Introduction to Ruby MagLev

An introduction to Maglev Rudi Engelbrecht Ruby Conf - 17 June 2011lautus

MagLev Conceptslautus MiniRubyConf

MagLev Concepts • Root Objectlautus MiniRubyConf

MagLev Concepts • Root Object • Persistency by Reachabilitylautus MiniRubyConf

MagLev Concepts • Root Object • Persistency by Reachability • (transitive closure)lautus MiniRubyConf

MagLev Concepts • Root Object • Persistency by Reachability • (transitive closure) • Repository (Stone)lautus MiniRubyConf

MagLev Concepts • Root Object • Persistency by Reachability • (transitive closure) • Repository (Stone) • Virtual Machines (Gems)lautus MiniRubyConf

MagLev Concepts • Root Object • Persistency by Reachability • (transitive closure) • Repository (Stone) • Virtual Machines (Gems) • local vs remote gemslautus MiniRubyConf

MagLev Concepts • Root Object • Persistency by Reachability • (transitive closure) • Repository (Stone) • Virtual Machines (Gems) • local vs remote gems • Garbage Collectorlautus MiniRubyConf

Ruby VM Ruby VM Shared Page Repository CacheRuby VMRuby VM

TwitterClone class Person def remove_follower(person) @followers.delete(person) attr_accessor :username, :followers end def initialize(username) def to_s @username = username result = "@#{@username} --> @followers = Array.new [#{@followers.size}]" end @followers.each {|f| result = result + " #{f.username}" } def add_follower(person) result @followers << person end end endlautus MiniRubyConf

TwitterClone Maglev.persistent do require person end Maglev::PERSISTENT_ROOT[:persons] = Array.new Maglev.commit_transactionlautus MiniRubyConf

person.rb

person.rbperson.rb

:persons Array person.rbperson.rb

:persons Array :persons Array person.rb person.rbperson.rb

TwitterClone require person dhh = Person.new("dhh") persons = obie = Person.new("obie") Maglev::PERSISTENT_ROOT[:persons] unclebob = Person.new("unclebob") noob1 = Person.new("noob1") persons << dhh noob2 = Person.new("noob2") persons << obie persons << unclebob dhh.add_follower(obie) dhh.add_follower(unclebob) Maglev.commit_transaction obie.add_follower(unclebob) unclebob.add_follower(noob1) unclebob.add_follower(noob2)lautus MiniRubyConf

:persons Array :persons Array

:persons Arraydhh :persons Array

:persons Arraydhh obie :persons Array

:persons Arraydhh obie :persons unclebob Array

:persons Arraydhh obie :persons unclebob Array noob1

:persons Arraydhh obie :persons unclebob Array noob1 noob2

:persons Arraydhh obie :persons unclebob Array noob1 dhh obie noob2 unclebob noob1 noob2

TwitterClone persons = Maglev::PERSISTENT_ROOT[:persons] persons.each {|p| puts p}lautus MiniRubyConf

TwitterClonelautus MiniRubyConf

TwitterClone • Multiple VM’slautus MiniRubyConf

TwitterClone • Multiple VM’s • Concurrent access - MVCClautus MiniRubyConf

TwitterClone • Multiple VM’s • Concurrent access - MVCC • First commit winslautus MiniRubyConf

TwitterClone2 def add_follower(person) class Person @followers << person attr_accessor :username, :email, :followers, :following end def initialize(username) def remove_follower(person) @username = username @followers.delete(person) @email = username + "@mail.com" end @followers = Array.new @following = Array.new def to_s end result = "@#{@username} --> [#{@following.size} : #{@followers.size}]" def follows(person) result = result + " following: {" @following << person @following.each {|f| result = result + " #{f.username}"} person.add_follower(self) result = result + " }" end result = result + " followed by: {" @followers.each {|f| result = result + " #{f.username}"} def unfollows(person) result = result + " }" @following.delete(person) result person.remove_follower(self) end end endlautus MiniRubyConf

TwitterClone2 Maglev.persistent do require person end Maglev::PERSISTENT_ROOT[:persons] = Array.new Maglev.commit_transactionlautus MiniRubyConf

TwitterClone2 require person dhh = Person.new("dhh") obie = Person.new("obie") unclebob = Person.new("unclebob") noob1 = Person.new("noob1") noob2 = Person.new("noob2") obie.follows(dhh) unclebob.follows(dhh) unclebob.follows(obie) noob1.follows(unclebob) noob2.follows(unclebob) persons = Maglev::PERSISTENT_ROOT[:persons] persons << dhh persons << obie persons << uncleboblautus MiniRubyConf

TwitterClone2 persons = Maglev::PERSISTENT_ROOT[:persons] persons.each {|p| puts p}lautus MiniRubyConf

MagLevlautus MiniRubyConf

MagLev • Concurrent access to objects in distributed VM’slautus MiniRubyConf

MagLev • Concurrent access to objects in distributed VM’s • Rabbit in hat tricklautus MiniRubyConf

MagLev • Concurrent access to objects in distributed VM’s • Rabbit in hat trick • Proc’s can be persistedlautus MiniRubyConf

MagLev • Concurrent access to objects in distributed VM’s • Rabbit in hat trick • Proc’s can be persisted • references enclosing environment’s variableslautus MiniRubyConf

Dinnerlautus MiniRubyConf

Dinner • Enjoy!lautus MiniRubyConf

Introduction to Ruby MagLev

by rengelbrecht on Jun 19, 2011

Accessibility

Categories

Tags

Upload Details

Usage Rights

2 Embeds 2

Statistics

Introduction to Ruby MagLev — Presentation Transcript

https://twitter.com	1
http://twitter.com	1