Toronto Ruby Brigade Notes for July 10th, 2012 by David Andrews

gistfile1.txt

SOA 
===================================== 
Pitr
works at Uken Games (team of about 20 people) doing MMO mobile games 

been there for about a year 
Noticed things were not DRY 
refactored common elements from existing games: 
authentication 
payments 
push notifications 
workers 
cross-promotion 
analytics 
feedback (contact us) 

first attempted through a library 
found that it was not powerful enough 

New goals were generated: 
must be: 
Modular 
DRY 
support TDD 
be Scalable 

fast iterative updates to each service 
state machines have been very useful in certain cases 

Things to explore: 
Couchbase - couchdb and memcache together 
JSON API for connections - APIs are versioned 
RabbitMQ (for internal queues - user actions) 
Resque versus Sidekick 

JRuby 
============================================== 
Tasveer Singh 
Zenapsis 
(background is in cognitive linguistics) 

Why do I need it? 
Isn't it for Performance? 
Doesn't it introduce bugs and inconsistencies? 

Puma web server - JRuby 1.7 
Unicorn second best 

JVM - continues to improve 
optimizations 
Mixed mode - interpreted and compiled 
runs the profiler at startup 
such as: 
method inlining 
loop unrolling 
dead code elimination 
duplicate code elimination 

other benefits: 
compilation - JIT (@ 50 calls) 
configurable 
generational/concurrent/tuneable garbage collection 

jvisualvm 

concurrency - multiple Java threads spawned by one app 
context switching (for free) 
time slicing 
processor affinity 
thread safety 
check out: Jruby_ThrEach 

JVM Languages 
Mix and match 
Embedded JARs 
Java ecosystem 

Interesting projects: 
Ruboto - android apps with Ruby 
Ruby motion 
vert.x 

Deployment: 
Trinidad 
Puma - new kid on the block - significantly faster (Engine Yard) 
TorqueBox - based on JBoss (RedHat) 
Warbler - "web application resource" - Jruby -> WAR conversion 

TorqueBox - based on JBoss 
has web, messaging, scheduling and services support 
supports sinatra and rails 

Things to consider: 
Passenger - at full load it segfaults 
Jruby doesn't 
options in terms of languages 
they use backbone.js 

https://github.com/zenapsis/carrierwave_imagevoodoo 

for testing you can run it on a faster VM 

[Notes compiled by David Andrews, Ryatta Group]