Symfony Messenger和Mailer：如何添加binding_key？

问题描述

我有一个正在运行的Symfony 4.4项目，其中包含Messenger和RabbitMQ。 我有2个队列的异步传输。

    transports:
        # https://symfony.com/doc/current/messenger.html#transport-configuration
      async:
        dsn: '%env(MESSENGER_TRANSPORT_DSN)%'
        options:
          exchange:
            name: myexchange
            type: direct
          queues:
            email:
              binding_keys:
                - email
            extranet:
              binding_keys:
                  - extranet
        # failed: 'doctrine://default?queue_name=failed'
        # sync: 'sync://'

    routing:
        # Route your messages to the transports
        'App\Message\ExtranetMessage': async
        'Symfony\Component\Mailer\Messenger\SendEmailMessage': async

我需要将包含symfony/mailer组件的电子邮件发送到电子邮件队列。

public function contact(Request $request,MailerInterface $mailer)
{
    if($request->isXmlHttpRequest())
    {
        //dd($request->request->all());
        $body =
            'Nouveau message depuis le front<br />
             Nom = '.$request->request->get('nom').'<br />
             Prénom = '.$request->request->get('prenom').'<br />
             Société = '.$request->request->get('societe').'<br />
             Email = '.$request->request->get('mail').'<br />';

        $email = (new Email())
            ->from('[e-mail]')
            ->replyTo($request->request->get('mail'))
            ->to('$request->request->get('mail')')
            ->subject('test')
            ->html($body);

        $mailer->send($email);

        return new JsonResponse('OK',200);
    }
}

如何将binding_key添加到mailer以便让RabbitMQ知道如何处理电子邮件？

解决方法

可以指定via stamps路由键。不幸的是，邮件程序集成没有提供添加它们的方法，它只是将邮件分派到默认队列。但是您仍然可以手动发送消息：

t1 = datetime(2002,02,01);
t2 = datetime(2019,11,01);
t = t1:calmonths:t2;
t= datenum(char(t),'dd-mm-yyyy');

figure;
hold on

% 1st shaded area
d1=datenum(datetime(2003,01,01));
d2=datenum(datetime(2015,10,01));
x=[[d1,d2],[d2,d1],d1];
y=[-[3,3],[3,[-3]];
fill(x,y,'r');

% 2nd shaded area
d1=datenum(datetime(2009,04,01));
d2=datenum(datetime(2010,'g');

% Time-series
plot(t,randn(214,1),'LineWidth',1,'Color',[0 0 0]);
ax.XTick = t(1:end);
datetick('x','yyyy','keepticks');
yline(0,'-')
ylabel('%')

这种方法有一些局限性：由于未使用$this->dispatchMessage(new SendEmailMessage($email),[new AmqpStamp('email')]); 代码，因此不会分派mailer，并且探查器中的“电子邮件”窗格为空。

另一种选择是使用中间件添加印章：

1. 创建中间件

MessageEvent

1. 将中间件添加到总线配置中：

// src/Messenger/StampEmailMessageMiddleware.php
class StampEmailMessageMiddleware implements MiddlewareInterface
{
    const bindingKey = 'email';

    public function handle(Envelope $envelope,StackInterface $stack): Envelope
    {
        // Add the stamp. Since the middleware gets called both when dispatching and 
        // consuming the message,we make sure there's no stamp already added.
        if (
            $envelope->getMessage() instanceof SendEmailMessage && 
            null === $envelope->last(AmqpStamp::class)
        ) {
            $envelope = $envelope->with(new AmqpStamp(self::bindingKey));
        }

        return $stack->next()->handle($envelope,$stack);
    }
}

1. 正常发送消息：

# config/packages/messenger.yaml
messenger:
    buses:
        messenger.bus.default:
            middleware:
                - 'App\Messenger\StampEmailMessageMiddleware'

,

好吧，我在搜索完整的Messenger配置参考时找到了答案。

为了处理不带绑定键的消息，必须添加一个default_publish_routing_key条目。 现在的配置如下：

    transports:
        # https://symfony.com/doc/current/messenger.html#transport-configuration
      async:
        dsn: '%env(MESSENGER_TRANSPORT_DSN)%'
        options:
          exchange:
            name: myexchange
            type: direct
            default_publish_routing_key: email
          queues:
            email:
              binding_keys:
                - email
            extranet:
              binding_keys:
                  - extranet
        # failed: 'doctrine://default?queue_name=failed'
        # sync: 'sync://'

    routing:
        # Route your messages to the transports
        'App\Message\ExtranetMessage': async
        'Symfony\Component\Mailer\Messenger\SendEmailMessage': async

如果没有指定任何队列，这将允许Messenger组件处理消息事件。