From 28c74bc9a59aac6e6650ce7fd9b3da79c350c635 Mon Sep 17 00:00:00 2001
From: Sebastian Serth <Sebastian.Serth@hpi.de>
Date: Sun, 24 Oct 2021 13:01:17 +0200
Subject: [PATCH] Improve memoization of @strategy_class

---
 app/models/runner.rb | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/app/models/runner.rb b/app/models/runner.rb
index fbe317cd..4931db8e 100644
--- a/app/models/runner.rb
+++ b/app/models/runner.rb
@@ -11,8 +11,10 @@ class Runner < ApplicationRecord
   attr_accessor :strategy
 
   def self.strategy_class
-    strategy_name = CodeOcean::Config.new(:code_ocean).read[:runner_management][:strategy]
-    @strategy_class ||= "runner/strategy/#{strategy_name}".camelize.constantize
+    @strategy_class ||= begin
+      strategy_name = CodeOcean::Config.new(:code_ocean).read[:runner_management][:strategy]
+      "runner/strategy/#{strategy_name}".camelize.constantize
+    end
   end
 
   def self.management_active?