jRuby and TorqueBox

+ =

Christopher Spring
Thursday 07 February 13

@autonomous
chris.spring@gmail.com


“Java is a DSL for
converting large XML
files into Stack Traces”

@ davetron5000

... and that’s all I have to
say about that


Structure


jRuby

Core Java Bytecode
Parser
Classes Integ JIT

JVM

Native
Threads GC C API
JIT

Charles Nutter - Euroko2012

jRuby

Core Java Bytecode
Parser
Classes Integ JIT


“We could stop working
on jRuby and it would
continue to get faster.”


Performance


require 'benchmark'

def fib(n)
return 1 if n < 2
fib(n - 2) + fib(n - 1)
end

arr = []
puts Benchmark.measure{
40.times{ |i| arr << fib(i) }
}
puts arr.inspect
# [1, 1, 2, 3, 5, 8, 13, 21, ... ]


Time in seconds
60
52.8
45

30

15

0


Time in seconds
60
52.8
45

30

15
10.4

0


REE - 183.8
Time in seconds
60
52.8
45

30

15
10.4

0


get '/' do
1_000.times do
MultiJson.encode({
one: 'one',
date: Date.today,
two: 2
})
end
end

# ruby jsonator.rb -s Puma


ab -n 1000 -c 32 http://localhost:4567/


Time in seconds
30
24.946
22,5

15

7,5

0


Time in seconds
30
24.946
22,5

15

8.489
7,5

0


Time in seconds
30
24.946
22,5

15

8.489
7,5
2.892
0


Runtime optimizations


method_one method_two method_three


Threading


vs.


• No GIL
• Native threads
• One process for all cores


Concurrency threshold

100 process system

vs.
100 thread system


Java Libraries


<html><head>
<style type="text/css">
body{
font-family: sans-serif;
text-align: center;
background-color: #efefef;
}
h1{ color: blue; font-weight: bold;}
div{
border: 4px dashed red;
padding: 2em;margin: 2em;
}
</style>
</head>
<body>
<h1>PDFs with Flying Saucer and jRuby</h1>
<div>
<p>I'm a lumberjack, and I'm ok...</p>
<img src="flower.jpeg"></img>
</div>
</body>
</html>

require 'stringio'
require 'itext'
require 'flying_saucer'

io = StringIO.new
content = File.read('example.html')

renderer = org.xhtmlrenderer.pdf.ITextRenderer.new
renderer.set_document_from_string(content)
renderer.layout
renderer.create_pdf(io.to_outputstream)

File.write('pdf_result.pdf', io.string)


html


pdf


A loads more....!!!

• Choice of GC
• Cross platform
• GUI apps
• Great tooling
• Massive ecosystem


Let’s take a step back...


Your App


Your App

Background
Jobs


Your App

Background Scheduled
Jobs Jobs


Your App

Background Scheduled
Jobs Jobs

Cron


TorqueBox


TorqueBox
App1

App2

App3


TorqueBox

App1

App2

App3


TorqueBox
Background Async.
App1
App2 Tasks Messages
App3
Scheduled Long running
Tasks services


TorqueBox
Background Async.
App1
App2 Tasks Messages
App3
Scheduled Long running
Tasks services

JBoss AS

Clustering Load balancing High availability


Some of the toys...

• HornetQ
• Inﬁnispan
• Quartz Scheduler


It’s still just
business as usual


Asynchronous
Stuffs


class Charge < ActiveRecord::Base
# id :integer not null, primary key
# cents :integer default(0)
# state :string(255) default("pending")
end


class ChargesController < ActionController::Base
include TorqueBox::Injectors
def create
@charge = Charge.create( params[:charge] )
fetch('/queue/charges').publish( @charge.id )
msg = 'Slaves turtles doing thy bidding'
redirect_to( charges_url, notice: msg )
end
end


'/queue/charges' ChargeProcessor

class ChargesController < ActionController::Base
def create
@charge = Charge.create( params[:charge] )
msg = 'Slaves turtles doing thy bidding'
redirect_to( charges_url, notice: msg )
end
end



# config/torquebox.rb
TorqueBox.configure do

queue '/queue/charges' do
processor ChargeProcessor
end

end


# app/processors/charge_processor.rb
class ChargeProcessor < TorqueBox::Messaging::MessageProcessor
def on_message( charge_id )
# ...
end

def on_error( exception )
# optionally deal with exception
# ...
end
end


@charge = Charge.find( charge_id )
result = PaymentGateway.process( @charge )
generate_receipt if result.success?
broadcast_status
end

end


broadcast_status
end

def generate_receipt
fetch('queue/receipts').publish( @charge.id )
end

end


broadcast_status
end

def generate_receipt
fetch('queue/receipts').publish( @charge.id )
end

def broadcast_status
fetch('topics/charge_status').publish( @charge.id )
end
end


Queue Processor

Processor

Topic Processor

Processor


TorqueBox.configure do
queue '/queue/charges' do
# processors/charge_processor.rb
processor ChargeProcessor
end

topic '/topic/charge_status' do
processor StatusProcessor
processor TesterProcessor
processor AlertAdminProcessor
end
end


And WebSockets?


Hells yes!!


Stomplet

Topic/Queue Client

Processor


Stomplet

‘/stomp/statuses’

Topic/Queue Client

Processor


Stomplet

‘/topics/charge_status’ ‘/stomp/statuses’

Topic/Queue Client

Processor


stomplet ChargeStatusStomplet do
route '/stomp/status'
end


# app/stomplets/charge_status_stomplet
class ChargeStatusStomplet < TorqueBox::Stomp::JmsStomplet
def on_subscribe( client )
topic = destination_for('/topics/charge_status', :topic)
subscribe_to( client , topic )
end

# configure(config)
# destroy()
# on_subscribe(subscriber)
# on_unsubscribe(subscriber)
# on_message(message)
end


javascript_include_tag '/stilts-stomp'


module ApplicationHelper
def stomp_url
inject('stomp-endpoint')
end
end

var stompUrl = '#{stomp_url}'

$( function() {
if (stompUrl) {
var client = Stomp.client(stompUrl);

client.connect( username, password, function() {
client.subscribe( '/stomp/status', function(msg) {
alert(msg.body);
});
});
}
});

Thanks for Listening!


Questions?


jRuby and TorqueBox

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