implement alternative match-making approach with Lua scripts in Redis

main-server/config/environments/development.rb

@@ -3,6 +3,11 @@ require "active_support/core_ext/integer/time"
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
+  # Run background jobs (e.g. the matchmaking sweeper) through Solid Queue,
+  # supervised by the puma plugin.
+  config.active_job.queue_adapter = :solid_queue
+  config.solid_queue.connects_to = { database: { writing: :queue } }
+
   # Make code changes take effect immediately without server restart.
   config.enable_reloading = true
 

main-server/config/environments/production.rb

@@ -50,7 +50,8 @@ Rails.application.configure do
   config.cache_store = :memory_store
 
   # Replace the default in-process and non-durable queuing backend for Active Job.
-  config.active_job.queue_adapter = :async
+  config.active_job.queue_adapter = :solid_queue
+  config.solid_queue.connects_to = { database: { writing: :queue } }
 
   # Ignore bad email addresses and do not raise email delivery errors.
   # Set this to true and configure the email server for immediate delivery to raise delivery errors.