diff --git a/radicale/app/delete.py b/radicale/app/delete.py
index c3a9b12a..c27b3917 100644
--- a/radicale/app/delete.py
+++ b/radicale/app/delete.py
@@ -21,7 +21,7 @@ from http import client
 from xml.etree import ElementTree as ET
 
 from radicale import app, httputils, storage, xmlutils
-from radicale.hook.rabbitmq import QueueItem, QueueItemTypes
+from radicale.hook import HookNotificationItem, HookNotificationItemTypes
 
 
 def xml_delete(base_prefix, path, collection, href=None):
@@ -66,10 +66,14 @@ class ApplicationDeleteMixin:
             if isinstance(item, storage.BaseCollection):
                 xml_answer = xml_delete(base_prefix, path, item)
                 for item in item.get_all():
-                    self._hook.notify(QueueItem(QueueItemTypes.DELETE, item.uid))
+                    hook_notification_item = \
+                        HookNotificationItem(HookNotificationItemTypes.DELETE, item.uid)
+                    self._hook.notify(hook_notification_item)
             else:
                 xml_answer = xml_delete(
                     base_prefix, path, item.collection, item.href)
-                self._hook.notify(QueueItem(QueueItemTypes.DELETE, item.uid))
+                hook_notification_item = \
+                    HookNotificationItem(HookNotificationItemTypes.DELETE, item.uid)
+                self._hook.notify(hook_notification_item)
             headers = {"Content-Type": "text/xml; charset=%s" % self._encoding}
             return client.OK, headers, self._write_xml_content(xml_answer)
diff --git a/radicale/app/put.py b/radicale/app/put.py
index 8f675255..e97c0885 100644
--- a/radicale/app/put.py
+++ b/radicale/app/put.py
@@ -29,7 +29,7 @@ from radicale import app, httputils
 from radicale import item as radicale_item
 from radicale import pathutils, rights, storage, xmlutils
 from radicale.log import logger
-from radicale.hook.rabbitmq import QueueItem, QueueItemTypes
+from radicale.hook import HookNotificationItem, HookNotificationItemTypes
 
 MIMETYPE_TAGS = {value: key for key, value in xmlutils.MIMETYPES.items()}
 
@@ -195,7 +195,9 @@ class ApplicationPutMixin:
                     etag = self._storage.create_collection(
                         path, prepared_items, props).etag
                     for item in prepared_items:
-                        self._hook.notify(QueueItem(QueueItemTypes.UPSERT, item.serialize()))
+                        hook_notification_item = \
+                            HookNotificationItem(HookNotificationItemTypes.UPSERT, item.serialize())
+                        self._hook.notify(hook_notification_item)
                 except ValueError as e:
                     logger.warning(
                         "Bad PUT request on %r: %s", path, e, exc_info=True)
@@ -211,7 +213,9 @@ class ApplicationPutMixin:
                 href = posixpath.basename(pathutils.strip_path(path))
                 try:
                     etag = parent_item.upload(href, prepared_item).etag
-                    self._hook.notify(QueueItem(QueueItemTypes.UPSERT, prepared_item.serialize()))
+                    hook_notification_item = \
+                        HookNotificationItem(HookNotificationItemTypes.UPSERT, prepared_item.serialize())
+                    self._hook.notify(hook_notification_item)
                 except ValueError as e:
                     logger.warning(
                         "Bad PUT request on %r: %s", path, e, exc_info=True)
diff --git a/radicale/hook/__init__.py b/radicale/hook/__init__.py
index 1dd1d1b8..46956faa 100644
--- a/radicale/hook/__init__.py
+++ b/radicale/hook/__init__.py
@@ -1,4 +1,7 @@
+import json
+
 from radicale import utils
+from enum import Enum
 
 INTERNAL_TYPES = ("none", "rabbitmq")
 
@@ -20,6 +23,21 @@ class BaseHook:
         """
         self.configuration = configuration
 
-    def notify(self, content):
+    def notify(self, notification_item):
         """Upload a new or replace an existing item."""
         raise NotImplementedError
+
+
+class HookNotificationItemTypes(Enum):
+    UPSERT = "upsert"
+    DELETE = "delete"
+
+
+class HookNotificationItem:
+
+    def __init__(self, notification_item_type, content):
+        self.type = notification_item_type.value
+        self.content = content
+
+    def to_json(self):
+        return json.dumps(self, default=lambda o: o.__dict__, sort_keys=True, indent=4)
diff --git a/radicale/hook/none.py b/radicale/hook/none.py
index 2e5eb049..b770ab67 100644
--- a/radicale/hook/none.py
+++ b/radicale/hook/none.py
@@ -2,5 +2,5 @@ from radicale import hook
 
 
 class Hook(hook.BaseHook):
-    def notify(self, content):
+    def notify(self, notification_item):
         """Notify nothing. Empty hook."""
diff --git a/radicale/hook/rabbitmq/__init__.py b/radicale/hook/rabbitmq/__init__.py
index 43568125..9d24a65b 100644
--- a/radicale/hook/rabbitmq/__init__.py
+++ b/radicale/hook/rabbitmq/__init__.py
@@ -1,8 +1,7 @@
 import pika
-import json
 
+from radicale.hook import HookNotificationItem
 from radicale import hook
-from enum import Enum
 
 
 class Hook(hook.BaseHook):
@@ -24,24 +23,9 @@ class Hook(hook.BaseHook):
     def _make_declare_queue_synced(self, topic):
         self.channel.queue_declare(queue=topic)
 
-    def notify(self, content):
-        if not isinstance(content, QueueItem):
-            return
-        self.channel.basic_publish(exchange='',
-                                   routing_key=self.topic,
-                                   body=content.to_json().encode(encoding=self.encoding))
-
-
-class QueueItemTypes(Enum):
-    UPSERT = "upsert"
-    DELETE = "delete"
-
-
-class QueueItem:
-
-    def __init__(self, queue_item_type, content):
-        self.type = queue_item_type.value
-        self.content = content
-
-    def to_json(self):
-        return json.dumps(self, default=lambda o: o.__dict__, sort_keys=True, indent=4)
+    def notify(self, notification_item):
+        if isinstance(notification_item, HookNotificationItem):
+            self.channel.basic_publish(
+                exchange='',
+                routing_key=self.topic,
+                body=notification_item.to_json().encode(encoding=self.encoding))