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Crank Up Your Apps With TorqueBox

  1. 1. Crank Up Your Apps With Jim Crossley MagicRuby Creative  Commons  BY-­SA  3.0 Feb 2011 1
  2. 2. Jim  who? • “recovering  java  architect” • java  since  ’96,  ruby  since  ’06 • emacs  and  guitars  since  forever • Red  Hat  Senior  Engineer   • proud  member  of 2
  3. 3. 3
  4. 4. Bob  McWhirter 4
  5. 5. Agenda • High-­level  BS  and  Development   Process • Web,  Messaging,  Scheduling,   Services,  Clustering 5
  6. 6. TorqueBox the power of JBoss with the expressiveness of Ruby 6
  7. 7. TorqueBox:  what? • A  “real”  app  server  for  Ruby • Founded  in  2008 • Bob’s  “labor  of  love” • 100%  open-­source,  LGPL  license • Reflects  a  strong  commitment  to   Ruby  from  Red  Hat 7
  8. 8. TorqueBox:  why? • “Native”  support  for  Rack  apps • Built-­in  background  processing • Built-­in  scheduling • Built-­in  clustering • Easily  scalable • Optionally  enterprisey 8
  9. 9. JRuby a good idea done well 9
  10. 10. JRuby:  why? • Very  fast  runtime • Real  threads • Java  libraries • Java  tools • Healthy  community 10
  11. 11. JRuby:  why  not? • Slower  start  up • Native  gems • FFI • C  extension  support • Some  Ruby  libs  not  thread-­safe 11
  12. 12. JBoss  AS but before we get to that... 12
  13. 13. Enterprise  Java misconceptions 13
  14. 14. Is it Scary? 14
  15. 15. Acronymious? WAR JAXBEAR JSTL SLSB JSF JNLPJTA JPA   JNI JCK JAX-­RPC JDOM JAXP JAX-­WS JSE JEE JMM JTS JWS NIO JDO AWT   JMX JLS JAR JRE JCP   JSR JNDI JSP SAF EJB JME POJO JMSJDBC   JDK JVM JAX-­RS JPQL NPE 15
  16. 16. Bloated? 16
  17. 17. Bewildering? 17
  18. 18. Enterprise  Java  is  all  that and more! but... 18
  19. 19. I  promise... • No  XML   • No  Java  * • No  war  files  * • Only  Ruby,  YAML  and... * Unless you really want to 19
  20. 20. JBoss  AS the enterprisey good parts 20
  21. 21. JBoss  AS6 • Tomcat  for  web • Infinispan  for  caching • HornetQ  for  messaging • Quartz  for  scheduling • mod_cluster  for  clustering 21
  22. 22. AS  =  Application  Server • Not  just  “web  server  +  interpreter” • More  like  initd  than  httpd • Can  host  multiple,  disparate  apps   simultaneously • Provides  basic  services  to  all  the   apps  it  hosts 22
  23. 23. Hot  Deployment $JBOSS_HOME/server/default/deploy/ • anything  added  to  deploy/   will  get  deployed • anything  removed  from   deploy/  will  get   undeployed • anything  updated  in   deploy/  will  get  redeployed • TorqueBox  deployers   make  JBoss  grok  YAML   and  ruby  archives 23
  24. 24. Hot  Deployment $JBOSS_HOME/server/default/deploy/ • deployment   anything  added  to  deploy/   will  get  deployed descriptors • anything  removed  from   deploy/  will  get   undeployed • anything  updated  in   deploy/  will  get  redeployed • TorqueBox  deployers   make  JBoss  grok  YAML   and  ruby  archives 24
  25. 25. Hot  Deployment $JBOSS_HOME/server/default/deploy/ • anything  added  to  deploy/   will  get  deployed • anything  removed  from   deploy/  will  get   undeployed • anything  updated  in   zip  files   deploy/  will  get  redeployed • (archives) TorqueBox  deployers   make  JBoss  grok  YAML   and  ruby  archives 25
  26. 26. Development  Process how do they work? 26
  27. 27. easy  install $  wget  http://torquebox.org/torquebox-­dev.zip $  unzip  torquebox-­dev.zip $  export  TORQUEBOX_HOME=$PWD/torquebox-­1* $  export  JBOSS_HOME=$TORQUEBOX_HOME/jboss $  export  JRUBY_HOME=$TORQUEBOX_HOME/jruby $  export  PATH=$JRUBY_HOME/bin:$PATH 27
