--- /dev/null
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Feed\PubSubHubbub\Model;
+
+interface SubscriptionPersistenceInterface
+{
+ /**
+ * Save subscription to RDMBS
+ *
+ * @param array $data The key must be stored here as a $data['id'] entry
+ * @return bool
+ */
+ public function setSubscription(array $data);
+
+ /**
+ * Get subscription by ID/key
+ *
+ * @param string $key
+ * @return array
+ */
+ public function getSubscription($key);
+
+ /**
+ * Determine if a subscription matching the key exists
+ *
+ * @param string $key
+ * @return bool
+ */
+ public function hasSubscription($key);
+
+ /**
+ * Delete a subscription
+ *
+ * @param string $key
+ * @return bool
+ */
+ public function deleteSubscription($key);
+}