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<?php |
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/** |
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* Nextcloud - OCR |
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* This file is licensed under the Affero General Public License version 3 or |
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* later. See the COPYING file. |
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* |
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* @author Janis Koehr <[email protected]> |
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* @copyright Janis Koehr 2017 |
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*/ |
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namespace OCA\Ocr\Service; |
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use Exception; |
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use OCA\Ocr\Db\OcrJob; |
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use OCA\Ocr\Db\OcrJobMapper; |
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use OCP\IConfig; |
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use OCP\IL10N; |
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use OCP\ILogger; |
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use OCA\Ocr\Constants\OcrConstants; |
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/** |
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* Class RedisService |
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* |
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* @package OCA\Ocr\Service |
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*/ |
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class RedisService { |
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/** |
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* |
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* @var IConfig |
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*/ |
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private $config; |
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/** |
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* |
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* @var OcrJobMapper |
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*/ |
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private $mapper; |
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/** |
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* |
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* @var FileService |
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*/ |
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private $fileService; |
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/** |
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* |
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* @var ILogger |
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*/ |
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private $logger; |
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/** |
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* |
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* @var IL10N |
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*/ |
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private $l10n; |
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/** |
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* |
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* @var string |
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*/ |
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private $redisHost; |
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/** |
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* |
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* @var integer |
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*/ |
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private $redisPort; |
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/** |
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* |
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* @var integer |
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*/ |
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private $redisDb; |
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/** |
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* |
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* @var string |
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*/ |
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private $appName = 'ocr'; |
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/** |
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* QueueService constructor. |
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* |
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* @param OcrJobMapper $mapper |
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* @param FileService $fileService |
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* @param IConfig $config |
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* @param IL10N $l10n |
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* @param ILogger $logger |
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*/ |
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public function __construct(OcrJobMapper $mapper, FileService $fileService, IConfig $config, IL10N $l10n, |
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ILogger $logger) { |
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$this->mapper = $mapper; |
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$this->fileService = $fileService; |
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$this->logger = $logger; |
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$this->l10n = $l10n; |
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$this->config = $config; |
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$this->redisHost = $this->config->getAppValue($this->appName, 'redisHost'); |
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$this->redisPort = intval($this->config->getAppValue($this->appName, 'redisPort')); |
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$this->redisDb = intval($this->config->getAppValue($this->appName, 'redisDb')); |
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} |
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/** |
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* Inits the client and sends the task to the background worker (async) |
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* |
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* @param OcrJob $job |
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* @param string[] $languages |
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* @param string $occDir |
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*/ |
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public function sendJob($job, $languages, $occDir) { |
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try { |
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// check for messaging and put everything together |
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$redis = $this->setupRedisInstance(); |
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$job = $this->mapper->insert($job); |
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$msg = json_encode( |
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array( |
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'id' => $job->getId(), |
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'type' => $job->getType(), |
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'source' => $job->getSource(), |
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'tempFile' => $job->getTempFile(), |
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'languages' => $languages |
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)); |
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if (!$redis->lPush(OcrConstants::REDIS_NEW_JOBS_QUEUE, $msg)) { |
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throw new NotFoundException($this->l10n->t('Could not add files to the redis OCR processing queue.')); |
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} |
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} catch (Exception $e) { |
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$this->fileService->execRemove($job->getTempFile()); |
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$job->setStatus('FAILED'); |
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$job->setErrorLog($this->l10n->t('Could not add files to the redis OCR processing queue.')); |
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$this->mapper->update($job); |
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$this->handleException($e); |
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} |
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} |
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/** |
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* Retrieves all finished jobs from redis and returns them. |
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* |
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* @return string[] |
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*/ |
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public function readingFinishedJobs() { |
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try { |
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$redis = $this->setupRedisInstance(); |
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$result = $redis->multi() |
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->lRange(OcrConstants::REDIS_FINISHED_JOBS_QUEUE, 0, -1) |
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->delete(OcrConstants::REDIS_FINISHED_JOBS_QUEUE) |
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->exec(); |
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$this->logger->debug('Retrieved the following array from redis: {result}', |
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[ |
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'result' => $result[0] |
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]); |
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return $result[0]; |
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} catch (Exception $e) { |
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$this->handleException($e); |
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} |
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} |
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/** |
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* Setup the Redis instance and return to whom ever it needs. |
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* |
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* @throws NotFoundException |
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* @return \Redis |
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*/ |
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private function setupRedisInstance() { |
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View Code Duplication |
if (!extension_loaded('redis')) { |
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$this->logger->debug( |
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'It seems that the message queueing capabilities are not available in your local php installation. Please install php-redis.'); |
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throw new NotFoundException($this->l10n->t('Message queueing capabilities are missing on the server.')); |
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} |
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$redis = new \Redis(); |
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if (!$redis->connect($this->redisHost, $this->redisPort, 2.5, NULL, 100)) { |
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$this->logger->debug('Cannot connect to Redis.'); |
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throw new NotFoundException($this->l10n->t('Cannot connect to Redis.')); |
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} |
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View Code Duplication |
if (!$redis->select($this->redisDb)) { |
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$this->logger->debug('Cannot connect to the right Redis database.'); |
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throw new NotFoundException($this->l10n->t('Cannot connect to the right Redis database.')); |
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} |
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$redis->setOption(\Redis::OPT_PREFIX, OcrConstants::REDIS_KEY_PREFIX); |
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return $redis; |
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} |
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/** |
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* Handle the possible thrown Exceptions from all methods of this class. |
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* |
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* @param Exception $e |
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* @throws Exception |
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* @throws NotFoundException |
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*/ |
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private function handleException($e) { |
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$this->logger->logException($e, [ |
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'message' => 'Exception during message queue processing' |
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]); |
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throw $e; |
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} |
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} |
janis91 /
ocr
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This check looks from parameters that have been defined for a function or method, but which are not used in the method body.