  28. 28. easy  install $  wget  http://torquebox.org/torquebox-­dev.zip $  unzip  torquebox-­dev.zip $  export  TORQUEBOX_HOME=$PWD/torquebox-­1* $  export  JBOSS_HOME=$TORQUEBOX_HOME/jboss $  export  JRUBY_HOME=$TORQUEBOX_HOME/jruby $  export  PATH=$JRUBY_HOME/bin:$PATH 28
  29. 29. easy  install $  wget  http://torquebox.org/torquebox-­dev.zip $  unzip  torquebox-­dev.zip $  export  TORQUEBOX_HOME=$PWD/torquebox-­1* $  export  JBOSS_HOME=$TORQUEBOX_HOME/jboss $  export  JRUBY_HOME=$TORQUEBOX_HOME/jruby $  export  PATH=$JRUBY_HOME/bin:$PATH 29
  30. 30. easy  install $  wget  http://torquebox.org/torquebox-­dev.zip $  unzip  torquebox-­dev.zip Make  sure  the  jruby   found  in  your  path  is  in   $JRUBY_HOME/bin. $  export  TORQUEBOX_HOME=$PWD/torquebox-­1* $  export  JBOSS_HOME=$TORQUEBOX_HOME/jboss $  export  JRUBY_HOME=$TORQUEBOX_HOME/jruby $  export  PATH=$JRUBY_HOME/bin:$PATH 30
  31. 31. easy  install $  jruby  -­S  gem  install  bundler $  jruby  -­S  gem  install  rails $  jruby  -­S  gem  install  sinatra 31
  32. 32. rake  tasks Rakefile require  "org.torquebox.rake-­support" 32
  33. 33. rake  tasks rake  torquebox:run        Run  TorqueBox  server rake  torquebox:deploy[context_path]        Deploy  the  app  in  the  current  directory rake  torquebox:undeploy        Undeploy  the  app  in  the  current  directory 33
  34. 34. rake  tasks Start  torquebox:run  in  its  own   shell  and  leave  it  running.  Instead   of  script/server  or  shotgun   or  thin  or  whatever  else,   use  torquebox:deploy. 34
  35. 35. deployment  descriptors torquebox:deploy  creates   a  deployment  descriptor  in  the   JBoss  deploy/  directory 35
  36. 36. deployment  descriptors deploy/myapp-­{rails,rack}.yml application: root: /path/to/myapp env: development web: context: myapp host: www.yourhost.com static: public rackup: config.ru environment: MAIL_HOST: mail.yourhost.com REPLY_TO: you@yourhost.com 36
  37. 37. deployment  descriptors deploy/myapp-­{rails,rack}.yml application: root: /path/to/myapp env: development web: context: myapp The  fully-­qualified   host: www.yourhost.com path  to  the  app.     static: public This  will  be  the  value   rackup: config.ru environment: of  either   RAILS_ROOT  or   MAIL_HOST: mail.yourhost.com REPLY_TO: you@yourhost.com RACK_ROOT 37
  38. 38. deployment  descriptors deploy/myapp-­{rails,rack}.yml application: root: /path/to/myapp env: development web: context: myapp host: www.yourhost.comThe  runtime  mode  of   static: public the  app.    This  will  be   rackup: config.ru environment: either  RAILS_ENV   MAIL_HOST: mail.yourhost.comor  RACK_ENV REPLY_TO: you@yourhost.com 38
  39. 39. deployment  descriptors The  app’s  context  path   deploy/myapp-­{rails,rack}.yml (or  “sub  URI”): http://localhost:8080/myapp application: Can  be  set  via  rake: root: rake  torquebox:deploy[myapp] /path/to/myapp env: development The  default  is  root: web: http://localhost:8080/ context: myapp host: www.yourhost.com static: public rackup: config.ru environment: MAIL_HOST: mail.yourhost.com REPLY_TO: you@yourhost.com 39
  40. 40. deployment  descriptors deploy/myapp-­{rails,rack}.yml application: root: /path/to/myapp A  list  of  virtual   env: development hostnames  to  which   web: to  bind  the  app. context: myapp host: www.yourhost.com static: public rackup: config.ru environment: MAIL_HOST: mail.yourhost.com REPLY_TO: you@yourhost.com 40
  41. 41. deployment  descriptors deploy/myapp-­{rails,rack}.yml application: root: /path/to/myapp env: development web: The  location  of  the   context: myapp app’s  static   host: www.yourhost.com content,  either   static: public absolute  or  relative   rackup: config.ru to  the  app’s  root. environment: MAIL_HOST: mail.yourhost.com REPLY_TO: you@yourhost.com 41
