Merge branch 'refactor/object-cache-deletion' into 'develop'

object cache deletion refactoring, part 2

See merge request pleroma/pleroma!409

lib/mix/tasks/rm_user.ex

@@ -7,7 +7,7 @@ def run([nickname]) do
     Mix.Task.run("app.start")
 
     with %User{local: true} = user <- User.get_by_nickname(nickname) do
-      User.delete(user)
+      {:ok, _} = User.delete(user)
     end
   end
 end

lib/pleroma/application.ex

@@ -16,14 +16,30 @@ def start(_type, _args) do
         supervisor(Pleroma.Web.Endpoint, []),
         # Start your own worker by calling: Pleroma.Worker.start_link(arg1, arg2, arg3)
         # worker(Pleroma.Worker, [arg1, arg2, arg3]),
-        worker(Cachex, [
+        worker(
+          Cachex,
+          [
             :user_cache,
             [
               default_ttl: 25000,
               ttl_interval: 1000,
               limit: 2500
             ]
-        ]),
+          ],
+          id: :cachex_user
+        ),
+        worker(
+          Cachex,
+          [
+            :object_cache,
+            [
+              default_ttl: 25000,
+              ttl_interval: 1000,
+              limit: 2500
+            ]
+          ],
+          id: :cachex_object
+        ),
         worker(
           Cachex,
           [

lib/pleroma/object.ex

@@ -37,7 +37,7 @@ def get_cached_by_ap_id(ap_id) do
     else
       key = "object:#{ap_id}"
 
-      Cachex.fetch!(:user_cache, key, fn _ ->
+      Cachex.fetch!(:object_cache, key, fn _ ->
         object = get_by_ap_id(ap_id)
 
         if object do
@@ -56,8 +56,8 @@ def context_mapping(context) do
   def delete(%Object{data: %{"id" => id}} = object) do
     with Repo.delete(object),
          Repo.delete_all(Activity.all_non_create_by_object_ap_id_q(id)),
-         {:ok, true} <- Cachex.del(:user_cache, "object:#{id}") do
+         {:ok, true} <- Cachex.del(:object_cache, "object:#{id}") do
-      :ok
+      {:ok, object}
     end
   end
 end

lib/pleroma/user.ex

@@ -295,6 +295,7 @@ def update_and_set_cache(changeset) do
   def invalidate_cache(user) do
     Cachex.del(:user_cache, "ap_id:#{user.ap_id}")
     Cachex.del(:user_cache, "nickname:#{user.nickname}")
+    Cachex.del(:user_cache, "user_info:#{user.id}")
   end
 
   def get_cached_by_ap_id(ap_id) do
@@ -656,7 +657,7 @@ def delete(%User{} = user) do
       end
     end)
 
-    :ok
+    {:ok, user}
   end
 
   def html_filter_policy(%User{info: %{"no_rich_text" => true}}) do

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -273,7 +273,7 @@ def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ tru
       "to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
     }
 
-    with Object.delete(object),
+    with {:ok, _} <- Object.delete(object),
          {:ok, activity} <- insert(data, local),
          :ok <- maybe_federate(activity),
          {:ok, _actor} <- User.decrease_note_count(user) do

test/object_test.exs

@@ -42,7 +42,7 @@ test "ensures cache is cleared for the object" do
 
       Object.delete(cached_object)
 
-      {:ok, nil} = Cachex.get(:user_cache, "object:#{object.data["id"]}")
+      {:ok, nil} = Cachex.get(:object_cache, "object:#{object.data["id"]}")
 
       cached_object = Object.get_cached_by_ap_id(object.data["id"])
 

test/user_test.exs

@@ -511,7 +511,7 @@ test ".delete deactivates a user, all follow relationships and all create activi
     {:ok, _, _} = CommonAPI.favorite(activity.id, follower)
     {:ok, _, _} = CommonAPI.repeat(activity.id, follower)
 
-    :ok = User.delete(user)
+    {:ok, _} = User.delete(user)
 
     followed = Repo.get(User, followed.id)
     follower = Repo.get(User, follower.id)
@@ -551,4 +551,31 @@ test "html_filter_policy returns TwitterText scrubber when rich-text is disabled
       assert Pleroma.HTML.Scrubber.TwitterText == User.html_filter_policy(user)
     end
   end
+
+  describe "caching" do
+    test "invalidate_cache works" do
+      user = insert(:user)
+      user_info = User.get_cached_user_info(user)
+
+      User.invalidate_cache(user)
+
+      {:ok, nil} = Cachex.get(:user_cache, "ap_id:#{user.ap_id}")
+      {:ok, nil} = Cachex.get(:user_cache, "nickname:#{user.nickname}")
+      {:ok, nil} = Cachex.get(:user_cache, "user_info:#{user.id}")
+    end
+
+    test "User.delete() plugs any possible zombie objects" do
+      user = insert(:user)
+
+      {:ok, _} = User.delete(user)
+
+      {:ok, cached_user} = Cachex.get(:user_cache, "ap_id:#{user.ap_id}")
+
+      assert cached_user != user
+
+      {:ok, cached_user} = Cachex.get(:user_cache, "nickname:#{user.ap_id}")
+
+      assert cached_user != user
+    end
+  end
 end