Issue #3323520: Create a way to empty a queue

drush.services.yml

 services:
   advancedqueue.commands:
     class: \Drupal\advancedqueue\Commands\AdvancedQueueCommands
-    arguments: ['@entity_type.manager', '@advancedqueue.processor']
+    arguments: ['@entity_type.manager', '@advancedqueue.processor', '@database']
     tags:
       - { name: drush.command }

src/Commands/AdvancedQueueCommands.php

@@ -5,6 +5,7 @@ namespace Drupal\advancedqueue\Commands;
 use Consolidation\OutputFormatters\StructuredData\RowsOfFields;
 use Drupal\advancedqueue\Job;
 use Drupal\advancedqueue\ProcessorInterface;
+use Drupal\Core\Database\Connection;
 use Drupal\Core\Entity\EntityTypeManagerInterface;
 use Drupal\Core\StringTranslation\TranslatableMarkup;
 use Drush\Commands\DrushCommands;
@@ -28,6 +29,13 @@ class AdvancedQueueCommands extends DrushCommands {
    */
   protected $processor;
 
+  /**
+   * The database connection.
+   *
+   * @var \Drupal\Core\Database\Connection
+   */
+  protected $connection;
+
   /**
    * Constructs a new AdvancedQueueCommands object.
    *
@@ -36,11 +44,12 @@ class AdvancedQueueCommands extends DrushCommands {
    * @param \Drupal\advancedqueue\ProcessorInterface $processor
    *   The queue processor.
    */
-  public function __construct(EntityTypeManagerInterface $entity_type_manager, ProcessorInterface $processor) {
+  public function __construct(EntityTypeManagerInterface $entity_type_manager, ProcessorInterface $processor, Connection $connection) {
     parent::__construct();
 
     $this->entityTypeManager = $entity_type_manager;
     $this->processor = $processor;
+    $this->connection = $connection;
   }
 
   /**
@@ -135,4 +144,33 @@ class AdvancedQueueCommands extends DrushCommands {
     return new RowsOfFields($rows);
   }
 
+  /**
+   * Clear a queue.
+   *
+   * @param string $queue_id
+   *   The queue ID.
+   *
+   * @throws \Exception
+   *
+   * @command advancedqueue:queue:clear
+   * @usage advancedqueue:queue:clear commerce_recurring
+   */
+  public function clear($queue_id) {
+    if ($this->io()->confirm(dt("Are you sure you want to remove queue items for the the @queue_id queue?", ['@queue_id' => $queue_id]))) {
+      $queue_storage = $this->entityTypeManager->getStorage('advancedqueue_queue');
+      /** @var \Drupal\advancedqueue\Entity\QueueInterface $queue */
+      $queue = $queue_storage->load($queue_id);
+      if (!$queue) {
+        throw new \Exception(dt('Could not find queue "@queue_id".', ['@queue_id' => $queue_id]));
+      }
+
+      $this->connection->delete('advancedqueue')
+        ->condition('queue_id', $queue_id)
+        ->execute();
+      $this->io()->success(dt('The queue items for the the @queue queue have been deleted.', [
+        '@queue' => $queue->label(),
+      ]));
+    }
+  }
+
 }