php

abstract class MailerInterface {
    private $transport;

    /**
     * @Inject
     * @Named("transport_type")
     */
    public function __construct($transport)
    {
        $this->transport = $transport;
    }
}

class Mailer extends MailerInterface {}

ray2-newsletter-manager.php

<?php

class NewsletterManager
{
    private $mailer;

    /**
     * @Inject
     */
    public function __construct(MailerInterface $mailer)
    {
        $this->mailer = $mailer;
    }
}

ray2-success.php

<?php

use Doctrine\Common\Annotations\AnnotationRegistry;
use Ray\Di\Di\Inject;
use Ray\Di\Di\Named;
use Ray\Di\Injector;
use Ray\Di\AbstractModule;

$loader = require __DIR__.'/vendor/autoload.php';
AnnotationRegistry::registerLoader(array($loader, "loadClass"));

require "ray2-mailer.php";
require "ray2-newsletter-manager.php";

class NewsletterModule extends AbstractModule
{
    protected function configure()
    {
        $this->bind()->annotatedWith('transport_type')->toInstance('sendmail');
        $this->bind('MailerInterface')->to('Mailer');
    }
}

$di = Injector::create([new NewsletterModule]);

$newsletterManager = $di->getInstance('NewsletterManager');
var_dump($newsletterManager);