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78 lines
2.0 KiB
78 lines
2.0 KiB
<?php |
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declare(strict_types=1); |
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/** |
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* @copyright 2019 Christoph Wurst <christoph@winzerhof-wurst.at> |
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* |
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* @author 2019 Christoph Wurst <christoph@winzerhof-wurst.at> |
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* |
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* @license GNU AGPL version 3 or any later version |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License as |
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* published by the Free Software Foundation, either version 3 of the |
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* License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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namespace OC\EventDispatcher; |
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use OCP\AppFramework\QueryException; |
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use OCP\EventDispatcher\Event; |
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use OCP\EventDispatcher\IEventListener; |
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use OCP\IContainer; |
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use OCP\ILogger; |
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/** |
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* Lazy service event listener |
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* |
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* Makes it possible to lazy-route a dispatched event to a service instance |
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* created by the service container |
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*/ |
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final class ServiceEventListener { |
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/** @var IContainer */ |
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private $container; |
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/** @var string */ |
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private $class; |
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/** @var ILogger */ |
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private $logger; |
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/** @var null|IEventListener */ |
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private $service; |
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public function __construct(IContainer $container, |
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string $class, |
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ILogger $logger) { |
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$this->container = $container; |
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$this->class = $class; |
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$this->logger = $logger; |
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} |
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public function __invoke(Event $event) { |
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if ($this->service === null) { |
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try { |
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$this->service = $this->container->query($this->class); |
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} catch (QueryException $e) { |
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$this->logger->logException($e, [ |
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'level' => ILogger::ERROR, |
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'message' => "Could not load event listener service " . $this->class, |
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]); |
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return; |
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} |
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} |
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$this->service->handle($event); |
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} |
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}
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