Msgpack protocol

.github/workflows/system_test.yml

@@ -13,24 +13,7 @@ jobs:
       BUNDLE_JOBS: 4
       BUNDLE_RETRY: 3
       CI: true
-      DATABASE_URL: postgres://postgres:postgres@localhost:5432
-      CHROME_URL: http://localhost:3000
       RAILS_ENV: test
-    services:
-      postgres:
-        image: postgres:13.0
-        env:
-          POSTGRES_PASSWORD: postgres
-        ports: ["5432:5432"]
-        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
-      redis:
-        image: redis:5.0-alpine
-        ports: ["6379:6379"]
-        options: --health-cmd="redis-cli ping" --health-interval 1s --health-timeout 3s --health-retries 30
-      chrome:
-        image: browserless/chrome:1.31-chrome-stable
-        ports: ["3000:3000"]
-        options: -e CONNECTION_TIMEOUT=600000
     steps:
       - uses: actions/checkout@v2
       - uses: actions/cache@v1
@@ -42,9 +25,10 @@ jobs:
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 3.0.1
-      - name: Install PostgreSQL client
+      - name: Install libsqlite3
         run: |
-          sudo apt-get -yqq install libpq-dev
+          sudo apt-get update
+          sudo apt-get install libsqlite3-dev
       - name: Bundle install
         run: |
           bundle config path /home/runner/bundle
@@ -69,8 +53,5 @@ jobs:
       - name: Run RSpec
         run: |
           bundle exec rails db:prepare
-          bundle exec rails g anycable:download --bin-path=./bin
           bundle exec rails webpacker:compile
-          ./bin/anycable-go --host "0.0.0.0" &
-          export CABLE_URL="ws://$(hostname):8080/cable"
           bundle exec rspec --tag type:system

.github/workflows/unit_test.yml

@@ -13,19 +13,7 @@ jobs:
       BUNDLE_JOBS: 4
       BUNDLE_RETRY: 3
       CI: true
-      DATABASE_URL: postgres://postgres:postgres@localhost:5432
       RAILS_ENV: test
-    services:
-      postgres:
-        image: postgres:11.1
-        ports: ["5432:5432"]
-        env:
-          POSTGRES_PASSWORD: postgres
-        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
-      redis:
-        image: redis:5.0-alpine
-        ports: ["6379:6379"]
-        options: --health-cmd="redis-cli ping" --health-interval 1s --health-timeout 3s --health-retries 30
     steps:
       - uses: actions/checkout@v2
       - uses: actions/cache@v1
@@ -37,9 +25,10 @@ jobs:
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 3.0.1
-      - name: Install PostgreSQL client
+      - name: Install libsqlite3
         run: |
-          sudo apt-get -yqq install libpq-dev
+          sudo apt-get update
+          sudo apt-get install libsqlite3-dev
       - name: Bundle install
         run: |
           bundle config path /home/runner/bundle

Gemfile

@@ -5,9 +5,8 @@ ruby '3.0.1'
 
 gem 'rails', '~> 6.1'
 gem 'webpacker', '6.0.0.beta.6'
-gem 'pg', '~> 1.0'
+gem 'sqlite3', '~> 1.4'
 gem 'puma', '~> 4.1'
-gem 'redis', '~> 4.0'
 gem 'anycable', '> 1.0.99'
 gem 'anycable-rails', '> 1.0.99'
 
@@ -21,6 +20,10 @@ group :development, :test do
   gem 'pry-byebug'
   gem 'pry-rails'
   gem 'rspec-rails', '~> 4.0.0'
+
+  # Rack-based AnyCable server implementation
+  gem 'anycable-rack-server', '~> 0.4.0'
+  gem 'msgpack', '~> 1.4'
 end
 
 group :development do

Gemfile.lock

@@ -76,6 +76,11 @@ GEM
     anycable-core (1.1.0.rc1)
       anyway_config (>= 2.1.0)
       google-protobuf (>= 3.13)
+    anycable-rack-server (0.4.0)
+      anycable (> 1.0.99, < 2.0)
+      anyway_config (>= 2.1.0)
+      connection_pool (~> 2.2)
+      websocket (~> 1.2)
     anycable-rails (1.1.0.rc1.1)
       actioncable (>= 6)
       anycable-core (> 1.0.99, < 2.0)
@@ -101,6 +106,7 @@ GEM
       adamantium (~> 0.2.0)
       equalizer (~> 0.0.9)
     concurrent-ruby (1.1.8)
+    connection_pool (2.2.5)
     crass (1.0.6)
     cuprite (0.13)
       capybara (>= 2.1, < 4)
@@ -156,7 +162,6 @@ GEM
     parallel (1.20.1)
     parser (3.0.0.0)
       ast (~> 2.4.1)
-    pg (1.2.3)
     procto (0.0.3)
     pry (0.13.1)
       coderay (~> 1.1)
@@ -206,7 +211,6 @@ GEM
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    redis (4.2.5)
     regexp_parser (2.1.1)
     rexml (3.2.4)
     rspec-core (3.10.1)
@@ -263,6 +267,7 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
+    sqlite3 (1.4.2)
     standard (1.0.4)
       rubocop (= 1.11.0)
       rubocop-performance (= 1.10.1)
@@ -289,6 +294,7 @@ GEM
       rack-proxy (>= 0.6.1)
       railties (>= 5.2)
       semantic_range (>= 2.3.0)
+    websocket (1.2.9)
     websocket-driver (0.7.3)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -301,22 +307,23 @@ PLATFORMS
 
