ruleexample.php

<?php
 
namespace Bitrix\Calendar\Core\Queue\Examples;
 
use Bitrix;
use Bitrix\Calendar\Core\Queue\Interfaces;
use Bitrix\Calendar\Core\Queue\Interfaces\Message;
use Bitrix\Calendar\Core\Queue\Message\Dictionary;
use Bitrix\Calendar\Core\Queue\Queue\Queue;
use Bitrix\Calendar\Core\Queue\Queue\QueueFactory;
use Bitrix\Calendar\Core\Queue\Queue\QueueRegistry;
use Bitrix\Calendar\Core\Queue\Rule\Rules\DbRule;
 
class RuleExample extends DbRule implements Interfaces\RouteRule
{
    protected function getTargetQueue(Message $message): ?Queue
    {
        $routingKey = $message->getHeaders()[Dictionary::HEADER_KEYS['routingKey']] ?? null;
        if ($routingKey === 'example')
        {
            $queue = (new QueueFactory())->getById(QueueRegistry::QUEUE_LIST['Example']);
            return $queue;
        }
 
        return null;
    }
 
    protected function getMessageHash(Message $message): string
    {
        return 'ExamplePrefix_' . $message->getBody()['exampleField'];
    }
}