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application/Espo/Core/WebSocket/SubscriberFactory.php

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+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\WebSocket;
+
+use Espo\Core\InjectableFactory;
+use Espo\Core\Utils\Metadata;
+use Espo\Core\Binding\Factory;
+
+use RuntimeException;
+
+/**
+ * @implements Factory<Subscriber>
+ */
+class SubscriberFactory implements Factory
+{
+    private const DEFAULT_MESSAGER = 'ZeroMQ';
+
+    public function __construct(
+        private InjectableFactory $injectableFactory,
+        private ConfigDataProvider $config,
+        private Metadata $metadata,
+    ) {}
+
+    public function create(): Subscriber
+    {
+        $messager = $this->config->getMessager() ?? self::DEFAULT_MESSAGER;
+
+        /** @var ?class-string<Subscriber> $className */
+        $className = $this->metadata->get(['app', 'webSocket', 'messagers', $messager, 'subscriberClassName']);
+
+        if (!$className) {
+            throw new RuntimeException("No subscriber for messager '$messager'.");
+        }
+
+        return $this->injectableFactory->create($className);
+    }
+}