 DEPENDENCIES
   anycable (> 1.0.99)
+  anycable-rack-server (~> 0.4.0)
   anycable-rails (> 1.0.99)
   bootsnap (>= 1.4.2)
   capybara
   cuprite
   listen
+  msgpack (~> 1.4)
   nanoid
-  pg (~> 1.0)
   pry-byebug
   pry-rails
   puma (~> 4.1)
   rails (~> 6.1)
-  redis (~> 4.0)
   rspec-rails (~> 4.0.0)
   rubocop-rails
   rubocop-rspec
   ruby-next (>= 0.10.0)
+  sqlite3 (~> 1.4)
   standard (~> 1.0)
   test-prof
   turbo-rails

Procfile.dev

@@ -0,0 +1,2 @@
+server: bundle exec rails s -p 3000
+assets: bundle exec bin/webpack-dev-server

README.md

@@ -12,59 +12,38 @@ This repository contains the code for AnyCable Rails demo application and its di
 
 ## Installation
 
-This app has a Docker-first configuration based one the [Ruby on Whales post](https://evilmartians.com/chronicles/ruby-on-whales-docker-for-ruby-rails-development).
+This branch has a minimal number of dependencies to make it easier to run the project locally: SQLite instead of Postgres, no Redis, no Docker.
 
-You need:
-
-- `docker` and `docker-compose` installed.
-
-For MacOS just use [official app](https://docs.docker.com/engine/installation/mac/).
-
-- [`dip`](https://github.com/bibendi/dip) installed.
-
-Run the following command to build images and provision the application:
+You need Ruby and NodeJS installed on your local machine (and maybe some common system deps for such gems as nokogiri and sqlite3).
 
 ```sh
-dip provision
+bundle install
+yarn install
+bin/setup
 ```
 
 ## Running
 
-You can start Rails server along with AnyCable by running:
+You can start Rails server by running:
 
 ```sh
-dip up rails anycable
+bundle exec rails s
 ```
 
 Then go to [http://localhost:3000/](http://localhost:3000/) and see the application in action.
 
-## Debugging
-
-If you want to run Rails server and/or with debugging capabilites, run the following commands:
-
-```sh
-# for Rails server
-dip rails s
-
-# for AnyCable
-dip anycable
-```
-
 ## Testing
 
-We separate unit and system specs and provide convenient Dip commands to run them:
+We use RSpec for testing:
 
 ```sh
-# only unit tests
-dip rspec
-
-# only system tests
-dip rspec system
+bundle exec rspec
 ```
 
+**NOTE:** System tests require Chrome browser to be installed on your machine (no other software required).
+
 ## Resources
 
-- [Ruby on Whales](https://evilmartians.com/chronicles/ruby-on-whales-docker-for-ruby-rails-development)—learn about the Docker development setup used for this application.
 - [RuboCoping with legacy](https://evilmartians.com/chronicles/rubocoping-with-legacy-bring-your-ruby-code-up-to-standard)—this is how we configure RuboCop.
 - [Evil Front](https://evilmartians.com/chronicles/evil-front-part-3)—some frontend ideas are borrowed from this post.
 - [Ruby Next](https://evilmartians.com/chronicles/ruby-next-make-all-rubies-quack-alike)—we're using the edge Ruby syntax!

config.ru

@@ -5,3 +5,4 @@
 require_relative "config/environment"
 
 run Rails.application
+Rails.application.load_server

config/anycable.yml

@@ -20,14 +20,22 @@ default: &default
   rpc_host: "127.0.0.1:50051"
   # Whether to enable gRPC level logging or not
   log_grpc: false
-  # Use Redis to broadcast messages to AnyCable server
-  broadcast_adapter: redis
+  # Use HTTP adapter for a quick start (since redis gem is not present in the project)
+  broadcast_adapter: http
   # Use the same channel name for WebSocket server, e.g.:
   #   $ anycable-go --redis-channel="__anycable__"
   redis_channel: "__anycable__"
 
 development:
   <<: *default
+  embedded: true
+  http_broadcast_url: "http://localhost:3000/_anycable_rack_broadcast"
+
+test:
+  <<: *default
+  http_broadcast_url: "http://localhost:3023/_anycable_rack_broadcast"
 
 production:
   <<: *default
+  # Use Redis in production
+  broadcast_adapter: redis