update

projects/priceservice/vendor/symfony/messenger/MessageBus.php

@@ -0,0 +1,72 @@
+<?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\Component\Messenger;
+
+use Symfony\Component\Messenger\Middleware\MiddlewareInterface;
+use Symfony\Component\Messenger\Middleware\StackMiddleware;
+
+/**
+ * @author Samuel Roze <samuel.roze@gmail.com>
+ * @author Matthias Noback <matthiasnoback@gmail.com>
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class MessageBus implements MessageBusInterface
+{
+    private \IteratorAggregate $middlewareAggregate;
+
+    /**
+     * @param iterable<mixed, MiddlewareInterface> $middlewareHandlers
+     */
+    public function __construct(iterable $middlewareHandlers = [])
+    {
+        if ($middlewareHandlers instanceof \IteratorAggregate) {
+            $this->middlewareAggregate = $middlewareHandlers;
+        } elseif (\is_array($middlewareHandlers)) {
+            $this->middlewareAggregate = new \ArrayObject($middlewareHandlers);
+        } else {
+            // $this->middlewareAggregate should be an instance of IteratorAggregate.
+            // When $middlewareHandlers is an Iterator, we wrap it to ensure it is lazy-loaded and can be rewound.
+            $this->middlewareAggregate = new class($middlewareHandlers) implements \IteratorAggregate {
+                private \Traversable $middlewareHandlers;
+                private \ArrayObject $cachedIterator;
+
+                public function __construct(\Traversable $middlewareHandlers)
+                {
+                    $this->middlewareHandlers = $middlewareHandlers;
+                }
+
+                public function getIterator(): \Traversable
+                {
+                    return $this->cachedIterator ??= new \ArrayObject(iterator_to_array($this->middlewareHandlers, false));
+                }
+            };
+        }
+    }
+
+    public function dispatch(object $message, array $stamps = []): Envelope
+    {
+        $envelope = Envelope::wrap($message, $stamps);
+        $middlewareIterator = $this->middlewareAggregate->getIterator();
+
+        while ($middlewareIterator instanceof \IteratorAggregate) {
+            $middlewareIterator = $middlewareIterator->getIterator();
+        }
+        $middlewareIterator->rewind();
+
+        if (!$middlewareIterator->valid()) {
+            return $envelope;
+        }
+        $stack = new StackMiddleware($middlewareIterator);
+
+        return $middlewareIterator->current()->handle($envelope, $stack);
+    }
+}