Allow forcing socket type via driver configuration

src/Bolt/ConnectionPool.php

@@ -53,7 +53,7 @@ public static function create(
     ): self {
         return new self(
             $semaphore,
-            BoltFactory::create($conf->getLogger()),
+            BoltFactory::create($conf->getLogger(), $conf->getSocketType()),
             new ConnectionRequestData(
                 $uri->getHost(),
                 $uri,

src/Bolt/SystemWideConnectionFactory.php

@@ -16,6 +16,7 @@
 use function extension_loaded;
 
 use Laudis\Neo4j\Contracts\BasicConnectionFactoryInterface;
+use Laudis\Neo4j\Enum\SocketType;
 
 /**
  * Singleton connection factory based on the installed extensions.
@@ -35,8 +36,17 @@ private function __construct(
     /**
      * @psalm-suppress InvalidNullableReturnType
      */
-    public static function getInstance(): SystemWideConnectionFactory
+    public static function getInstance(?SocketType $preferredSocket = null): SystemWideConnectionFactory
     {
+        // If a specific socket type is requested, create a new instance without caching
+        if ($preferredSocket === SocketType::SOCKETS() && extension_loaded('sockets')) {
+            return new self(new SocketConnectionFactory(new StreamConnectionFactory()));
+        }
+
+        if ($preferredSocket === SocketType::STREAM()) {
+            return new self(new StreamConnectionFactory());
+        }
+
         if (self::$instance === null) {
             $factory = new StreamConnectionFactory();
             if (extension_loaded('sockets')) {

src/BoltFactory.php

@@ -27,6 +27,7 @@
 use Laudis\Neo4j\Databags\SessionConfiguration;
 use Laudis\Neo4j\Databags\TransactionConfiguration;
 use Laudis\Neo4j\Enum\ConnectionProtocol;
+use Laudis\Neo4j\Enum\SocketType;
 
 /**
  * Small wrapper around the bolt library to easily guarantee only bolt version 3 and up will be created and authenticated.
@@ -44,9 +45,9 @@ public function __construct(
     ) {
     }
 
-    public static function create(?Neo4jLogger $logger): self
+    public static function create(?Neo4jLogger $logger, ?SocketType $socketType = null): self
     {
-        return new self(SystemWideConnectionFactory::getInstance(), new ProtocolFactory(), new SslConfigurationFactory(), $logger);
+        return new self(SystemWideConnectionFactory::getInstance($socketType), new ProtocolFactory(), new SslConfigurationFactory(), $logger);
     }
 
     public function createConnection(ConnectionRequestData $data, SessionConfiguration $sessionConfig): BoltConnection

src/Databags/DriverConfiguration.php

@@ -24,6 +24,7 @@
 use Laudis\Neo4j\Common\Neo4jLogger;
 use Laudis\Neo4j\Common\SemaphoreFactory;
 use Laudis\Neo4j\Contracts\SemaphoreFactoryInterface;
+use Laudis\Neo4j\Enum\SocketType;
 use Psr\Log\LoggerInterface;
 use Psr\Log\LogLevel;
 use Psr\SimpleCache\CacheInterface;
@@ -44,11 +45,13 @@ final class DriverConfiguration
     /** @var callable():(SemaphoreFactoryInterface|null)|SemaphoreFactoryInterface|null */
     private $semaphoreFactory;
     private ?Neo4jLogger $logger;
+    private ?SocketType $socketType;
 
     /**
      * @param callable():(CacheInterface|null)|CacheInterface|null                       $cache
      * @param callable():(SemaphoreFactoryInterface|null)|SemaphoreFactoryInterface|null $semaphore
-     * @param string|null                                                                $logLevel  The log level to use. If null, LogLevel::INFO is used.
+     * @param string|null                                                                $logLevel   The log level to use. If null, LogLevel::INFO is used.
+     * @param SocketType|null                                                            $socketType the socket type to use (SocketType::SOCKETS(), SocketType::STREAM(), or null for auto-detect)
      *
      * @psalm-external-mutation-free
      */
@@ -61,6 +64,7 @@ public function __construct(
         callable|SemaphoreFactoryInterface|null $semaphore,
         ?string $logLevel,
         ?LoggerInterface $logger,
+        ?SocketType $socketType = null,
     ) {
         $this->cache = $cache;
         $this->semaphoreFactory = $semaphore;
@@ -69,6 +73,7 @@ public function __construct(
         } else {
             $this->logger = null;
         }
+        $this->socketType = $socketType;
     }
 
