[QUEUE] Add queueing wrapper, default configuration and example usage

.env

@@ -34,3 +34,10 @@ DATABASE_URL=postgresql://postgres:foobar@postgres:5432/social
 ###< doctrine/doctrine-bundle ###
 
 SHELL_VERBOSITY=3
+###> symfony/messenger ###
+# Choose one of the transports below
+# MESSENGER_TRANSPORT_DSN=amqp://guest:guest@localhost:5672/%2f/messages
+MESSENGER_TRANSPORT_DSN_HIGH=doctrine://default?queue_name=high
+MESSENGER_TRANSPORT_DSN_LOW=doctrine://default?queue_name=low
+# MESSENGER_TRANSPORT_DSN=redis://localhost:6379/messages
+###< symfony/messenger ###

config/packages/messenger.yaml

@@ -0,0 +1,11 @@
+framework:
+    messenger:
+        failure_transport: failed
+        transports:
+            failed: 'doctrine://default?queue_name=failed'
+            high: '%env(MESSENGER_TRANSPORT_DSN_HIGH)%'
+            low: '%env(MESSENGER_TRANSPORT_DSN_LOW)%'
+
+        routing:
+            'App\Core\Queue\MessageHigh': high
+            'App\Core\Queue\MessageLow': low

config/services.yaml

@@ -36,3 +36,6 @@ services:
     App\Core\I18n\TransExtractor:
         tags:
             - { name: translation.extractor, alias: social }
+
+    App\Core\Queue\MessageHandler:
+      tags: [messenger.message_handler]

src/Controller/NetworkPublic.php

@@ -31,6 +31,7 @@
 namespace App\Controller;
 
 use App\Core\Controller;
+use App\Core\Queue\Queue;
 
 class NetworkPublic extends Controller
 {
@@ -41,6 +42,8 @@ class NetworkPublic extends Controller
 
     public function handle()
     {
+        Queue::enqueue('Yo, test', 'network_public');
+
         return [
             '_template' => 'network/public.html.twig',
             'notices'   => ['some notice', 'some other notice', 'some other more diferent notice'],

src/Core/GNUsocial.php

@@ -43,6 +43,7 @@ namespace App\Core;
 use App\Core\DB\DB;
 use App\Core\DB\DefaultSettings;
 use App\Core\I18n\I18nHelper;
+use App\Core\Queue\Queue;
 use App\Core\Router\Router;
 use Doctrine\ORM\EntityManagerInterface;
 use Psr\Log\LoggerInterface;
@@ -52,6 +53,7 @@ use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 use Symfony\Component\Form\FormFactoryInterface;
 use Symfony\Component\HttpKernel\Event\RequestEvent;
 use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\Messenger\MessageBusInterface;
 use Symfony\Component\Routing\RouterInterface;
 use Symfony\Contracts\Translation\TranslatorInterface;
 
@@ -62,6 +64,7 @@ class GNUsocial implements EventSubscriberInterface
     protected EntityManagerInterface $entity_manager;
     protected RouterInterface        $router;
     protected FormFactoryInterface   $form_factory;
+    protected MessageBusInterface    $message_bus;
 
     /**
      * Symfony dependency injection gives us access to these services
@@ -70,13 +73,15 @@ class GNUsocial implements EventSubscriberInterface
                                 TranslatorInterface $translator,
                                 EntityManagerInterface $em,
                                 RouterInterface $router,
-                                FormFactoryInterface $ff)
+                                FormFactoryInterface $ff,
+                                MessageBusInterface $message_bus)
     {
         $this->logger         = $logger;
         $this->translator     = $translator;
         $this->entity_manager = $em;
         $this->router         = $router;
         $this->form_factory   = $ff;
+        $this->message_bus    = $message_bus;
     }
 
     /**
@@ -92,6 +97,7 @@ class GNUsocial implements EventSubscriberInterface
         DB::setManager($this->entity_manager);
         Router::setRouter($this->router);
         Form::setFactory($this->form_factory);
+        Queue::setMessageBus($this->message_bus);
 
         DefaultSettings::setDefaults();
         ModulesManager::loadModules();

src/Core/Queue/Message.php

@@ -0,0 +1,36 @@
+<?php
+
+// {{{ License
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social 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.
+//
+// GNU social 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 GNU social.  If not, see <http://www.gnu.org/licenses/>.
+// }}}
+
+/**
+ * Generic message wrapper
+ */
+
+namespace App\Core\Queue;
+
+class Message
+{
+    public $content;
+    public string $queue;
+
+    public function __construct($content, string $queue)
+    {
+        $this->queue   = $queue;
+        $this->content = $content;
+    }
+}

src/Core/Queue/MessageHandler.php

@@ -0,0 +1,35 @@
+<?php
+
+// {{{ License
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social 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.
+//
+// GNU social 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 GNU social.  If not, see <http://www.gnu.org/licenses/>.
+// }}}
+
+/**
+ * Generic handler, distributes work based o
+ */
+
+namespace App\Core\Queue;
+
+use App\Core\Event;
+use Symfony\Component\Messenger\Handler\MessageHandlerInterface;
+
+class MessageHandler implements MessageHandlerInterface
+{
+    public function __invoke(Message $message)
+    {
+        Event::handle($message->queue, [$message->content]);
+    }
+}

src/Core/Queue/MessageHigh.php

@@ -0,0 +1,28 @@
+<?php
+
+// {{{ License
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social 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.
+//
+// GNU social 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 GNU social.  If not, see <http://www.gnu.org/licenses/>.
+// }}}
+
+/**
+ * Generic high priority message wrapper
+ */
+
+namespace App\Core\Queue;
+
+class MessageHigh extends Message
+{
+}

src/Core/Queue/MessageLow.php

@@ -0,0 +1,28 @@
+<?php
+
+// {{{ License
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social 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.
+//
+// GNU social 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 GNU social.  If not, see <http://www.gnu.org/licenses/>.
+// }}}
+
+/**
+ * Generic low priority message wrapper
+ */
+
+namespace App\Core\Queue;
+
+class MessageLow extends Message
+{
+}

src/Core/Queue/Queue.php

@@ -0,0 +1,58 @@
+<?php
+
+// {{{ License
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social 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.
+//
+// GNU social 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 GNU social.  If not, see <http://www.gnu.org/licenses/>.
+// }}}
+
+/**
+ * Queue wrapper
+ *
+ * @package  GNUsocial
+ * @category Wrapper
+ *
+ * @author    Hugo Sales <hugo@fc.up.pt>
+ * @copyright 2020 Free Software Foundation, Inc http://www.fsf.org
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
+ */
+
+namespace App\Core\Queue;
+
+use Symfony\Component\Messenger\MessageBusInterface;
+
+abstract class Queue
+{
+    private static ?MessageBusInterface $message_bus;
+
+    public static function setMessageBus($mb): void
+    {
+        self::$message_bus = $mb;
+    }
+
+    /**
+     * Enqueue a $message in a configured trasnport, to be handled by the $queue handler
+     *
+     * @param object|string
+     * @param mixed $message
+     */
+    public static function enqueue($message, string $queue, bool $high = false, array $stamps = [])
+    {
+        if ($high) {
+            self::$message_bus->dispatch(new MessageHigh($message, $queue), $stamps);
+        } else {
+            self::$message_bus->dispatch(new MessageLow($message, $queue), $stamps);
+        }
+    }
+}