add backgroub job

Gemfile

@@ -38,6 +38,7 @@ gem 'i18n-js'
 gem 'rsolr'
 gem 'config'
 gem 'therubyracer'
+gem 'sidekiq'
 # Use ActiveStorage variant
 # gem 'mini_magick', '~> 4.8'
 

Gemfile.lock

@@ -110,6 +110,7 @@ GEM
     config (2.2.1)
       deep_merge (~> 1.2, >= 1.2.1)
       dry-validation (~> 1.0, >= 1.0.0)
+    connection_pool (2.2.3)
     crass (1.0.6)
     deep_merge (1.2.1)
     devise (4.7.3)
@@ -270,6 +271,7 @@ GEM
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
+    redis (4.2.2)
     ref (2.0.0)
     regexp_parser (1.8.0)
     request_store (1.5.0)
@@ -311,6 +313,10 @@ GEM
     selenium-webdriver (3.142.7)
       childprocess (>= 0.5, < 4.0)
       rubyzip (>= 1.2.2)
+    sidekiq (6.1.2)
+      connection_pool (>= 2.2.2)
+      rack (~> 2.0)
+      redis (>= 4.2.0)
     spring (2.1.1)
     spring-watcher-listen (2.0.1)
       listen (>= 2.7, < 4.0)
@@ -392,6 +398,7 @@ DEPENDENCIES
   rubocop
   sass-rails (~> 5.0)
   selenium-webdriver
+  sidekiq
   spring
   spring-watcher-listen (~> 2.0.0)
   therubyracer

app/controllers/apply_job_controller.rb

@@ -33,7 +33,7 @@ class ApplyJobController < ApplicationController
     apply_data.job_id = session[:job_id]
     apply_data.cv.retrieve_from_cache!(session[:cache_name])
     if apply_data.save
-      AppliedMailer.applied_job_mail_to(apply_data).deliver_now
+      SendEmailJob.set(wait: 10.seconds).perform_later(apply_data)
       render :done
     else
       flash[:error] = t('apply_job.error')

app/jobs/send_email_job.rb

+class SendEmailJob < ApplicationJob
+  queue_as :default
+
+  def perform(obj)
+    AppliedMailer.applied_job_mail_to(obj).deliver_now
+  end
+end

config/application.rb

@@ -21,5 +21,6 @@ module Venjob
     # Application configuration can go into files in config/initializers
     # -- all .rb files in that directory are automatically loaded after loading
     # the framework and any gems in your application.
+    config.active_job.queue_adapter = :sidekiq
   end
 end