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RabbitMQ (Enterprise Edition Only)

AmqpMessageQueue Component

The component incorporates message queue in your application via different transports. It contains several layers.

The lowest layer is called Transport and it provides an abstraction of transport protocol. The Consumption layer provides the tools to consume messages, such as the cli command, signal handling, logging, extensions. It works on top of the transport layer.

The Client layer provides the ability to start producing\consuming messages with as little configuration as possible.

Installation

You need to have RabbitMQ version 3.7.21 and above installed to use the AMQP transport. To install the RabbitMQ you should follow the download and installation manual.

After the installation, please check that you have all the required plugins installed and enabled.

Minimum Permissions

Note

You might want to read more on access control.

Your credentials must meet the next minimum requirements:

You have access to the requested rabbitmq’s virtual host (/ by default).
You need to have the next permissions: configure, write, read. It could be a default value .* or a stricter oro\..*.

RabbitMQ Plugins

Required plugins

Plugin name	Version	Appointment
rabbitmq_del ayed_message _exchange	3.8.0	A plugin that adds delayed-messaging (or scheduled-messaging) to RabbitMQ. Read more on Delayed Message Exchange.

The plugin rabbitmq_delayed_message_exchange is necessary for the proper work but it is not installed by default, so you need to download, install and enable it.

To download it, use the following command:

wget https://github.com/rabbitmq/rabbitmq-delayed-message-exchange/releases/download/v3.8.0/rabbitmq_delayed_message_exchange-3.8.0.ez -P $RABBITMQ_HOME/plugins

To enable it, use the following command:

rabbitmq-plugins enable --offline rabbitmq_delayed_message_exchange

Recommended plugins

Plugin name	Version	Appointment
rabbitmq_management	3.8.*	Provides an HTTP-based API for management and monitoring of your RabbitMQ server. Read more on Management

Plugins management

To enable plugins, use the rabbitmq-plugins tool: rabbitmq-plugins enable plugin-name

And to disable plugins again, use: rabbitmq-plugins disable plugin-name

To see the list of enabled plugins, use: rabbitmq-plugins list -e

You will see something like:

[E*] rabbitmq_delayed_message_exchange 3.8.0
[E*] rabbitmq_management               3.8.2
[e*] rabbitmq_management_agent         3.8.2
[e*] rabbitmq_web_dispatch             3.8.2

The sign [E*] means that the plugin was explicitly enabled, i.e. somebody enabled it manually. The sign [e*] means the plugin was implicitly enabled, i.e. enabled automatically as it was required for a different enabled plugin.

Queues

If you use only this component, you are free to create any queues you want and as many as you need. If you use the Client abstraction with this transport, the next queues will be created: oro.default and oro.default.delayed. The first keeps all sent messages, and the seconds keeps broken message that have to be delayed and redelivered later. You can still have more queues by explicitly configuring the message processor destinationName option.

Default Queue Presets

Exchanges

Name	Type	Features
oro.default	fanout	durable: true
oro.default.delayed	x-delayed-message	durable: true; x-delayed-type: fanout

Queues

Name	Features
oro.default	durable: true; x-max-priority: 4

Delaying Messages

In order to use delayed message with RabbitMQ broker, you have to install its plugin. Read more on scheduling messages on RabbitMQ website.

Usage

Usage is similar to one described in the message queue component. Here, we will show you how to get amqp connection. We are assuming the RabbitMQ is used as a broker with minimum configuration.

use Oro\Component\AmqpMessageQueue\Transport\Amqp\AmqpConnection;

$connection = AmqpConnection::createFromConfig([
    'host' => '127.0.0.1',
    'port' => 5672,
    'user' =>  'guest',
    'password' => 'guest',
    'vhost' => '/',
]);

In order to use the component with the symfony application, you first have to register the amqp transport factory (). And tell the message queue bundle to use it.

namespace Oro\Bundle\AmqpMessageQueueBundle;

use Oro\Bundle\MessageQueueBundle\DependencyInjection\OroMessageQueueExtension;
use Oro\Component\AmqpMessageQueue\DependencyInjection\AmqpTransportFactory;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Bundle\Bundle;

class AcmeCoreBundle extends Bundle
{
    /**
     * {@inheritdoc}
     */
    public function build(ContainerBuilder $container): void
    {
        parent::build($container);

        /** @var OroMessageQueueExtension $extension */
        $extension = $container->getExtension('oro_message_queue');
        $extension->addTransportFactory(new AmqpTransportFactory());
    }
}

Tip

You can use AmqpMessageQueueBundle to register the factory automatically

You can use the ORO_MQ_DSN environment variable:

ORO_MQ_DSN=amqp://guest:guest@localhost:5672/%2Fmaster

When configuring a virtual host (vhost), ensure that the vhost is URL encoded. If no vhost is provided, the default value of / is used. For example, if the vhost is /master, the corresponding url encoded vhost value is %2Fmaster, and if the vhost is master,the url encoded value is master.

RabbitMQ Useful Hints

You can see the RabbitMQ default web interface here, if the rabbitmq_management plugin is enabled: http://localhost:15672/. Read more on Management.
You can temporary stop RabbitMQ by running the command rabbitmqctl stop_app. The command will stop the RabbitMQ application, leaving the Erlang node running. You can resume it with the command rabbitmqctl start_app. Read more on rabbitmqctl(8).