  42. 42. deployment  descriptors deploy/myapp-­{rails,rack}.yml application: root: /path/to/myapp env: development web: The  name  of  the   context: myapp rackup  script  used  to   host: www.yourhost.com boot  your  app static: public rackup: config.ru environment: MAIL_HOST: mail.yourhost.com REPLY_TO: you@yourhost.com 42
  43. 43. deployment  descriptors deploy/myapp-­{rails,rack}.yml application: root: /path/to/myapp env: development Any  environment   web: variables  required   context: myapp by  the  app. host: www.yourhost.com static: public rackup: config.ru environment: MAIL_HOST: mail.yourhost.com REPLY_TO: you@yourhost.com 43
  44. 44. deployment  descriptors • config/torquebox.yml   • internal  descriptors  have  the   same  structure  as  the   external  ones  in  deploy/ • may  be  used  to  provide  your   own  reasonable  defaults 44
  45. 45. Web make rack, not war 45
  46. 46. jruby-­rack • All  rack-­based  frameworks   supported:  rails,  sinatra,  etc • No  packaging  required:  apps  deploy   from  where  they  sit  on  disk • No  redeploy  necessary  to  see   changes  when  using  rack  reloading   or  rails  development  mode 46
  47. 47. database  connectivity Gemfile gem  "activerecord-­jdbc-­adapter" gem  "jdbc-­postgres" #  gem  "jdbc-­sqlite3" #  gem  "jdbc-­mysql" 47
  48. 48. rails  template • Adds  TorqueBox  rake  tasks • Adds  the  JDBC  sqlite3  gems • Adds  TorqueBox  session_store • Adds  Backgroundable  module 48
  49. 49. my  first  rails  app $  jruby  -­S  rails  new  myapp  -­m          $TORQUEBOX_HOME/share/rails/template.rb $  cd  myapp $  jruby  -­S  bundle  install $  jruby  -­S  rake  torquebox:deploy 49
  50. 50. Messaging asynchronicity 50
  51. 51. lots  of  options RabbitMQ Resque cron BackgroundDRb workling CronEdit BackgroundJob Kestral rufus-scheduler JobFu Ap4r Amazon SQS async_observer Taskr Sparrow Background-Fu beanstalkd DelayedJob RailsCron Open4 Conveyor WorkerQueue daemons rake ActiveMQ starling Spawn ActiveMessaging 51
  52. 52. TorqueBox::Messaging • JMS  (Java  Message  Service)   is  an  API  for  messaging • implementation HornetQ  is  the  JBoss  JMS   52
  53. 53. TorqueBox::Messaging • Task • Backgroundable • MessageProcessor • Queue • Topic 53
  54. 54. TorqueBox::Messaging • No  extra  tables  in  your  database • No  external  system  to  manage • Little  to  no  config  required  at  all • No  redeploy  necessary  in  dev  mode • Efficient  loading  of  rails  environment • Automatic  load  balancing  and  retries • Works  on  Windows,  if  you  care 54
  55. 55. Tasks app/tasks/email_task.rb class  EmailTask  <  TorqueBox::Messaging::Task    def  welcome(payload)        person  =  payload[:person]          person  ||=  Person.find_by_id(payload[:id])        if  person            #  send  the  email            person.welcomed  =  true            person.save!        end    end end 55
  56. 56. Tasks app/tasks/email_task.rb class  EmailTask  <  TorqueBox::Messaging::Task    def  welcome(payload)        person  =  payload[:person]          person  ||=  Person.find_by_id(payload[:id])        if  person            #  send  the  email            person.welcomed  =  true            person.save!        end    end end 56
  57. 57. Tasks app/tasks/email_task.rb class  EmailTask  <  TorqueBox::Messaging::Task    def  welcome(payload)        person  =  payload[:person]          person  ||=  Person.find_by_id(payload[:id])        if  person            #  send  the  email            person.welcomed  =  true            person.save!        end    end end 57
