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<?php |
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namespace Victoire\Bundle\ViewReferenceBundle\Cache; |
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use Doctrine\ORM\EntityManager; |
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use Victoire\Bundle\CoreBundle\Helper\ViewHelper; |
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use Victoire\Bundle\ViewReferenceBundle\Cache\Xml\ViewReferenceXmlCacheDriver; |
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use Victoire\Bundle\ViewReferenceBundle\Cache\Xml\ViewReferenceXmlCacheManager; |
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/** |
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* Called (for example on kernel request) to create the viewsReference cache file |
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* ref. victoire_view_reference.cache_warmer. |
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*/ |
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class ViewCacheWarmer |
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{ |
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private $viewHelper; |
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private $viewCacheDriver; |
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private $viewCacheManager; |
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/** |
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* @param ViewHelper $viewHelper @victoire_page.page_helper |
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* @param ViewReferenceXmlCacheDriver $viewCacheDriver @victoire_view_reference.cache.driver |
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* @param ViewReferenceXmlCacheManager $viewCacheManager @victoire_view_reference.cache.manager |
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*/ |
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public function __construct( |
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ViewHelper $viewHelper, |
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ViewReferenceXmlCacheDriver $viewCacheDriver, |
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ViewReferenceXmlCacheManager $viewCacheManager, |
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EntityManager $entityManager |
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) { |
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$this->viewHelper = $viewHelper; |
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$this->viewCacheDriver = $viewCacheDriver; |
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$this->viewCacheManager = $viewCacheManager; |
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$this->entityManager = $entityManager; |
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} |
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/** |
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* Warm the view cache file (if needed or force mode). |
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* |
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* @param string $cacheDir Where does the viewsReferences file should take place |
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*/ |
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public function warmUp($cacheDir) |
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{ |
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if (!$this->viewCacheDriver->fileExists()) { |
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$this->viewCacheDriver->writeFile( |
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$this->viewCacheManager->generateXml( |
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$this->viewHelper->buildViewsReferences() |
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) |
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); |
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} |
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} |
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} |
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The
EntityManagermight become unusable for example if a transaction is rolled back and it gets closed. Let’s assume that somewhere in your application, or in a third-party library, there is code such as the following:If that code throws an exception and the
EntityManageris closed. Any other code which depends on the same instance of theEntityManagerduring this request will fail.On the other hand, if you instead inject the
ManagerRegistry, thegetManager()method guarantees that you will always get a usable manager instance.