File: config/packages/messenger.yaml

framework:
    messenger:
        # Uncomment this (and the failed transport below) to send failed messages to this transport for later handling.
        # failure_transport: failed

        transports:
            async: "%env(MESSENGER_TRANSPORT_DSN)%"
            sync: 'sync://'
        default_bus: messenger.bus.command
        buses:
            messenger.bus.command:
                middleware:
                    - validation
            messenger.bus.query:
                middleware:
                    - validation
            messenger.bus.event:
                default_middleware: allow_no_handlers

        routing:
            'App\Core\Application\Command\AsyncCommand': async
            'App\Core\Application\Command\SyncCommand': sync
            'App\Core\Application\Query\SyncQuery': sync