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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\CacheInvalidate\Observer;
use Magento\Framework\Event\ObserverInterface;
class InvalidateVarnishObserver implements ObserverInterface
{
/**
* Application config object
*
* @var \Magento\Framework\App\Config\ScopeConfigInterface
*/
protected $config;
/**
* @var \Magento\CacheInvalidate\Model\PurgeCache
*/
protected $purgeCache;
/**
* Invalidation tags resolver
*
* @var \Magento\Framework\App\Cache\Tag\Resolver
*/
private $tagResolver;
/**
* @param \Magento\PageCache\Model\Config $config
* @param \Magento\CacheInvalidate\Model\PurgeCache $purgeCache
*/
public function __construct(
\Magento\PageCache\Model\Config $config,
\Magento\CacheInvalidate\Model\PurgeCache $purgeCache
) {
$this->config = $config;
$this->purgeCache = $purgeCache;
}
/**
* If Varnish caching is enabled it collects array of tags
* of incoming object and asks to clean cache.
*
* @param \Magento\Framework\Event\Observer $observer
* @return void
*/
public function execute(\Magento\Framework\Event\Observer $observer)
{
$object = $observer->getEvent()->getObject();
if (!is_object($object)) {
return;
}
if ($this->config->getType() == \Magento\PageCache\Model\Config::VARNISH && $this->config->isEnabled()) {
$bareTags = $this->getTagResolver()->getTags($object);
$tags = [];
$pattern = "((^|,)%s(,|$))";
foreach ($bareTags as $tag) {
$tags[] = sprintf($pattern, $tag);
}
if (!empty($tags)) {
$this->purgeCache->sendPurgeRequest(implode('|', array_unique($tags)));
}
}
}
/**
* @deprecated 100.1.2
* @return \Magento\Framework\App\Cache\Tag\Resolver
*/
private function getTagResolver()
{
if ($this->tagResolver === null) {
$this->tagResolver = \Magento\Framework\App\ObjectManager::getInstance()
->get(\Magento\Framework\App\Cache\Tag\Resolver::class);
}
return $this->tagResolver;
}
}