Allows to use Symfony Messenger with Symfony 3.4 and 4.0.

• Installation
• Configuration
• How to use

1. Add dependency with composer

composer require lendable/symfony-messenger-polyfill

2. Register the bundle in your bundles.php

return [
    //...
    Lendable\Polyfill\Symfony\MessengerBundle\MessengerBundle::class => ['all' => true],
];

The only important thing is that root key is lendable_polyfill_messenger.

Everything is explained in the Symfony Documentation.

If we take this configuration example, instead of writing:

# config/packages/messenger.yaml
framework:
    messenger:
        routing:
            'My\Message\Message':  amqp # The name of the defined transport

You would write:

# config/packages/messenger.yaml
lendable_polyfill_messenger:
    routing:
        'My\Message\Message':  amqp # The name of the defined transport