lib/good_job/capsule.rb in good_job-3.15.14 vs lib/good_job/capsule.rb in good_job-3.16.0

@@ -1,24 +1,25 @@
 # frozen_string_literal: true
+
 module GoodJob
   # A GoodJob::Capsule contains the resources necessary to execute jobs, including
   # a {GoodJob::Scheduler}, {GoodJob::Poller}, {GoodJob::Notifier}, and {GoodJob::CronManager}.
   # GoodJob creates a default capsule on initialization.
   class Capsule
     # @!attribute [r] instances
     #   @!scope class
     #   List of all instantiated Capsules in the current process.
     #   @return [Array<GoodJob::Capsule>, nil]
-    cattr_reader :instances, default: [], instance_reader: false
+    cattr_reader :instances, default: Concurrent::Array.new, instance_reader: false
 
     # @param configuration [GoodJob::Configuration] Configuration to use for this capsule.
     def initialize(configuration: GoodJob.configuration)
-      self.class.instances << self
       @configuration = configuration
-
       @startable = true
       @running = false
       @mutex = Mutex.new
+
+      self.class.instances << self
     end
 
     # Start the capsule once. After a shutdown, {#restart} must be used to start again.
     # @return [nil, Boolean] Whether the capsule was started.
     def start(force: false)