WHENEVER SCHEDULER

https://github.com/javan/whenever
https://www.sitepoint.com/schedule-cron-jobs-whenever-gem/


Gemfile:-

gem 'whenever', :require => false

For creating scheduler.rb file :- Run that command

wheneverize .

# file: config/schedule.rb

set :environment, "development"
set :output, {:error => "log/cron_error_log.log", :standard => "log/cron_log.log"}

For running the Rake task use:-

every 1.minute do
  rake "shop_products:shop_product_upload_url"
end

For running the Sidekiq Worker :-

every 1.minute do
  runner "UpdateShopProductWorker.perform_async"
end

Rake task:-

lib/tasks/shop.rake

namespace :shop_product do
  task :shop_url => :environment do
    ShopProductUploadUrl.all.each do |csv_data|
       # our operation
    end
  end
end

Worker:-

worker/updateshopproductworker.rb

class UpdateShopProductWorker
    include Sidekiq::Worker
    LOGGER = Logger.new("#{Rails.root}/log/cron_log.log")

    def perform
        update_shop_products
    end

    def update_shop_products
       ShopProductUploadUrl.all.each do |product_url|

         #  operation

       end   
    end
end

Running the whenever in command line:-

bundle exec whenever

then it will generate :-
* * * * * /bin/bash -l -c 'cd /home/yuva/Desktop/02_selectivo_project/selectivo && bin/rails runner -e development '\''UpdateShopProductWorker.perform_async'\'' >> log/cron_log.log 2>> log/cron_error_log.log'

Run on command line then the whenever will run automatically . 


When whenever not working :-

chmod u+x bin/railsbundle exec rake rails:update:bin

http://stackoverflow.com/questions/23297832/weird-rails-error-permission-denied-bin-rails-for-old-rails-apps