26th day of engineer who will become full-fledged in 100 days

Yes, it's the 26th day at the earliest. Today's theme

After connecting to redis with docker, perform asynchronous processing using sidekiq

I will do it.

DockerFile

First, add the description of redis to the docker file.

The image and port number are specified in the redis: part. After that, I specified redis_url in environment.

version: '3'
services:
  db:
    image: postgres:11.2-alpine
    volumes:
      - ./tmp/db:/var/lib/postgresql/data
  web:
    build: .
    command: /bin/sh
    environment:
      WEBPACKER_DEV_SERVER_HOST: "0.0.0.0"
      RAILS_SERVE_STATIC_FILES: "1"
      EDITOR: "vim"
      REDIS_URL: redis://redis:6379
    volumes:
      - ./apps:/apps
    ports:
      - "3000:3000"
      - "3035:3035"
    depends_on:
      - db
    tty: true
      
  redis:
    image: redis:latest
    ports:
      - 6379:6379

The Gemfile looks like this.

Gemfile

gem 'redis-rails' gem'sidekiq' is added. Since an error occurred when sidekiq was updated, the version is specified as follows. gem 'sidekiq', "~> 5.0"

source "https://rubygems.org"
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby "2.6.4"

gem "rails", "~> 6.0.0"
gem "pg", ">= 0.18", "< 2.0"
gem "puma", "~> 3.11"
gem "sass-rails", "~> 5"
gem "webpacker", "~> 4.0"
gem "turbolinks", "~> 5"
gem "jbuilder", "~> 2.7"

gem "bootsnap", ">= 1.4.2", require: false

gem "bcrypt"
gem "rails-i18n"
gem "kaminari"
gem "date_validator"
gem "valid_email2"
gem "nokogiri"
gem "slim-rails"
gem "html2slim"

#to add
gem 'redis-rails'
gem 'sidekiq', "~> 5.0"
...

config

Now add the following settings to config / initializers / redis.rb. You have now added the redis URL.

`redis.rb`


REDIS ||= Redis.new(url: ENV['REDIS_URL'] || 'redis://localhost:6379')

And add sidekiq settings to config / environment / development.rb

`config/environment/development.rb`


config.active_job.queue_adapter = :sidekiq

Now that we've modified the Gemfile, run the bundle command

$ bundle

Start sidekiq

Then run the bundle exec sidekiq command to start Sidekiq.

$ bundle exec sidekiq

bash-4.4$ bundle exec sidekiq


         m,
         `$b
    .ss,  $$:         .,d$
    `$$P,d$P'    .,md$P"'
     ,$$$$$bmmd$$$P^'
   .d$$$$$$$$$$P'
   $$^' `"^$$$'       ____  _     _      _    _
   $:     ,$$:       / ___|(_) __| | ___| | _(_) __ _
   `b     :$$        \___ \| |/ _` |/ _ \ |/ / |/ _` |
          $$:         ___) | | (_| |  __/   <| | (_| |
          $$         |____/|_|\__,_|\___|_|\_\_|\__, |
        .d$$                                       |_|

I got up properly. From here, I will write asynchronous processing.

Asynchronous processing

Creating a job

$ bin/rails g job sample

Running via Spring preloader in process 22386
  invoke test_unit
  create...

The task is now generated. The app / jobs / sample_job.rb file has been created. This time, the task will write a task to display a character string in log.

class SampleJob < ApplicationJob
  queue_as :default

  def perform(*args)
    Sidekiq::Logging.logger.info "-----I ran a sample job.-----"
  end
end

I will write like this. Since the outer frame is created by rails g job, each part is actually only the Sidekiq :: Logging ... line.

Call job on controller

Call job on the controller.

A log output job is executed asynchronously using a method called perform_later.

`controller.rb`


class Admin::TopController < Admin::Base
  def index
    SampleJob.perform_later
  end
end

When you access the index screen and check the log of sidekiq ..

2020-06-15T11:30:52.383Z 15 TID-gphk3l13j SampleJob JID-631a85bb82f73f2a07beb772 INFO: ---------I ran a sample job.-------------

You can see that the job is running asynchronously like this!

Specify execution date and time

You can also specify the date and time to execute. You can use the set method to run the job at noon the next day.

SampleJob.set(wait_until: Date.tomorrow.noon).perform_later

The end

That's all for asynchronous processing using sidekiq after connecting to redis with docker. Thank you very much.

** 74 days left until full-fledged **