  58. 58. Tasks app/tasks/email_task.rb class  EmailTask  <  TorqueBox::Messaging::Task    def  welcome(payload)        person  =  payload[:person]          person  ||=  Person.find_by_id(payload[:id])        if  person            #  send  the  email            person.welcomed  =  true            person.save!        end    end end 58
  59. 59. Tasks app/tasks/email_task.rb class  EmailTask  <  TorqueBox::Messaging::Task    def  welcome(payload)        person  =  payload[:person]          person  ||=  Person.find_by_id(payload[:id])        if  person            #  send  the  email            person.welcomed  =  true            person.save!        end    end end 59
  60. 60. Tasks app/controllers/people_controller.rb class  PeopleController  <  ApplicationController    def  create        @person  =  Person.new(params[:person])        respond_to  do  |format|            if  @person.save                EmailTask.async(:welcome,  :id  =>  person.id)                #  respond  appropriately            end        end    end end 60
  61. 61. Tasks app/controllers/people_controller.rb class  PeopleController  <  ApplicationController    def  create        @person  =  Person.new(params[:person])        respond_to  do  |format|            if  @person.save                EmailTask.async(:welcome,  :id  =>  person.id)                #  respond  appropriately            end        end    end end 61
  62. 62. Tasks Call  them  from  your   controllers,  models,  and   observers,  or  even  other   tasks.  Even  in  non-­Rails   apps! 62
  63. 63. Backgroundable Inspired  by  DelayedJob’s   handle_asynchronously,   it’s  trivial  to  create  implicit   background  Tasks. 63
  64. 64. Backgroundable lib/something.rb include  TorqueBox::Messaging   class  Something    include  Backgroundable    always_background  :foo    def  foo;;  end    def  bar;;  end end ... @something.foo @something.background.bar 64
  65. 65. Backgroundable lib/something.rb include  TorqueBox::Messaging   class  Something    include  Backgroundable    always_background  :foo    def  foo;;  end    def  bar;;  end end ... @something.foo @something.background.bar 65
  66. 66. Backgroundable lib/something.rb include  TorqueBox::Messaging   class  Something    include  Backgroundable    always_background  :foo    def  foo;;  end    def  bar;;  end end ... @something.foo @something.background.bar 66
  67. 67. Backgroundable lib/something.rb include  TorqueBox::Messaging   class  Something    include  Backgroundable    always_background  :foo    def  foo;;  end    def  bar;;  end end ... @something.foo @something.background.bar 67
  68. 68. Backgroundable app/models/slow_poke.rb class  SlowPoke  <  ActiveRecord::Base    def  takes_forever;;  end    def  might_take_awhile;;  end end SlowPoke.always_background  :takes_forever @slowpoke.takes_forever @slowpoke.background.might_take_awhile 68
  69. 69. Queues Tasks  are  built  on  top  of   Queues.    Of  course,  you  may   build  your  own  “MOM”  apps   by  defining  your  own  Queues,   Topics,  and  their  message   Processors  yourself. 69
  70. 70. Queues config/queues.yml /queues/questions: /queues/answers:    durable:  false 70
  71. 71. Processors You  can  create  a  processor   class  to  receive  messages   from  a  Topic  or  Queue 71
  72. 72. Processors config/messaging.yml /topics/print: PrintHandler /queues/popular: - PopularHandler - AdultObserver: filter: "age >= 18" concurrency: 5 /queues/students: PrintHandler: config: color: true 72