     /**
@@ -83,6 +88,7 @@ public static function create(
         SemaphoreFactoryInterface $semaphore,
         ?string $logLevel,
         ?LoggerInterface $logger,
+        ?SocketType $socketType = null,
     ): self {
         return new self(
             $userAgent,
@@ -92,7 +98,8 @@ public static function create(
             $acquireConnectionTimeout,
             $semaphore,
             $logLevel,
-            $logger
+            $logger,
+            $socketType
         );
     }
 
@@ -261,4 +268,23 @@ public function withLogger(?string $logLevel, ?LoggerInterface $logger): self
 
         return $tbr;
     }
+
+    /**
+     * @psalm-immutable
+     */
+    public function getSocketType(): ?SocketType
+    {
+        return $this->socketType;
+    }
+
+    /**
+     * @psalm-immutable
+     */
+    public function withSocketType(?SocketType $socketType): self
+    {
+        $tbr = clone $this;
+        $tbr->socketType = $socketType;
+
+        return $tbr;
+    }
 }

src/Enum/SocketType.php

@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the Neo4j PHP Client and Driver package.
+ *
+ * (c) Nagels <https://nagels.tech>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Laudis\Neo4j\Enum;
+
+use JsonSerializable;
+use Laudis\TypedEnum\TypedEnum;
+
+/**
+ * Defines the socket type to use for connections.
+ *
+ * @method static self SOCKETS()
+ * @method static self STREAM()
+ *
+ * @extends TypedEnum<string>
+ *
+ * @psalm-immutable
+ *
+ * @psalm-suppress MutableDependency
+ */
+final class SocketType extends TypedEnum implements JsonSerializable
+{
+    private const SOCKETS = 'sockets';
+    private const STREAM = 'stream';
+
+    public function jsonSerialize(): string
+    {
+        return $this->getValue();
+    }
+}

tests/Unit/BoltFactoryTest.php

@@ -20,13 +20,16 @@
 use Laudis\Neo4j\Bolt\Connection;
 use Laudis\Neo4j\Bolt\ProtocolFactory;
 use Laudis\Neo4j\Bolt\SslConfigurationFactory;
+use Laudis\Neo4j\Bolt\SystemWideConnectionFactory;
 use Laudis\Neo4j\BoltFactory;
 use Laudis\Neo4j\Common\Uri;
 use Laudis\Neo4j\Contracts\AuthenticateInterface;
 use Laudis\Neo4j\Contracts\BasicConnectionFactoryInterface;
 use Laudis\Neo4j\Databags\ConnectionRequestData;
+use Laudis\Neo4j\Databags\DriverConfiguration;
 use Laudis\Neo4j\Databags\SessionConfiguration;
 use Laudis\Neo4j\Databags\SslConfiguration;
+use Laudis\Neo4j\Enum\SocketType;
 use PHPUnit\Framework\TestCase;
 
 final class BoltFactoryTest extends TestCase
@@ -73,4 +76,35 @@ public function testCreateBasic(): void
         self::assertInstanceOf(Connection::class,
             $connection->getImplementation()[1]);
     }
+
+    public function testSystemWideConnectionFactoryStreamOverride(): void
+    {
+        $factory = SystemWideConnectionFactory::getInstance(SocketType::STREAM());
+        self::assertInstanceOf(SystemWideConnectionFactory::class, $factory);
+    }
+
+    public function testSystemWideConnectionFactorySocketOverride(): void
+    {
+        if (!extension_loaded('sockets')) {
+            self::markTestSkipped('sockets extension not loaded');
+        }
+
+        $factory = SystemWideConnectionFactory::getInstance(SocketType::SOCKETS());
+        self::assertInstanceOf(SystemWideConnectionFactory::class, $factory);
+    }
+
+    public function testDriverConfigurationWithSocketType(): void
+    {
+        $socketType = SocketType::STREAM();
+        $config = DriverConfiguration::default()
+            ->withSocketType($socketType);
+
+        self::assertEquals($socketType, $config->getSocketType());
+    }
+
+    public function testBoltFactoryWithSocketTypeOverride(): void
+    {
+        $factory = BoltFactory::create(null, SocketType::STREAM());
+        self::assertInstanceOf(BoltFactory::class, $factory);
+    }
 }