Added warning and info for queue factory.

modules/quant_purger/README.md

@@ -1,8 +1,31 @@
 # Quant cache tag purger
 
-Adds a cache tag plugin which listen to invalidation events to queue Quant repopulation. This allows node_saves to update the main page but also trigger updates for pages that might be affected by the content update (eg. views pages). These will be added to the queue for the next core cron run to publish the updates.
+Adds a cache tag plugin which listens to Drupal invalidation events in order to
+queue Quant updates for related content.
+
+For example, this allows node edits to trigger the main (`/node`) page to update
+along with any other pages associated with the node through cache tags (e.g.
+views pages, taxonomy term pages, etc).
+
+This also works with other entities. For example, if a term is associated with
+several nodes, those nodes will be queued for updates when the term is edited.
+
+To ensure that queued content is processed in a timely manner, you can set up a
+Quant cron process that is separate from the core cron which just processes the
+Quant queue. This Quant cron can be run more regularly than the core cron.
+
+See [Quant Purger documentation](https://docs.quantcdn.io/docs/integrations/drupal/purger)
+for additional information.
 
 ## Requirements
 
   - quant
   - purge
+
+## Recommendations
+
+For the best performance, it is highly recommended that your settings include:
+
+```
+$settings['queue_service_quant_seed_worker'] = 'quant.queue_factory';
+```

quant.module

@@ -9,6 +9,7 @@ use Drupal\Core\Access\AccessResult;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Session\AccountInterface;
+use Drupal\Core\Site\Settings;
 use Drupal\Core\Url;
 use Drupal\node\NodeInterface;
 use Drupal\quant\Exception\TokenValidationDisabledException;
@@ -435,10 +436,15 @@ function quant_preprocess_page(&$variables) {
   // Show the Quant page info block for non-admin pages if enabled.
   $config = \Drupal::configFactory()->getEditable('quant.settings');
   $enabled = $config->get('quant_show_page_info_block');
-
   if ($enabled && !\Drupal::service('router.admin_context')->isAdminRoute()) {
     $variables['page']['content']['#prefix'] = Utility::getPageInfo() . ($variables['page']['content']['#prefix'] ?? '');
   }
+
+  // Add warning on Quant admin pages if queue factory is not set.
+  $current_path = \Drupal::requestStack()->getCurrentRequest()->getPathInfo();
+  if ((strpos($current_path, '/admin/config/quant') === 0) && Settings::get('queue_service_quant_seed_worker') != "quant.queue_factory") {
+    \Drupal::messenger()->addWarning(t('For the best performance, it is highly recommended you update <em>queue_service_quant_seed_worker</em> in your settings. See the <a href="https://docs.quantcdn.io/docs/integrations/drupal">Drupal docs</a> for setup information.'));
+  }
 }
 
 /**

src/QuantQueue.php

@@ -44,7 +44,6 @@ public function doCreateItem($data) {
       return $query->execute();
     }
     catch (IntegrityConstraintViolationException $err) {
-      var_dump('skipping cause exists');
       return FALSE;
     }
   }