Extend pipelines queue mixin and add a default queue

app/workers/concerns/pipeline_queue.rb

+##
 # Concern for setting Sidekiq settings for the various CI pipeline workers.
+#
 module PipelineQueue
   extend ActiveSupport::Concern
 
   included do
-    sidekiq_options queue: :pipeline
+    sidekiq_options queue: 'pipelines-default'
+  end
+
+  class_methods do
+    def enqueue_in(queue:, group:)
+      raise ArgumentError if queue.empty? || group.empty?
+
+      sidekiq_options queue: "pipelines-#{queue}-#{group}"
+    end
   end
 end

app/workers/pipeline_update_worker.rb

@@ -2,6 +2,8 @@ class PipelineUpdateWorker
   include Sidekiq::Worker
   include PipelineQueue
 
+  enqueue_in queue: :pipeline, group: :processing
+
   def perform(pipeline_id)
     Ci::Pipeline.find_by(id: pipeline_id)
       .try(:update_status)

spec/workers/concerns/pipeline_queue_spec.rb

@@ -8,7 +8,17 @@ describe PipelineQueue do
     end
   end
 
-  it 'sets the queue name of a worker' do
-    expect(worker.sidekiq_options['queue'].to_s).to eq('pipeline')
+  it 'sets a default pipelines queue automatically' do
+    expect(worker.sidekiq_options['queue'])
+      .to eq 'pipelines-default'
+  end
+
+  describe '.enqueue_in' do
+    it 'sets a custom sidekiq queue with prefix, name and group' do
+      worker.enqueue_in(queue: :build, group: :processing)
+
+      expect(worker.sidekiq_options['queue'])
+        .to eq 'pipelines-build-processing'
+    end
   end
 end