My talk at MerbCamp in San Diego. I'll apologize up front. ;)

1. hi

2. Expanding
Our Vision With
MERB

3. Advanced
MERB

4. Advanced
MERB

5. Adventurous
MERB

6. INTRODUCTION

7. Matt Todd

8. mtodd
http://github.com/mtodd/
Halcyon
Highgroove
Studios
Developer & OSS Architect
http://highgroove.com

10. SWEET
NECTAR
OF THE
GODS

11. EXPECTATIONS

12. I AM NOT
AN EXPERT

13. WARNING
code for:
PROBLEMS
& examples

14. lack of
imagination

16. The
Foreground

17. “forefront, prominent
or important position”

18. meh

20. not as interesting
as the background

22. :o

24. The
Background

25. DBs
Caches
Background Processes
Web Services
Embedded Components
Distributed Grid/Mesh Apps
AJAX
Rack

26. DBs x
Caches x
Background Processes √
Web Services √
Embedded Components √
Distributed Grid/Mesh Apps √
AJAX x
Rack √

27. Background
Processes

28. rake tasks

29. namespace(:nodes) do
desc quot;Purge inactive nodes.quot;
task :purge => [:merb_env] do
Node.inactive.purge
end
desc quot;Scan for nodesquot;
task :scan => [:merb_env] do
Node.detach_and_scan(Node.first)
end
end

30. render_then_call
run_later

31. render_then_call do
Node.inactive.purge
end
### OR
run_later do
Node.scan(Node.first)
end
render

32. we’ll talk later

33. Web
Services

34. “software system designed
to support interoperable
machine-to-machine
interaction over a network”

35. a service
over the web
just for apps

36. JSON is
REALLY
Awesome

37. JSON is
FUCKING
Awesome

38. {“foo”:“bar”}

39. RESTful

40. GET /objects.json index
PUT /objects.json create
GET /objects/1.json show
DELETE /objects/1.json delete
POST /objects/1.json update

41. Merb’s Way

42. provides
render
display

43. provides

44. class Posts < Application
1. provides :json
def show
@post = Post.get(params[:id])
display @post
end
end

45. NO BITCH!
GIMME XML!

46. GET /posts/1.xml
406 Not Acceptable

47. display

48. class Posts < Application
1. provides :json
def show
@post = Post.get(params[:id])
2. display @post
end
end

49. respond_to do |format|
format.html { render }
format.json { @post.to_json }
end
Rails
vs
case content_type Merb
when :html
render
when :json
display @post
end

51. even better:

52. renders XML, JSON, and HTML
provides :json, :xml
@post = Post.get(params[:id])
display @post
AUTOMATICALLY
fuck yeah!

53. Embedded
Components

55. <script type=“text/javascript”
src=“/comments.js”></script>

56. document.write(
‘<div id=“comments”></div>’
);
$(function(){
<% @comments.each do |c|
c = $(“<p><%=c.body%></p>”);
c.attr(‘id’,“comment-<%=c.id%>”);
c.appendTo(‘#comments’);
<% end %>
});

57. github.com/
mtodd/aceldama

58. glorified JS
& AJAX

59. Distributed
Grid/Mesh
Apps

62. Centralized
S
S S
M
S S

63. Distributed
N
N N
N N

64. {
S
M
slave
master
N node

65. Foreground
`
/sites
N
[{id:1, [{id:1,
url:“http://github.com/”, rating:1,
created_at:...},...] created_at:...},...]
/sites.json /sites/n/reports.json
Background

66. github.com/
mtodd/conley

67. Rack

76. AWESOME

77. Framework’s
Framework

78. Request Merb
Middleware
Rack
Response
Mongrel

79. mongrel
thin
ebb
webrick
etc

80. class YourApp
def call(env)
[
200,
{‘Content-Type’=>‘text/plain’},
“OK”
]
end
end

81. Middleware

82. mini apps
modifies env
avoid passing
through

83. class RackMiddlewareExample
def initialize(app)
@app = app
end
def call(env)
# voodoo
@app.call(env)
end
end

84. gist.github.com/
16369

85. Fin.

86. HAHA