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<?php |
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declare(strict_types=1); |
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namespace Tomaj\Hermes\Driver; |
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use Closure; |
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use Predis\Client; |
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use Tomaj\Hermes\Dispatcher; |
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use Tomaj\Hermes\MessageInterface; |
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use Tomaj\Hermes\MessageSerializer; |
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use Tomaj\Hermes\Shutdown\ShutdownException; |
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class PredisSetDriver implements DriverInterface |
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{ |
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use MaxItemsTrait; |
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use ShutdownTrait; |
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use SerializerAwareTrait; |
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private $queues = []; |
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/** |
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* @var string |
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*/ |
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private $scheduleKey; |
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/** |
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* @var Client |
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*/ |
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private $redis; |
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/** |
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* @var integer |
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*/ |
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private $refreshInterval; |
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/** |
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* Create new PredisSetDriver |
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* |
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* This driver is using redis set. With send message it add new item to set |
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* and in wait() command it is reading new items in this set. |
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* This driver doesn't use redis pubsub functionality, only redis sets. |
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* |
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* Managing connection to redis is up to you and you have to create it outsite |
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* of this class. You will need to install predis php package. |
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* |
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* @see examples/redis |
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* |
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* @param Client $redis |
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* @param string $key |
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* @param integer $refreshInterval |
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* @param string $scheduleKey |
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*/ |
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public function __construct(Client $redis, string $key = 'hermes', int $refreshInterval = 1, string $scheduleKey = 'hermes_schedule') |
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{ |
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$this->setupPriorityQueue($key, Dispatcher::PRIORITY_MEDIUM); |
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$this->scheduleKey = $scheduleKey; |
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$this->redis = $redis; |
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$this->refreshInterval = $refreshInterval; |
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$this->serializer = new MessageSerializer(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function send(MessageInterface $message, int $priority = Dispatcher::PRIORITY_MEDIUM): bool |
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{ |
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if ($message->getExecuteAt() && $message->getExecuteAt() > microtime(true)) { |
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$this->redis->zadd($this->scheduleKey, [$message->getExecuteAt(), $this->serializer->serialize($message)]); |
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} else { |
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$key = $this->getKey($priority); |
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$this->redis->sadd($key, $this->serializer->serialize($message)); |
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} |
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return true; |
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} |
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public function setupPriorityQueue(string $name, int $priority): void |
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{ |
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$this->queues[$priority] = $name; |
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ksort($this->queues, SORT_ASC | SORT_NUMERIC); |
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} |
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private function getKey(int $priority): string |
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{ |
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if (!isset($this->queues[$priority])) { |
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throw new \Exception("Unknown priority {$priority}"); |
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} |
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return $this->queues[$priority]; |
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} |
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/**s |
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* {@inheritdoc} |
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* |
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* @throws ShutdownException |
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*/ |
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public function wait(Closure $callback, array $priorities = []): void |
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{ |
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$queues = array_reverse($this->queues, true); |
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while (true) { |
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$this->checkShutdown(); |
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if (!$this->shouldProcessNext()) { |
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break; |
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} |
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// check schedule |
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$messagesString = $this->redis->zrangebyscore($this->scheduleKey, '-inf', microtime(true), ['LIMIT' => ['OFFSET' => 0, 'COUNT' => 1]]); |
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if (count($messagesString)) { |
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foreach ($messagesString as $messageString) { |
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$this->redis->zrem($this->scheduleKey, $messageString); |
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$this->send($this->serializer->unserialize($messageString)); |
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} |
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} |
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$messageString = null; |
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$foundPriority = null; |
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foreach ($queues as $priority => $name) { |
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if (count($priorities) > 0 && !in_array($priority, $priorities)) { |
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continue; |
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} |
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if ($messageString !== null) { |
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break; |
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} |
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$key = $this->getKey($priority); |
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$messageString = $this->redis->spop($key); |
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$foundPriority = $priority; |
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} |
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if ($messageString !== null) { |
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$message = $this->serializer->unserialize($messageString); |
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$callback($message, $foundPriority); |
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$this->incrementProcessedItems(); |
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} else { |
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if ($this->refreshInterval) { |
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$this->checkShutdown(); |
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sleep($this->refreshInterval); |
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} |
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} |
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} |
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} |
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} |
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tomaj /
hermes
