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<?php |
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namespace BrainExe\Core\MessageQueue; |
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use BrainExe\Annotations\Annotations\Service; |
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use BrainExe\Core\EventDispatcher\AbstractEvent; |
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use BrainExe\Core\Traits\IdGeneratorTrait; |
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use BrainExe\Core\Traits\RedisTrait; |
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use BrainExe\Core\Traits\TimeTrait; |
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use Generator; |
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/** |
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* @api |
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* @Service("MessageQueue.Gateway", public=false) |
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*/ |
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class Gateway |
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{ |
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use TimeTrait; |
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use RedisTrait; |
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use IdGeneratorTrait; |
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const QUEUE_DELAYED = 'message_queue:delayed'; |
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const QUEUE_IMMEDIATE = 'message_queue:immediate'; |
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const META_DATA = 'message_queue:meta_data'; |
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const RETRY_TIME = 3600; // try again after 1 hour |
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/** |
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* @param string $eventId |
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* @param string $eventType |
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* @return bool success |
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*/ |
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public function deleteEvent(string $eventId, string $eventType = null) : bool |
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{ |
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if (!empty($eventType)) { |
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$eventId = sprintf('%s:%s', $eventType, $eventId); |
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} |
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$redis = $this->getRedis(); |
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$delayed = $redis->zrem(self::QUEUE_DELAYED, $eventId); |
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if ($delayed) { |
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$redis->hdel(self::META_DATA, [$eventId]); |
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return true; |
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} |
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$immediate = $this->getRedis()->lrange(self::QUEUE_IMMEDIATE, 0, 100); |
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foreach ($immediate as $rawJob) { |
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list($jobId) = explode('#', $rawJob, 2); |
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if (strpos($jobId, "$eventId") === 0) { |
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return (bool)$this->redis->lrem(self::QUEUE_IMMEDIATE, 1, $rawJob); |
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} |
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} |
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return false; |
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} |
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/** |
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* @param AbstractEvent $event |
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* @param int $timestamp |
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* @return string |
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*/ |
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public function addEvent(AbstractEvent $event, int $timestamp = 0) |
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{ |
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$randomId = $this->generateUniqueId('jobid'); |
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$jobId = sprintf('%s:%s', $event->eventName, $randomId); |
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$job = new Job($event, $jobId, $timestamp); |
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$this->addJob($job); |
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} |
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/** |
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* @param Job $job |
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*/ |
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public function addJob(Job $job) |
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{ |
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$serialized = base64_encode(serialize($job)); |
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$pipeline = $this->getRedis()->pipeline(['fire-and-forget' => true]); |
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if (empty($job->timestamp)) { |
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// immediate execution in background |
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$pipeline->lpush(self::QUEUE_IMMEDIATE, $job->jobId . '#' . $serialized); |
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} else { |
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// delayed execution |
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$pipeline->hset(self::META_DATA, $job->jobId, $serialized); |
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$pipeline->zadd(self::QUEUE_DELAYED, (int)$job->timestamp, $job->jobId); |
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} |
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$pipeline->execute(); |
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} |
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/** |
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* @param string $eventType |
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* @param int $since |
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* @return Job[] |
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*/ |
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public function getEventsByType(string $eventType = null, int $since = 0) : array |
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{ |
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return iterator_to_array($this->getEventsByTypeGenerator($eventType, $since)); |
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} |
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/** |
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* @param string $eventType |
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* @param int $since |
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* @return Generator|Job[] |
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*/ |
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public function getEventsByTypeGenerator(string $eventType = null, int $since = 0) : Generator |
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{ |
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$redis = $this->getRedis(); |
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$resultRaw = $redis->zrangebyscore( |
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self::QUEUE_DELAYED, |
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$since, |
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'+inf', |
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['withscores' => true] |
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); |
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$keys = []; |
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foreach ($resultRaw as $jobId => $timestamp) { |
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if (empty($eventType) || strpos($jobId, $eventType . ":") === 0) { |
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$keys[$jobId] = $timestamp; |
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} |
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} |
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yield from $this->getFromTimesQueue($keys); |
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yield from $this->getFromImmediateQueue(); |
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} |
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/** |
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* @param Job $job |
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*/ |
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public function restoreJob(Job $job) |
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{ |
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$now = $this->now(); |
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$job->timestamp = $now + self::RETRY_TIME; |
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$job->errorCounter++; |
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$this->addJob($job); |
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} |
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/** |
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* @return int |
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*/ |
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public function countAllJobs() : int |
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{ |
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$delayed = $this->getRedis()->zcard(self::QUEUE_DELAYED); |
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$immediate = $this->getRedis()->llen(self::QUEUE_IMMEDIATE); |
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return $delayed + $immediate; |
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} |
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/** |
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* @param array $keys |
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* @return Generator |
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*/ |
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private function getFromTimesQueue(array $keys) : Generator |
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{ |
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if (!empty($keys)) { |
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$events = $this->getRedis()->hmget(self::META_DATA, array_keys($keys)); |
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foreach ($events as $jobId => $rawJob) { |
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/** @var Job $job */ |
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$job = unserialize(base64_decode($rawJob)); |
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yield $job->jobId => $job; |
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} |
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} |
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} |
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/** |
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* @return Generator |
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*/ |
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private function getFromImmediateQueue() : Generator |
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{ |
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$immediate = $this->getRedis()->lrange(self::QUEUE_IMMEDIATE, 0, 100); |
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foreach ($immediate as $rawJob) { |
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list($jobId, $rawJob) = explode('#', $rawJob, 2); |
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if (empty($eventType) || strpos($jobId, $evenotType . ":") === 0) { |
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/** @var Job $job */ |
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$job = unserialize(base64_decode($rawJob)); |
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yield $job->jobId => $job; |
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} |
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} |
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} |
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} |
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It is generally a best practice as it is often more readable to use concatenation instead of interpolation for variables inside strings.