From 011cfdaaf09ea79b38f7a6bd657176afd98202c3 Mon Sep 17 00:00:00 2001
From: KaylaBrady <31781298+KaylaBrady@users.noreply.github.com>
Date: Wed, 25 Sep 2024 10:00:42 -0400
Subject: [PATCH] feat(GlobalDataCache): Try populating cache out of band on
 startup

---
 lib/mobile_app_backend/global_data_cache.ex | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/mobile_app_backend/global_data_cache.ex b/lib/mobile_app_backend/global_data_cache.ex
index c98864c..60a9fec 100644
--- a/lib/mobile_app_backend/global_data_cache.ex
+++ b/lib/mobile_app_backend/global_data_cache.ex
@@ -132,14 +132,21 @@ defmodule MobileAppBackend.GlobalDataCache.Impl do
       update_ms: opts[:update_ms] || :timer.minutes(5)
     }
 
+    Process.send_after(self(), :recalculate, :timer.seconds(1))
+
     {:ok, state}
   end
 
   @impl GenServer
-  def handle_info(:recalculate, %State{} = state) do
+  def handle_info(:recalculate, %State{update_ms: update_ms} = state) do
     update_data(state.key)
 
-    Process.send_after(self(), :recalculate, state.update_ms)
+    if :persistent_term.get(state.key, nil) do
+      Process.send_after(self(), :recalculate, update_ms)
+    else
+      # no data yet, try again sooner
+      Process.send_after(self(), :recalculate, :timer.seconds(5))
+    end
 
     {:noreply, state}
   end