jobs: add base ApplicationJob.

app/jobs/application_job.rb

@@ -0,0 +1,8 @@
+class ApplicationJob < ActiveJob::Base
+  queue_as :default
+  queue_with_priority 0
+
+  discard_on ActiveJob::DeserializationError do |job, error|
+    DanbooruLogger.log(error)
+  end
+end

config/environments/production.rb

@@ -62,7 +62,7 @@ Rails.application.configure do
   # config.cache_store = :mem_cache_store
 
   # Use a real queuing backend for Active Job (and separate queues per environment)
-  # config.active_job.queue_adapter     = :resque
+  config.active_job.queue_adapter = :delayed_job
   # config.active_job.queue_name_prefix = "danbooru_#{Rails.env}"
 
   config.action_mailer.perform_caching = false

test/jobs/application_job_test.rb

@@ -0,0 +1,22 @@
+require 'test_helper'
+
+class TestJob < ApplicationJob
+  def perform(record); end
+end
+
+class ApplicationJobTest < ActiveJob::TestCase
+  context "An active job" do
+    should "discard and log jobs with deserialization errors" do
+      DanbooruLogger.expects(:log)
+
+      assert_nothing_raised do
+        perform_enqueued_jobs do
+          tag = create(:tag, name: "tagme")
+          tag.delete
+
+          TestJob.perform_later(tag)
+        end
+      end
+    end
+  end
+end