  73. 73. Processors config/messaging.yml /topics/print: PrintHandler /queues/popular: - PopularHandler - AdultObserver: filter: "age >= 18" concurrency: 5 /queues/students: PrintHandler: config: color: true 73
  74. 74. Processors config/messaging.yml /topics/print: PrintHandler /queues/popular: - PopularHandler - AdultObserver: filter: "age >= 18" concurrency: 5 /queues/students: PrintHandler: config: color: true 74
  75. 75. Processors config/messaging.yml /topics/print: PrintHandler /queues/popular: - PopularHandler - AdultObserver: filter: "age >= 18" concurrency: 5 /queues/students: PrintHandler: config: color: true 75
  76. 76. Processors app/models/print_handler.rb include  TorqueBox::Messaging class  PrintHandler  <  MessageProcessor    def  on_message(body)        puts  "Processing  #{body}  of  #{message}"    end    def  configure(opts)        @color  =  opts['color']    end end 76
  77. 77. Queues  (again) But  how  do  you  send  a   message? 77
  78. 78. Queues example include  TorqueBox req  =  Messaging::Queue.new  '/queues/questions' res  =  Messaging::Queue.new  '/queues/answers'   Thread.new  do    req.publish  "What  time  is  it?"    puts  res.receive(  :timeout  =>  1000  ) end   puts  req.receive res.publish  Time.now 78
  79. 79. Queues example include  TorqueBox req  =  Messaging::Queue.new  '/queues/questions' res  =  Messaging::Queue.new  '/queues/answers'   Thread.new  do    req.publish  "What  time  is  it?"    puts  res.receive(  :timeout  =>  1000  ) end   puts  req.receive res.publish  Time.now 79
  80. 80. Queues example include  TorqueBox req  =  Messaging::Queue.new  '/queues/questions' res  =  Messaging::Queue.new  '/queues/answers'   Thread.new  do    req.publish  "What  time  is  it?"    puts  res.receive(  :timeout  =>  1000  ) end   puts  req.receive res.publish  Time.now 80
  81. 81. Queues example include  TorqueBox req  =  Messaging::Queue.new  '/queues/questions' res  =  Messaging::Queue.new  '/queues/answers'   Thread.new  do    req.publish  "What  time  is  it?"    puts  res.receive(  :timeout  =>  1000  ) end   puts  req.receive res.publish  Time.now 81
  82. 82. Queues “on  the  fly” include  TorqueBox queue  =  Messaging::Queue.new  '/queues/foo' queue.create    ...   queue.destroy 82
  83. 83. Topics • behavior  is  different,  but  interface  is   the  same. • all  subscribers  of  a  topic  see  each   message,  but  only  one  subscriber   will  see  any  message  from  a  queue   • use  topics.yml  to  define  topics • use  TorqueBox::Messaging::Topic 83
  84. 84. Scheduling get regular later 84
  85. 85. Jobs app/jobs/newsletter_sender.rb class  NewsletterSender      def  run()        subscriptions  =  Subscription.find(:all)        subscriptions.each  do  |e|            send_newsletter(  e  )        end    end   end 85
  86. 86. Jobs config/jobs.yml monthly_newsletter:    description:  first  of  month    job:  NewsletterSender    cron:  ‘0  0  0  1  *  ?’ sandbox:    job:  Sandbox    cron:  ‘*/5  *  *  *  *  ?’ 86
  87. 87. Jobs “Fire  every  half  hour  from  10am  until  1pm   on  the  third  Friday  of  each  month” 0 */30 10-13 ? * FRI#3 Seconds Minutes Hours DOM Month DOW Year 1-7 1-12 1970- 1-31 SUN- 0-59 0-59 0-23 JAN- 2099 ?LW SAT DEC empty ?L# 87
  88. 88. Jobs • More  portable.  What  is  the  first  day   of  the  week  on  BSD  again?    What’s   cron  on  Windows? • Self  contained  within  the  app.    No   external  systems  to  manage  and   keep  in  sync. • Full  rails  environment  loaded  and   available. 88
