diff core/lib/Drupal/Core/Queue/Batch.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/Queue/Batch.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,64 @@
+<?php
+
+namespace Drupal\Core\Queue;
+
+/**
+ * Defines a batch queue handler used by the Batch API.
+ *
+ * This implementation:
+ * - Ensures FIFO ordering.
+ * - Allows an item to be repeatedly claimed until it is actually deleted (no
+ *   notion of lease time or 'expire' date), to allow multipass operations.
+ *
+ * Stale items from failed batches are cleaned from the {queue} table on cron
+ * using the 'created' date.
+ *
+ * @ingroup queue
+ */
+class Batch extends DatabaseQueue {
+
+  /**
+   * Overrides \Drupal\Core\Queue\DatabaseQueue::claimItem().
+   *
+   * Unlike \Drupal\Core\Queue\DatabaseQueue::claimItem(), this method provides
+   * a default lease time of 0 (no expiration) instead of 30. This allows the
+   * item to be claimed repeatedly until it is deleted.
+   */
+  public function claimItem($lease_time = 0) {
+    try {
+      $item = $this->connection->queryRange('SELECT data, item_id FROM {queue} q WHERE name = :name ORDER BY item_id ASC', 0, 1, [':name' => $this->name])->fetchObject();
+      if ($item) {
+        $item->data = unserialize($item->data);
+        return $item;
+      }
+    }
+    catch (\Exception $e) {
+      $this->catchException($e);
+    }
+    return FALSE;
+  }
+
+  /**
+   * Retrieves all remaining items in the queue.
+   *
+   * This is specific to Batch API and is not part of the
+   * \Drupal\Core\Queue\QueueInterface.
+   *
+   * @return array
+   *   An array of queue items.
+   */
+  public function getAllItems() {
+    $result = [];
+    try {
+      $items = $this->connection->query('SELECT data FROM {queue} q WHERE name = :name ORDER BY item_id ASC', [':name' => $this->name])->fetchAll();
+      foreach ($items as $item) {
+        $result[] = unserialize($item->data);
+      }
+    }
+    catch (\Exception $e) {
+      $this->catchException($e);
+    }
+    return $result;
+  }
+
+}