[WIP] ping/close connection middleware services

DependencyInjection/DoctrineExtension.php

@@ -11,6 +11,8 @@
 use Doctrine\ORM\Version;
 use LogicException;
 use Symfony\Bridge\Doctrine\DependencyInjection\AbstractDoctrineExtension;
+use Symfony\Bridge\Doctrine\Messenger\DoctrineCloseConnectionMiddleware;
+use Symfony\Bridge\Doctrine\Messenger\DoctrinePingConnectionMiddleware;
 use Symfony\Bridge\Doctrine\Messenger\DoctrineTransactionMiddleware;
 use Symfony\Bridge\Doctrine\PropertyInfo\DoctrineExtractor;
 use Symfony\Bridge\Doctrine\Validator\DoctrineLoader;
@@ -849,6 +851,14 @@ private function loadMessengerServices(ContainerBuilder $container) : void
         $loader = new XmlFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
         $loader->load('messenger.xml');
 
+        if (class_exists(DoctrineCloseConnectionMiddleware::class)) {
+            $loader->load('messenger/doctrine-close-connection-middleware.xml');
+        }
+
+        if (class_exists(DoctrinePingConnectionMiddleware::class)) {
+            $loader->load('messenger/doctrine-ping-connection-middleware.xml');
+        }
+
         if (! class_exists(DoctrineTransportFactory::class)) {
             return;
         }

Resources/config/messenger/doctrine-ping-close-middleware.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" ?>
+
+<container xmlns="http://symfony.com/schema/dic/services"
+           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+           xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
+    <services>
+        <!--
+        The following service isn't prefixed by the "doctrine.orm" namespace in order for end-users to just use
+        the "doctrine_close_connection" shortcut in message buses middleware config
+        -->
+
+        <service id="messenger.middleware.doctrine_close_connection" class="Symfony\Bridge\Doctrine\Messenger\DoctrineCloseConnectionMiddleware" abstract="true" public="false">
+            <argument type="service" id="doctrine" />
+        </service>
+    </services>
+</container>

Resources/config/messenger/doctrine-ping-connection-middleware.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" ?>
+
+<container xmlns="http://symfony.com/schema/dic/services"
+           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+           xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
+    <services>
+        <!--
+        The following service isn't prefixed by the "doctrine.orm" namespace in order for end-users to just use
+        the "doctrine_ping_connection" shortcut in message buses middleware config
+        -->
+        <service id="messenger.middleware.doctrine_ping_connection" class="Symfony\Bridge\Doctrine\Messenger\DoctrinePingConnectionMiddleware" abstract="true" public="false">
+            <argument type="service" id="doctrine" />
+        </service>
+    </services>
+</container>