add lock events

lib/submissions/ensure_audit_generated.rb

@@ -0,0 +1,74 @@
+# frozen_string_literal: true
+
+module Submissions
+  module EnsureAuditGenerated
+    WAIT_FOR_RETRY = 2.seconds
+    CHECK_EVENT_INTERVAL = 1.second
+    CHECK_COMPLETE_TIMEOUT = 90.seconds
+    KEY_PREFIX = 'audit_trail'
+
+    WaitForCompleteTimeout = Class.new(StandardError)
+    NotCompletedYet = Class.new(StandardError)
+
+    module_function
+
+    def call(submission)
+      return nil unless submission
+
+      raise NotCompletedYet unless submission.submitters.all?(&:completed_at?)
+
+      key = [KEY_PREFIX, submission.id].join(':')
+
+      if ApplicationRecord.uncached { LockEvent.exists?(key:, event_name: :complete) }
+        return submission.audit_trail_attachment
+      end
+
+      events = ApplicationRecord.uncached { LockEvent.where(key:).order(:id).to_a }
+
+      if events.present? && events.last.event_name.in?(%w[start retry])
+        wait_for_complete_or_fail(submission)
+      else
+        LockEvent.create!(key:, event_name: events.present? ? :retry : :start)
+
+        result = Submissions::GenerateAuditTrail.call(submission)
+
+        LockEvent.create!(key:, event_name: :complete)
+
+        result
+      end
+    rescue ActiveRecord::RecordNotUnique
+      sleep WAIT_FOR_RETRY
+
+      retry
+    rescue StandardError => e
+      Rollbar.error(e) if defined?(Rollbar)
+      Rails.logger.error(e)
+
+      LockEvent.create!(key:, event_name: :fail)
+
+      raise
+    end
+
+    def wait_for_complete_or_fail(submission)
+      total_wait_time = 0
+
+      loop do
+        sleep CHECK_EVENT_INTERVAL
+        total_wait_time += CHECK_EVENT_INTERVAL
+
+        last_event =
+          ApplicationRecord.uncached do
+            LockEvent.where(key: [KEY_PREFIX, submission.id].join(':')).order(:id).last
+          end
+
+        if last_event.event_name.in?(%w[complete fail])
+          break ApplicationRecord.uncached do
+            ActiveStorage::Attachment.find_by(record: submission, name: 'audit_trail')
+          end
+        end
+
+        raise WaitForCompleteTimeout if total_wait_time > CHECK_COMPLETE_TIMEOUT
+      end
+    end
+  end
+end