[DoctrineBridge] Idle connection listener for long running runtime

Author: alli83

CHANGELOG.md

@@ -6,6 +6,7 @@ CHANGELOG
 
  * Deprecate the `DoctrineExtractor::getTypes()` method, use `DoctrineExtractor::getType()` instead
  * Allow `EntityValueResolver` to return a list of entities
+ * Add support for auto-closing idle connections
 
 7.0
 ---

Middleware/IdleConnection/Driver.php

@@ -0,0 +1,37 @@
+<?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\Middleware\IdleConnection;
+
+use Doctrine\DBAL\Driver as DriverInterface;
+use Doctrine\DBAL\Driver\Connection as ConnectionInterface;
+use Doctrine\DBAL\Driver\Middleware\AbstractDriverMiddleware;
+
+final class Driver extends AbstractDriverMiddleware
+{
+    public function __construct(
+        DriverInterface $driver,
+        private \ArrayObject $connectionExpiries,
+        private readonly int $ttl,
+        private readonly string $connectionName,
+    ) {
+        parent::__construct($driver);
+    }
+
+    public function connect(array $params): ConnectionInterface
+    {
+        $timestamp = time();
+        $connection = parent::connect($params);
+        $this->connectionExpiries[$this->connectionName] = $timestamp + $this->ttl;
+
+        return $connection;
+    }
+}

Middleware/IdleConnection/Listener.php

@@ -0,0 +1,55 @@
+<?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\Middleware\IdleConnection;
+
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpKernel\Event\RequestEvent;
+use Symfony\Component\HttpKernel\KernelEvents;
+
+final class Listener implements EventSubscriberInterface
+{
+    /**
+     * @param \ArrayObject<string, int> $connectionExpiries
+     */
+    public function __construct(
+        private readonly \ArrayObject $connectionExpiries,
+        private ContainerInterface $container,
+    ) {
+    }
+
+    public function onKernelRequest(RequestEvent $event): void
+    {
+        $timestamp = time();
+
+        foreach ($this->connectionExpiries as $name => $expiry) {
+            if ($timestamp >= $expiry) {
+                // unset before so that we won't retry in case of any failure
+                $this->connectionExpiries->offsetUnset($name);
+
+                try {
+                    $connection = $this->container->get("doctrine.dbal.{$name}_connection");
+                    $connection->close();
+                } catch (\Exception) {
+                    // ignore exceptions to remain fail-safe
+                }
+            }
+        }
+    }
+
+    public static function getSubscribedEvents(): array
+    {
+        return [
+            KernelEvents::REQUEST => 'onKernelRequest',
+        ];
+    }
+}

Tests/Middleware/IdleConnection/DriverTest.php

@@ -0,0 +1,42 @@
+<?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\Tests\Middleware\IdleConnection;
+
+use Doctrine\DBAL\Driver as DriverInterface;
+use Doctrine\DBAL\Driver\Connection as ConnectionInterface;
+use PHPUnit\Framework\TestCase;
+use Symfony\Bridge\Doctrine\Middleware\IdleConnection\Driver;
+
+class DriverTest extends TestCase
+{
+    /**
+     * @group time-sensitive
+     */
+    public function testConnect()
+    {
+        $driverMock = $this->createMock(DriverInterface::class);
+        $connectionMock = $this->createMock(ConnectionInterface::class);
+
+        $driverMock->expects($this->once())
+            ->method('connect')
+            ->willReturn($connectionMock);
+
+        $connectionExpiries = new \ArrayObject();
+
+        $driver = new Driver($driverMock, $connectionExpiries, 60, 'default');
+        $connection = $driver->connect([]);
+
+        $this->assertSame($connectionMock, $connection);
+        $this->assertArrayHasKey('default', $connectionExpiries);
+        $this->assertSame(time() + 60, $connectionExpiries['default']);
+    }
+}

Tests/Middleware/IdleConnection/ListenerTest.php

@@ -0,0 +1,43 @@
+<?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 Middleware\IdleConnection;
+
+use Doctrine\DBAL\Connection as ConnectionInterface;
+use PHPUnit\Framework\TestCase;
+use Symfony\Bridge\Doctrine\Middleware\IdleConnection\Listener;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpKernel\Event\RequestEvent;
+
+class ListenerTest extends TestCase
+{
+    public function testOnKernelRequest()
+    {
+        $containerMock = $this->createMock(ContainerInterface::class);
+        $connectionExpiries = new \ArrayObject(['connectionone' => time() - 30, 'connectiontwo' => time() + 40]);
+
+        $connectionOneMock = $this->getMockBuilder(ConnectionInterface::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $containerMock->expects($this->exactly(1))
+            ->method('get')
+            ->with('doctrine.dbal.connectionone_connection')
+            ->willReturn($connectionOneMock);
+
+        $listener = new Listener($connectionExpiries, $containerMock);
+
+        $listener->onKernelRequest($this->createMock(RequestEvent::class));
+
+        $this->assertArrayNotHasKey('connectionone', (array) $connectionExpiries);
+        $this->assertArrayHasKey('connectiontwo', (array) $connectionExpiries);
+    }
+}

phpunit.xml.dist

@@ -33,7 +33,12 @@
         <listener class="Symfony\Bridge\PhpUnit\SymfonyTestsListener">
             <arguments>
                 <array>
-                    <element key="time-sensitive"><string>Symfony\Bridge\Doctrine\Middleware\Debug</string></element>
+                    <element key="time-sensitive">
+                        <array>
+                            <element key="0"><string>Symfony\Bridge\Doctrine\Middleware\Debug</string></element>
+                            <element key="1"><string>Symfony\Bridge\Doctrine\Middleware\Debug</string></element>
+                        </array>
+                    </element>
                 </array>
             </arguments>
         </listener>