From 19b9e1e2c3d621b5f9f2367980dae62648fe22fa Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Sun, 5 Feb 2017 17:24:18 +0100
Subject: [PATCH] Preheat status cache

---
 app/services/warm_cache_service.rb | 8 ++++++++
 app/workers/distribution_worker.rb | 5 ++++-
 config/environments/development.rb | 5 +++--
 config/environments/production.rb  | 2 +-
 4 files changed, 16 insertions(+), 4 deletions(-)
 create mode 100644 app/services/warm_cache_service.rb

diff --git a/app/services/warm_cache_service.rb b/app/services/warm_cache_service.rb
new file mode 100644
index 00000000..091a471f
--- /dev/null
+++ b/app/services/warm_cache_service.rb
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+class WarmCacheService < BaseService
+  def call(cacheable)
+    full_item = cacheable.class.where(id: cacheable.id).with_includes.first
+    Rails.cache.write(cacheable.cache_key, full_item)
+  end
+end
diff --git a/app/workers/distribution_worker.rb b/app/workers/distribution_worker.rb
index f423d43a..f4e738d8 100644
--- a/app/workers/distribution_worker.rb
+++ b/app/workers/distribution_worker.rb
@@ -4,7 +4,10 @@ class DistributionWorker
   include Sidekiq::Worker
 
   def perform(status_id)
-    FanOutOnWriteService.new.call(Status.find(status_id))
+    status = Status.find(status_id)
+
+    FanOutOnWriteService.new.call(status)
+    WarmCacheService.new.call(status)
   rescue ActiveRecord::RecordNotFound
     true
   end
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 51cb43e5..6157f20d 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -20,11 +20,12 @@ Rails.application.configure do
       host: ENV['REDIS_HOST'] || 'localhost',
       port: ENV['REDIS_PORT'] || 6379,
       db: 0,
-      namespace: 'cache'
+      namespace: 'cache',
+      expires_in: 1.minute,
     }
 
     config.public_file_server.headers = {
-      'Cache-Control' => 'public, max-age=172800'
+      'Cache-Control' => 'public, max-age=172800',
     }
   else
     config.action_controller.perform_caching = false
diff --git a/config/environments/production.rb b/config/environments/production.rb
index eaddba52..62ea217e 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -64,7 +64,7 @@ Rails.application.configure do
     password: ENV.fetch('REDIS_PASSWORD') { false },
     db: 0,
     namespace: 'cache',
-    expires_in: 20.minutes
+    expires_in: 20.minutes,
   }
 
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.