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![Use complex messages and channels (1) class RsvpController < WebsocketRails::BaseController ... def rsvp @rsvp_yes_count += 1 if message[:attending] rsvp = { :yes => @rsvp_yes_count } WebsocketRails[:rsvp].trigger 'new', rsvp end end](https://image.slidesharecdn.com/websocketonrails-120910090802-phpapp02/75/Websocket-on-Rails-23-2048.jpg)
Uploaded byJeroen Rosenberg
Websocket on Rails
This document introduces websocket-rails, a gem for building real-time web applications using websockets in Ruby on Rails. It allows asynchronous full-duplex communication by using websockets instead of traditional HTTP requests. The gem maps websocket events to controller actions, and controllers can then trigger events that are broadcast to clients. This enables features like pushing new data to only interested clients in real-time. Code examples demonstrate setting up websocket-rails, defining event mappings and controllers, and binding to events from the client-side.
Websocket on Rails
- 1. Websocket on rails Buildingrealtime webapps
- 3. I'm a Java Developer wholikes to ride the rails!
- 4. The future isnow!
- 5. What's so great aboutWebsocket?
- 6.
- 7. Asynchronous full-duplex communication Websocketis asynchronous & full-duplex
- 8. So, a littleless of this...
- 9. So instead ofthis... Or this...
- 10.
- 11. You tell me...what's new?
- 12.
- 13. So, how toride the rails with this?
- 14. Introducing websocket-rails 1. echo "gem 'thin'" >> Gemfile 2. echo "gem 'websocket-rails'" >> Gemfile 3. bundle install 4. rails g websocket_rails:install
- 16.
- 18. Map events tocontroller actions WebsocketRails::EventMap.describe do # You can use this file to map incoming events to controller actions. # One event can be mapped to any number of controller actions. The # actions will be executed in the order they were subscribed. namespace :rsvp do subscribe :new, :to => RsvpController, :with_method => : rsvp end end
- 19. Use rails-like controllers classRsvpController < WebsocketRails::BaseController def initialize_session # initialize application scoped variables here @rsvp_yes_count = 0 end def rsvp @rsvp_yes_count += 1 if message broadcast_message :new_rsvp, @rsvp_yes_count end end
- 20. Trigger and bindto events in the client $ -> dispatcher = new WebSocketRails('localhost:3000/websocket') dispatcher.on_open = (data) -> console.log "Connection has been established: #{data}" $('#rsvp_yes').bind 'click', (message) => dispatcher.trigger 'rsvp.new', true dispatcher.bind 'new_rsvp', (rsvp_yes_count) => $('#rsvp_yes_count').html rsvp_yes_count
- 21.
- 22. ...only push towhom is interested
- 23. Use complex messagesand channels (1) class RsvpController < WebsocketRails::BaseController ... def rsvp @rsvp_yes_count += 1 if message[:attending] rsvp = { :yes => @rsvp_yes_count } WebsocketRails[:rsvp].trigger 'new', rsvp end end
- 24. Use complex messagesand channels (2) $ -> dispatcher = new WebSocketRails('localhost:3000/websocket') $('#rsvp_yes').bind 'click', (message) => rsvp = attending: true dispatcher.trigger 'rsvp.new', rsvp channel = dispatcher.subscribe 'rsvp' channel.bind 'new', (rsvp) => $('#rsvp_yes_count').html rsvp.yes
- 25.
- 26. References Websocket spec ● http://dev.w3.org/html5/websockets/ Websocket-railsproject page ● http://danknox.github.com/websocket-rails/ My project ● https://github.com/jeroenr/followup Ruby eventmachine ● http://rubyeventmachine.com/