B2B-2658: Implement GraphQL Resolver Cache for Customer query

Author: joanhe

app/code/Magento/GraphQlResolverCache/Model/Resolver/Result/HydratorDehydratorProvider.php

@@ -7,6 +7,7 @@
 
 namespace Magento\GraphQlResolverCache\Model\Resolver\Result;
 
+use Magento\Framework\Exception\ConfigurationMismatchException;
 use Magento\Framework\GraphQl\Query\ResolverInterface;
 use Magento\Framework\ObjectManagerInterface;
 
@@ -64,7 +65,11 @@ public function getDehydratorForResolver(ResolverInterface $resolver): ?Dehydrat
         if (array_key_exists($resolverClass, $this->dehydratorInstances)) {
             return $this->dehydratorInstances[$resolverClass];
         }
-        $resolverDehydrators = $this->getInstancesForResolver($resolver, $this->dehydratorConfig);
+        $resolverDehydrators = $this->getInstancesForResolver(
+            $resolver,
+            $this->dehydratorConfig,
+            DehydratorInterface::class
+        );
         if (empty($resolverDehydrators)) {
             $this->dehydratorInstances[$resolverClass] = null;
         } else {
@@ -87,7 +92,11 @@ public function getHydratorForResolver(ResolverInterface $resolver): ?HydratorIn
         if (array_key_exists($resolverClass, $this->hydratorInstances)) {
             return $this->hydratorInstances[$resolverClass];
         }
-        $resolverHydrators = $this->getInstancesForResolver($resolver, $this->hydratorConfig);
+        $resolverHydrators = $this->getInstancesForResolver(
+            $resolver,
+            $this->hydratorConfig,
+            HydratorInterface::class
+        );
         if (empty($resolverHydrators)) {
             $this->hydratorInstances[$resolverClass] = null;
         } else {
@@ -117,10 +126,15 @@ private function getResolverClass(ResolverInterface $resolver): string
      *
      * @param ResolverInterface $resolver
      * @param array $classesConfig
+     * @param string $interfaceName
      * @return array
+     * @throws ConfigurationMismatchException
      */
-    private function getInstancesForResolver(ResolverInterface $resolver, array $classesConfig): array
-    {
+    private function getInstancesForResolver(
+        ResolverInterface $resolver,
+        array $classesConfig,
+        string $interfaceName
+    ): array {
         $resolverClassesConfig = [];
         foreach ($this->getResolverClassChain($resolver) as $resolverClass) {
             if (isset($classesConfig[$resolverClass])) {
@@ -141,7 +155,13 @@ private function getInstancesForResolver(ResolverInterface $resolver, array $cla
         });
         $dataProcessingInstances = [];
         foreach ($dataProcessingClassList as $classData) {
-            $dataProcessingInstances[] = $this->objectManager->get($classData['class']);
+            if (is_a($classData['class'], $interfaceName, true)) {
+                $dataProcessingInstances[] = $this->objectManager->get($classData['class']);
+            } else {
+                throw new ConfigurationMismatchException(
+                    __('%1 should implement %2', $classData['class'], $interfaceName)
+                );
+            }
         }
         return $dataProcessingInstances;
     }