Use Sidekiq for PDS jobs

This updates the PDS jobs to use Sidekiq as their queue adapter rather
than Good Job as we think the performance will be better.

Author: thomasleese

app/jobs/concerns/nhs_api_concurrency_concern_sidekiq.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+module NHSAPIConcurrencyConcernSidekiq
+  extend ActiveSupport::Concern
+
+  include Sidekiq::Job
+  include Sidekiq::Throttled::Job
+
+  included do
+    self.queue_adapter = :sidekiq unless Rails.env.test?
+
+    queue_as :pds
+
+    sidekiq_throttle_as :pds
+
+    retry_on Faraday::ServerError, wait: :polynomially_longer
+  end
+end

app/jobs/patient_nhs_number_lookup_job.rb

@@ -1,12 +1,7 @@
 # frozen_string_literal: true
 
 class PatientNHSNumberLookupJob < ApplicationJob
-  def self.concurrent_jobs_per_second = 5
-  def self.concurrency_key = :pds
-
-  include NHSAPIConcurrencyConcernGoodJob
-
-  queue_as :imports
+  include NHSAPIConcurrencyConcernSidekiq
 
   def perform(patient)
     return if patient.nhs_number.present? && !patient.invalidated?

app/jobs/patient_update_from_pds_job.rb

@@ -1,12 +1,7 @@
 # frozen_string_literal: true
 
 class PatientUpdateFromPDSJob < ApplicationJob
-  def self.concurrent_jobs_per_second = 5
-  def self.concurrency_key = :pds
-
-  include NHSAPIConcurrencyConcernGoodJob
-
-  queue_as :pds
+  include NHSAPIConcurrencyConcernSidekiq
 
   def perform(patient)
     raise MissingNHSNumber if patient.nhs_number.nil?

config/initializers/sidekiq.rb

@@ -17,3 +17,11 @@
   config.cooldown_period = 1.0
   config.cooldown_threshold = 2000
 end
+
+Sidekiq::Throttled::Registry.add(
+  :pds,
+  threshold: {
+    limit: 5,
+    period: 1.second
+  }
+)