LYNX-199: Eliminate double place order locking

Author: sivaschenko

app/code/Magento/QuoteGraphQl/Model/Cart/PlaceOrderMutex.php

@@ -7,7 +7,6 @@
 
 namespace Magento\QuoteGraphQl\Model\Resolver;
 
-use Magento\Framework\App\ObjectManager;
 use Magento\Framework\Exception\LocalizedException;
 use Magento\Framework\GraphQl\Config\Element\Field;
 use Magento\Framework\GraphQl\Exception\GraphQlInputException;
@@ -17,7 +16,6 @@
 use Magento\QuoteGraphQl\Model\Cart\GetCartForCheckout;
 use Magento\GraphQl\Model\Query\ContextInterface;
 use Magento\QuoteGraphQl\Model\Cart\PlaceOrder as PlaceOrderModel;
-use Magento\QuoteGraphQl\Model\Cart\PlaceOrderMutexInterface;
 use Magento\Sales\Api\OrderRepositoryInterface;
 
 /**
@@ -45,30 +43,22 @@ class PlaceOrder implements ResolverInterface
      */
     private $errorMessageFormatter;
 
-    /**
-     * @var PlaceOrderMutexInterface
-     */
-    private $placeOrderMutex;
-
     /**
      * @param GetCartForCheckout $getCartForCheckout
      * @param PlaceOrderModel $placeOrder
      * @param OrderRepositoryInterface $orderRepository
      * @param AggregateExceptionMessageFormatter $errorMessageFormatter
-     * @param PlaceOrderMutexInterface|null $placeOrderMutex
      */
     public function __construct(
         GetCartForCheckout $getCartForCheckout,
         PlaceOrderModel $placeOrder,
         OrderRepositoryInterface $orderRepository,
-        AggregateExceptionMessageFormatter $errorMessageFormatter,
-        ?PlaceOrderMutexInterface $placeOrderMutex = null
+        AggregateExceptionMessageFormatter $errorMessageFormatter
     ) {
         $this->getCartForCheckout = $getCartForCheckout;
         $this->placeOrder = $placeOrder;
         $this->orderRepository = $orderRepository;
         $this->errorMessageFormatter = $errorMessageFormatter;
-        $this->placeOrderMutex = $placeOrderMutex ?: ObjectManager::getInstance()->get(PlaceOrderMutexInterface::class);
     }
 
     /**
@@ -80,25 +70,6 @@ public function resolve(Field $field, $context, ResolveInfo $info, array $value
             throw new GraphQlInputException(__('Required parameter "cart_id" is missing'));
         }
 
-        return $this->placeOrderMutex->execute(
-            $args['input']['cart_id'],
-            \Closure::fromCallable([$this, 'run']),
-            [$field, $context, $info, $args]
-        );
-    }
-
-    /**
-     * Run the resolver.
-     *
-     * @param Field $field
-     * @param ContextInterface $context
-     * @param ResolveInfo $info
-     * @param array|null $args
-     * @return array[]
-     * @SuppressWarnings(PHPMD.UnusedPrivateMethod)
-     */
-    private function run(Field $field, ContextInterface $context, ResolveInfo $info, ?array $args): array
-    {
         $maskedCartId = $args['input']['cart_id'];
         $userId = (int)$context->getUserId();
         $storeId = (int)$context->getExtensionAttributes()->getStore()->getId();

app/code/Magento/QuoteGraphQl/Model/Cart/PlaceOrderMutexInterface.php

@@ -9,7 +9,6 @@
     <preference for="Magento\QuoteGraphQl\Model\CartItem\DataProvider\CustomizableOptionValueInterface" type="Magento\QuoteGraphQl\Model\CartItem\DataProvider\CustomizableOptionValue\Composite" />
     <preference for="Magento\QuoteGraphQl\Model\CartItem\DataProvider\Processor\ItemDataProcessorInterface" type="Magento\QuoteGraphQl\Model\CartItem\DataProvider\Processor\ItemDataCompositeProcessor" />
     <preference for="Magento\QuoteGraphQl\Model\CartItem\PrecursorInterface" type="Magento\QuoteGraphQl\Model\CartItem\PrecursorComposite" />
-    <preference for="Magento\QuoteGraphQl\Model\Cart\PlaceOrderMutexInterface" type="Magento\QuoteGraphQl\Model\Cart\PlaceOrderMutex" />
     <type name="Magento\QuoteGraphQl\Model\Resolver\CartItemTypeResolver">
         <arguments>
             <argument name="supportedTypes" xsi:type="array">