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Actual exam question for Adobe's AD0-E725 exam Question #: 49 Topic #: 3
An Adobe Commerce Developer creates a before plugin for the save() method from the Magento\Framework\App\Cache\Proxy class to manipulate cache identifiers and data before it is saved to the cache storage. An example of the class code is shown below: namespace Magento\Framework\App\Cache; use Magento\Framework\App\Cache\CacheInterface; use Magento\Framework\ObjectManager\NoninterceptableInterface; class Proxy implements CacheInterface, NoninterceptableInterface { ... public function save($data, $identifier, $tags = [], $lifeTime = null) { return $this->getCache()->save($data, $identifier, $tags, $lifeTime); } ... } Why is the plugin not working as expected?
Comprehensive and Detailed Explanation (with official references): The correct answer is A. The plugin cannot be created for this class. The reason is that Magento\Framework\App\Cache\Proxy implements the NoninterceptableInterface. * Any class that implements the NoninterceptableInterface in Magento is excluded from the plugin system. * This means no before, after, or around plugins can be applied to methods of such classes. * Magento uses this mechanism to protect critical classes (like Proxy classes, Factories, and other infrastructure code) from being intercepted, as doing so could introduce performance or stability issues. Therefore, the developer's plugin for the save() method does not work, because plugins are not allowed on this class by design. Options B and C are incorrect because: * Another plugin (after/around) does not block the execution in this case; the class itself is simply non- interceptable. Official Documentation Extracts: * "Plugins cannot be applied to final classes, final methods, non-public methods, or classes that implement Magento\Framework\ObjectManager\NoninterceptableInterface."- Adobe Commerce DevDocs: Plugins limitations * "Classes implementing NoninterceptableInterface cannot be intercepted. This interface is used to mark classes that must not be extended through the plugin mechanism."- Magento Framework Reference: NoninterceptableInterface
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