[DoctrineBridge] doctrine connection listener for long running runtime

alli83 · alli83 · commit 3ec9cd7b4127 · 2023-12-27T16:14:57.000+11:00
diff --git a/src/Symfony/Bridge/Doctrine/Event/ForceKernelRebootEvent.php b/src/Symfony/Bridge/Doctrine/Event/ForceKernelRebootEvent.php
@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bridge\Doctrine\Event;
+
+use Symfony\Contracts\EventDispatcher\Event;
+
+final class ForceKernelRebootEvent extends Event
+{
+    public function __construct(private string $reason)
+    {
+    }
+
+    public function getReason(): string
+    {
+        return $this->reason;
+    }
+}
diff --git a/src/Symfony/Bridge/Doctrine/Listener/DoctrineConnectionSubscriber.php b/src/Symfony/Bridge/Doctrine/Listener/DoctrineConnectionSubscriber.php
@@ -0,0 +1,100 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bridge\Doctrine\Listener;
+
+use Doctrine\DBAL\Connection;
+use Doctrine\DBAL\Exception as DBALException;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\Persistence\ManagerRegistry;
+use ProxyManager\Proxy\LazyLoadingInterface;
+use Symfony\Bridge\Doctrine\Event\ForceKernelRebootEvent;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpKernel\Event\RequestEvent;
+use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\VarExporter\LazyObjectInterface;
+
+/**
+ * Based on https://github.com/Baldinof/roadrunner-bundle/blob/3.x/src/Integration/Doctrine/DoctrineORMMiddleware.php.
+ */
+class DoctrineConnectionSubscriber implements EventSubscriberInterface
+{
+    public function __construct(private ManagerRegistry $managerRegistry, private ContainerInterface $container, private EventDispatcherInterface $eventDispatcher)
+    {
+    }
+
+    public function onKernelRequest(RequestEvent $event)
+    {
+        $connectionServices = $this->managerRegistry->getConnectionNames();
+
+        foreach ($connectionServices as $connectionServiceName) {
+            if (!$this->container->initialized($connectionServiceName)) {
+                continue;
+            }
+
+            $connection = $this->container->get($connectionServiceName);
+
+            if (!$connection instanceof Connection) {
+                throw new \RuntimeException(sprintf('The value "%s" is not an instance of "%s".', $connection, Connection::class));
+            }
+
+            if ($connection->isConnected() && !$this->ping($connection)) {
+                $connection->close();
+            }
+
+            $managerNames = $this->managerRegistry->getManagerNames();
+
+            foreach ($managerNames as $managerName) {
+                if (!$this->container->initialized($managerName)) {
+                    continue;
+                }
+
+                $manager = $this->container->get($managerName);
+
+                if (!$manager instanceof EntityManagerInterface) {
+                    throw new \RuntimeException(sprintf('The value "%s" not an instance of "%s".', $manager, EntityManagerInterface::class));
+                }
+
+                if ($manager instanceof LazyLoadingInterface || $manager instanceof LazyObjectInterface) {
+                    continue; // Doctrine bundle will handle manager reset on next request
+                }
+
+                if (!$manager->isOpen()) {
+                    $this->eventDispatcher->dispatch(new ForceKernelRebootEvent(
+                        sprintf('Entity manager "%s" is closed and the package `symfony/proxy-manager-bridge` is not installed so kernel reset will not re-open it', $managerName)
+                    ));
+
+                    return;
+                }
+            }
+        }
+    }
+
+    private function ping(Connection $con): bool
+    {
+        try {
+            $con->executeQuery($con->getDatabasePlatform()->getDummySelectSQL());
+
+            return true;
+        } catch (DBALException $e) {
+            return false;
+        }
+    }
+
+    public static function getSubscribedEvents(): array
+    {
+        return [
+            KernelEvents::REQUEST => 'onKernelRequest',
+        ];
+    }
+}
