RabbitMQ Support

Asynchronous PHP RabbitMQ

Installation
composer require ecotone/amqp
Module Powered By
​Enqueue solid and powerful abstraction over asynchronous queues.
Configuration
In order to use AMQP Support we need to add ConnectionFactory to our Dependency Container. 
Symfony
Laravel
Lite
# config/services.yaml
# You need to have RabbitMQ instance running on your localhost, or change DSN
    Enqueue\AmqpExt\AmqpConnectionFactory:
        class: Enqueue\AmqpExt\AmqpConnectionFactory
        arguments:
            - "amqp://guest:guest@localhost:5672//"
# Register AMQP Service in Provider
​
use Enqueue\AmqpExt\AmqpConnectionFactory;
​
public function register()
{
     $this->app->singleton(AmqpConnectionFactory::class, function () {
         return new AmqpConnectionFactory("amqp+lib://guest:guest@localhost:5672//");
     });
}
use Enqueue\AmqpExt\AmqpConnectionFactory;
​
$application = EcotoneLiteApplication::boostrap(
    [
        AmqpConnectionFactory::class => new AmqpConnectionFactory("amqp+lib://guest:guest@localhost:5672//")
    ]
);
We register our AmqpConnection under the class name Enqueue\AmqpExt\AmqpConnectionFactory. This will help Ecotone resolve it automatically, without any additional configuration.
Message Channel
To create AMQP Backed Message Channel (RabbitMQ Channel), we need to create Service Context. 
class MessagingConfiguration
{
    #[ServiceContext] 
    public function orderChannel()
    {
        return AmqpBackedMessageChannelBuilder::create("orders");
    }
}
Now orders channel will be available in our Messaging System. 
Message Channel Configuration
DbalBackedMessageChannelBuilder::create("orders")
    ->withAutoDeclare(false) // do not auto declare queue
    ->withDefaultTimeToLive(1000) // limit TTL of messages
Distributed Publisher and Consumer
To create distributed publisher or consumer provide Service Context.
Distributed Publisher
class MessagingConfiguration
{
    #[ServiceContext] 
    public function distributedPublisher()
    {
        return AmqpDistributedBusConfiguration::createPublisher();
    }
}
Distributed Consumer
class MessagingConfiguration
{
    #[ServiceContext] 
    public function distributedConsumer()
    {
        return AmqpDistributedBusConfiguration::createConsumer();
    }
}
Message Publisher
If you want to publish Message directly to Exchange, you may use of Publisher.
class AMQPConfiguration
{
    #[ServiceContext] 
    public function registerAmqpConfig()
    {
        return 
            AmqpMessagePublisherConfiguration::create(
                MessagePublisher::class, // 1
                "delivery", // 2
                "application/json" // 3
            );
    }
}
1.Reference name -  Name under which it will be available in Dependency Container.
2.Exchange name - Name of exchange where Message should be published
3.Default Conversion [Optional] - Default type, payload will be converted to.
Publisher Configuration
AmqpMessagePublisherConfiguration::create(
    MessagePublisher::class,
    "delivery"
)
    ->withDefaultPersistentDelivery(true) // 1
    ->withDefaultRoutingKey("someKey") // 2
    ->withRoutingKeyFromHeader("routingKey") // 3
    ->withHeaderMapper("application.*") // 4
1.withDefaultPersistentDelivery - should AMQP messages be persistent.
2.withDefaultRoutingKey - default routing key added to AMQP message 
3.withRoutingKeyFromHeader - should routing key be retrieved from header with name
4.withHeaderMapper - On default headers are not send with AMQP message. You map provide mapping for headers that should be mapped to AMQP Message
Message Consumer
To connect consumer directly to a AMQP Queue, we need to provide Ecotone with information, how the Queue is configured. 
class AmqpConfiguration
{
    #[ServiceContext] 
    public function registerAmqpConfig(): array
    {
        return [
            AmqpQueue::createWith("orders"), // 1
            AmqpExchange::createDirectExchange("system"), // 2
            AmqpBinding::createFromNames("system", "orders", "placeOrder"), // 3
            AmqpMessageConsumerConfiguration::create("consumer", "orders") // 4
        ];
    }
}
1.AmqpQueue::createWith(string $name) - Registers Queue with specific name
2.AmqpExchange::create*(string $name) - Registers of given type with specific name
3.AmqpBinding::createFromName(string $exchangeName, string $queueName, string $routingKey)- Registering binding between exchange and queue
4.Provides Consumer that will be registered at given name "consumer" and will be polling "orders" queue
Available Exchange configurations
$amqpExchange = AmqpExchange::createDirectExchange
$amqpExchange = AmqpExchange::createFanoutExchange
$amqpExchange = AmqpExchange::createTopicExchange
$amqpExchange = AmqpExchange::createHeadersExchange
​
$amqpExchange = $amqpExchange
    ->withDurability(true) // exchanges survive broker restart
    ->withAutoDeletion() // exchange is deleted when last queue is unbound from it
Available Queue configurations
$amqpQueue = AmqpQueue::createDirectExchange
                ->withDurability(true) // the queue will survive a broker restart
                ->withExclusivity() // used by only one connection and the queue will be deleted when that connection closes
                ->withAutoDeletion() // queue that has had at least one consumer is deleted when last consumer unsubscribes
                ->withDeadLetterExchangeTarget($amqpExchange);
Publisher Transactions
Ecotone AMQP comes with support for RabbitMQ Transaction for published messages. 
This means that, if you send more than one message at time, it will be commited together.
If you want to enable/disable for all Asynchronous Endpoints or specific for Command Bus. You may use of ServiceContext. 
By default RabbitMQ transactions are disabled, as you may ensure consistency using Resilient Sending.
class ChannelConfiguration
{
    #[ServiceContext]
    public function registerTransactions() : array
    {
        return [
            AmqpConfiguration::createWithDefaults()
                ->withTransactionOnAsynchronousEndpoints(false)
                ->withTransactionOnCommandBus(false)
        ];
    }
​
}
To enable transactions on specific endpoint if default is disabled, mark consumer with Ecotone\Amqp\AmqpTransaction\AmqpTransaction annotation.
    #[AmqpTransaction)]
    #[MessageConsumer("consumer")]
    public function execute(string $message) : void
    {
        // do something with Message
    }

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