# Message Consumer

A Java team publishes events on RabbitMQ. Your PHP service needs to consume them — but they don't follow Ecotone's wire format. **Message Consumer** is the inbound adapter for arbitrary external messages, letting you connect to services written in any language or framework that share a broker with you. It's the counterpart to [Message Publisher](/modelling/microservices-php/message-publisher.md), and the right tool when you can't (or don't want to) put both ends on Ecotone's [Distributed Bus](/modelling/microservices-php/distributed-bus.md).

### Modules Providing Support

* [RabbitMQ Module](/modules/amqp-support-rabbitmq.md#message-consumer)

## Message Consumer Implementation

Consumer allow use to customize experience to fetch from chosen source:

```php
class Consumer
{
    // 1. Message Consumer
    #[MessageConsumer("consumer")]
    // 2. Method declaration
    public function execute(string $message, array $headers) : void
    {
        // do something with Message
        // if you have converter registered you can type hint exact type you expect
    }
}
```

1. `Message Consumer` - This tells Ecotone to consider given method to be message consumer.\
   First parameter is used as Consumer Name and this is how it will be run.
2. `Method declaration` - Depending how you define your [method declaration](/messaging/conversion/method-invocation.md), this way you will receive Message. In case of type hint for `string` then Message payload will be delivered to you as string (xml/json however it's formatted).

{% hint style="success" %}
Connecting Message Consumer to external broker, fetching message and converting it given class is done for you.\
\
All you need to do it set up [Extension Object ](#modules-providing-support)of given type in your [Service Context](/messaging/service-application-configuration.md) to use Message Consumer with given integration.
{% endhint %}


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