MessagePriority

Raxos\MessageBus\Enum\MessagePriority is a backed integer enum with the five priority levels you can set when publishing a message. The value maps directly to the AMQP priority of the message, and queues are declared with a maximum priority of five so all levels are honoured.

enum MessagePriority: int
{
    case VERY_LOW = 1;
    case LOW = 2;
    case NORMAL = 3;
    case HIGH = 4;
    case VERY_HIGH = 5;
}

Cases

Case	Value
VERY_LOW	1
LOW	2
NORMAL	3
HIGH	4
VERY_HIGH	5

NORMAL is the default used by MessageBusQueue::publish() when no priority is given. Higher priority messages waiting on a queue are delivered before lower priority ones.

Usage

use Raxos\MessageBus\Enum\MessagePriority;

$queue->publish(new SendWelcomeEmailMessage($userId), MessagePriority::HIGH);
$queue->publish(new RebuildSearchIndexMessage(), MessagePriority::VERY_LOW);

See also

• Publishing and consuming: how priority affects delivery.
• MessageBusQueue: the publish() method that accepts a priority.