X-Git-Url: http://git.squeep.com/?a=blobdiff_plain;f=lib%2Fpleroma%2Fgun%2Fconnection_pool%2Fworker.ex;h=c36332817d1c585a0f4776468f104bae639ffe05;hb=9b85592b8bb5b61de6a67d087beecbb651ffb397;hp=f33447cb6352c137f88e2b15757c1145bd9445b0;hpb=6931dbfa582f0e5360e74dffdceee1b9ed564b17;p=akkoma

diff --git a/lib/pleroma/gun/connection_pool/worker.ex b/lib/pleroma/gun/connection_pool/worker.ex
index f33447cb6..c36332817 100644
--- a/lib/pleroma/gun/connection_pool/worker.ex
+++ b/lib/pleroma/gun/connection_pool/worker.ex
@@ -36,7 +36,24 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
   end
 
   @impl true
-  def handle_cast({:add_client, client_pid, send_pid_back}, %{key: key} = state) do
+  def handle_cast({:add_client, client_pid}, state) do
+    case handle_call(:add_client, {client_pid, nil}, state) do
+      {:reply, conn_pid, state, :hibernate} ->
+        send(client_pid, {:conn_pid, conn_pid})
+        {:noreply, state, :hibernate}
+    end
+  end
+
+  @impl true
+  def handle_cast({:remove_client, client_pid}, state) do
+    case handle_call(:remove_client, {client_pid, nil}, state) do
+      {:reply, _, state, :hibernate} ->
+        {:noreply, state, :hibernate}
+    end
+  end
+
+  @impl true
+  def handle_call(:add_client, {client_pid, _}, %{key: key} = state) do
     time = :erlang.monotonic_time(:millisecond)
 
     {{conn_pid, _, _, _}, _} =
@@ -44,8 +61,6 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
         {conn_pid, [client_pid | used_by], crf(time - last_reference, crf), time}
       end)
 
-    if send_pid_back, do: send(client_pid, {:conn_pid, conn_pid})
-
     state =
       if state.timer != nil do
         Process.cancel_timer(state[:timer])
@@ -57,28 +72,36 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
     ref = Process.monitor(client_pid)
 
     state = put_in(state.client_monitors[client_pid], ref)
-    {:noreply, state, :hibernate}
+    {:reply, conn_pid, state, :hibernate}
   end
 
   @impl true
-  def handle_cast({:remove_client, client_pid}, %{key: key} = state) do
+  def handle_call(:remove_client, {client_pid, _}, %{key: key} = state) do
     {{_conn_pid, used_by, _crf, _last_reference}, _} =
       Registry.update_value(@registry, key, fn {conn_pid, used_by, crf, last_reference} ->
         {conn_pid, List.delete(used_by, client_pid), crf, last_reference}
       end)
 
     {ref, state} = pop_in(state.client_monitors[client_pid])
-    Process.demonitor(ref)
-
-    timer =
-      if used_by == [] do
-        max_idle = Pleroma.Config.get([:connections_pool, :max_idle_time], 30_000)
-        Process.send_after(self(), :idle_close, max_idle)
+    # DOWN message can receive right after `remove_client` call and cause worker to terminate
+    state =
+      if is_nil(ref) do
+        state
       else
-        nil
+        Process.demonitor(ref)
+
+        timer =
+          if used_by == [] do
+            max_idle = Pleroma.Config.get([:connections_pool, :max_idle_time], 30_000)
+            Process.send_after(self(), :idle_close, max_idle)
+          else
+            nil
+          end
+
+        %{state | timer: timer}
       end
 
-    {:noreply, %{state | timer: timer}, :hibernate}
+    {:reply, :ok, state, :hibernate}
   end
 
   @impl true
@@ -88,36 +111,32 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
     {:stop, :normal, state}
   end
 
+  @impl true
+  def handle_info({:gun_up, _pid, _protocol}, state) do
+    {:noreply, state, :hibernate}
+  end
+
   # Gracefully shutdown if the connection got closed without any streams left
   @impl true
   def handle_info({:gun_down, _pid, _protocol, _reason, []}, state) do
     {:stop, :normal, state}
   end
 
-  # Otherwise, shutdown with an error
+  # Otherwise, wait for retry
   @impl true
-  def handle_info({:gun_down, _pid, _protocol, _reason, _killed_streams} = down_message, state) do
-    {:stop, {:error, down_message}, state}
+  def handle_info({:gun_down, _pid, _protocol, _reason, _killed_streams}, state) do
+    {:noreply, state, :hibernate}
   end
 
   @impl true
   def handle_info({:DOWN, _ref, :process, pid, reason}, state) do
-    # Sometimes the client is dead before we demonitor it in :remove_client, so the message
-    # arrives anyway
-
-    case state.client_monitors[pid] do
-      nil ->
-        {:noreply, state, :hibernate}
-
-      _ref ->
-        :telemetry.execute(
-          [:pleroma, :connection_pool, :client_death],
-          %{client_pid: pid, reason: reason},
-          %{key: state.key}
-        )
+    :telemetry.execute(
+      [:pleroma, :connection_pool, :client_death],
+      %{client_pid: pid, reason: reason},
+      %{key: state.key}
+    )
 
-        handle_cast({:remove_client, pid}, state)
-    end
+    handle_cast({:remove_client, pid}, state)
   end
 
   # LRFU policy: https://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.55.1478