2008.5 제5회 루비세미나 발표

1. 루비 가 얼랭 에 빠진 날 http ://thinkr.egloos.com [email_address] 제 6 회 루비세미나 (2008.6.28)

2. Concurrency -oriented Programming

4. A Stateless Server Process -module(demo2). -compile(export_all). run() -> Pid = spawn(fun echo/0), Pid ! {self(), hello, 42}, receive {Pid, reply, 42} -> Pid ! stop end. echo() -> receive {From, hello, Val} -> From ! {self(), reply, Val}, echo(); % loop! stop -> io:format("Done!~n", []), ok end. P1 P2 {P1, hello, 42} {P2, reply, 42} Client Server stop

6. generic_server OTP gen_server 비헤비어

7. Apache vs. Yaws * http://www.sics.se /~joe/apachevsyaws.html

8. RE presentational S tate T ransfer

10. respond_to :wow! # POST /posts # POST /posts.xml def create @post = Post.new(params[:post]) respond_to do |format| if @post.save flash[:notice] = 'Post was successfully created.' format.html { redirect_to(@post) } format.xml { render :xml => @post, :status => :created, :location => @post } else format.html { render :action => "new" } format.xml { render :xml => @post.errors, :status => :unprocessable_entity } end end end

11. GoogleTrends “ ruby on rails ” 1.0 1.2 2.0 resource 도입 from MVC to REST

12. The RADAR Architecture * RESTful Application, Dumb-Ass Recipient ( http://pragdave.pragprog.com/pragdave/2007/03/the_radar_archi.html )

13. Time to Relax…

15. SQL vs. CouchDB * http ://www.zefhemel.com/archives/2008/03/11/sittin-on-the-couchdb Static queries of dynamic schemas Dynamic queries of static schemas Must know only document name Must know schema to read/write a complete object Denormalized. Docs usually self contained. Data often duplicated. Normalized. Objects spread across tables. Duplication reduced. Collection of named documents with varying structure Uniform tables of data Dynamic, implicit schema Predefined, explicit schema CouchDB SQL

16. Document = JSON Object { "_id":"discussion_tables", "_rev":"D1C946B7", "Subject":"I like Planktion", "Author":"Rusty", "PostedDate":"2006-08-15T17:30:12-04:00", "Tags":["plankton", "baseball", "decisions"], "Body":"I decided today that I don't like baseball. I like plankton." }

19. DEMO

20. Admin Interface

21. Ruby View

22. Extending ARes class CouchResource < ActiveResource::Base class << self def element_path(id, prefix_options = {}, query_options = nil) &quot;#{prefix(prefix_options)}#{collection_name}/#{id}#{query_string(query_options)}&quot; def collection_path(prefix_options = {}, query_options = nil) &quot;#{prefix(prefix_options)}#{collection_name}#{query_string(query_options)}&quot; def instantiate_collection(collection, prefix_options = {}) collection = collection.fetch(&quot;rows&quot;) if collection.kind_of? Hash def instantiate_record(record, prefix_options = {}) record = record.fetch(&quot;value&quot;) if record.has_key? &quot;value“ def find_view(view_name, func_name) find(:all, :from => &quot;/#{element_name}/_view/#{view_name}/#{func_name}&quot;) end

23. Mywiki Resource class Mywiki < CouchResource self.site = &quot;http://localhost:5984&quot; self.format = :json self.collection_name = 'mywiki' # used as a database name self.primary_key = '_id' end

24. Console Result

25. Finish!!