Faye

Faye, czyli łatwe pubsub z websockets

Transcript

1. faye
   czyli łatwe pub/sub z websockets
   

   View Slide

2. faye
   wiadomości pub/sub
   serwer: node.js / ruby (rack)
   backend: ram / redis
   klient: ruby / js
   fallback do long-polling
   

   View Slide

3. faye:
   archite
   ktura
   

   View Slide

4. faye + redis
   

   View Slide

5. private_pub
   gem dla Rails
   ułatwia używanie Faye
   prywatne kanały
   dwa tryby publikowania: json, eval
   

   View Slide

6. liveblogs
   tworzenie livebloga
   wysyłanie wiadomości
   wyświetlanie livebloga
   

   View Slide

7. 1 # Run with: rackup faye.ru -s thin -E production
   2 require "yaml"
   3 require "faye"
   4 begin
   5 require "private_pub"
   6 rescue LoadError
   7 require "bundler/setup"
   8 require "private_pub"
   9 end
   10
   11 PrivatePub.load_config("config/private_pub.yml",
   ENV["RAILS_ENV"] || "development")
   12 run Faye::RackAdapter.new(:mount => "/faye", :timeout =>
   45, :extensions => [PrivatePub.faye_extension])
   faye.ru
   

   View Slide

8. 1 development:
   2 server: "http://localhost:9292/faye"
   3 secret_token: "secret"
   4 test:
   5 server: "http://localhost:9292/faye"
   6 secret_token: "secret"
   7 production:
   8 server: "http://liveblogs.code-fu.pl:9292/faye"
   9 secret_token: "sekret ;)"
   config/private_pub.yml
   

   View Slide

9. 1 class Stream
   2 include Mongoid::Document
   3 include PrivatePub::ViewHelpers
   4
   5 belongs_to :user
   6 embeds_many :messages
   7
   ...
   24
   25 def create_message_and_publish(author, message)
   26 if self.active
   27 m = self.messages.create(a: author, m: message)
   28 publish_to "/streams/#{self.id}", m.to_json
   29 end
   30 end
   31 end
   app/models/stream.rb
   

   View Slide

10. 1 = subscribe_to "/streams/#{@stream.id}"
    2
    3 %ul#stream
    4 .new_messages
    5 .previous_messages
    6 - @messages.each do |message|
    7 = render 'liveblogs/message', :message => message
    8
    9 :javascript
    46 PrivatePub.subscribe("/streams/#{@stream.id}", function(data, channel) {
    47 data = jQuery.parseJSON(data);
    48 $(".new_messages").prepend("" +
    49 data.t.slice(11,16) + "\n" +
    50 "" + data.a + "\n" +
    51 data.m + "").children(":first").hide().fadeIn('slow');
    52 });
    app/views/liveblogs/show.html.haml
    

    View Slide

11. demo
    

    View Slide

12. publish_to + render
    <% publish_to "/messages/new" do %>
    $("#chat").append("<%= escape_javascript render(@messages) %>");
    <% end %>
    

    View Slide

13. pytania?
    http://faye.jcoglan.com/
    https://github.com/ryanb/private_pub
    http://liveblogs.code-fu.pl/
    http://speakerdeck.com/u/grk/p/faye
    

    View Slide