  89. 89. Services run along, lil’ daemon 89
  90. 90. Services Long-­running,  non-­web   “daemons”  that  share  the   runtime  environment  and   deployment  lifecycle  of   your  app. 90
  91. 91. Services • Represented  as  a  class  with   optional  initialize(Hash),   start()  and  stop()  methods,   which  should  each  return  quickly. • Typically  will  start  a  long-­running   loop  in  a  thread  and  respond  to   external  events. • Configured  via  services.yml 91
  92. 92. Services config/services.yml IrcBot:    server:  freenode.net    channel:  #torquebox    publish:  /topics/irc MyMudServer: SomeOtherService: 92
  93. 93. Services app/{models,etc}/my_service.rb class  MyService    def  initialize  opts={}        name  =  opts[:publish]        @queue  =  Messaging::Queue.new(name)    end    def  start          Thread.new  {  run  }      end    def  stop          @done  =  true    end end 93
  94. 94. Services app/{models,etc}/my_service.rb class  MyService    def  initialize  opts={}        name  =  opts[:publish]        @queue  =  Messaging::Queue.new(name)    end    def  start          Thread.new  {  run  }      end    def  stop          @done  =  true    end end 94
  95. 95. Services app/{models,etc}/my_service.rb class  MyService    def  initialize  opts={}        name  =  opts[:publish]        @queue  =  Messaging::Queue.new(name)    end    def  start          Thread.new  {  run  }      end    def  stop          @done  =  true    end end 95
  96. 96. Services app/{models,etc}/my_service.rb class  MyService    def  initialize  opts={}        name  =  opts[:publish]        @queue  =  Messaging::Queue.new(name)    end    def  start          Thread.new  {  run  }      end    def  stop          @done  =  true    end end 96
  97. 97. Services app/{models,etc}/my_service.rb class  MyService    def  run        until  @done            @queue.publish(Time.now)            sleep(1)          end    end end 97
  98. 98. Services app/{models,etc}/my_service.rb class  MyService    def  run        until  @done            @queue.publish(Time.now)            sleep(1)          end    end end 98
  99. 99. Services app/services/evented_service.rb class  EventedService    def  initialize  opts={}        @opts  =  opts    end    def  start          Thread.new  {  EventMachine.run  {...}  }    end    def  stop          EventMachine.stop    end end 99
  100. 100. Clustering less failure faster 100
  101. 101. out-­of-­the-­box • JBoss  provides • session  replication • load-­balanced  messaging • mod_cluster  provides • session  affinity • intelligent  load-­balanced  web • failover 101
  102. 102. JBOSS_CONF TorqueBox  ships  with  two   JBoss  server  configurations:   default  (not  clustered)  and  all   (clustered).  To  enable   clustering... $  export  JBOSS_CONF=all 102
  103. 103. deploy  and  run $  export  JBOSS_CONF=all $  jruby  -­S  rake  torquebox:deploy $  jruby  -­S  rake  torquebox:run 103
  104. 104. mod_cluster A  reverse  proxy  implemented   as  an  Apache  module  with   JBoss  awareness.  Constantly   gathers  load  statistics  and   deployment  availability  for   intelligent  request  distribution. 104
  105. 105. mod_cluster 105
  106. 106. mod_cluster • Dynamic  configuration • Server-­side  load  factor  calculation • Fine-­grained  web  app  lifecycle • AJP  (Apache  JServ  Protocol)  is   optional.  HTTP[S]  is  also  supported. 106
  107. 107. Future coming soon 107
  108. 108. Future • Performance  benchmarking  and   optimization • Infinispan  for  ActiveSupport::Cache   and  NoSQL  persistence • JBoss  SSO,  HASingleton,  logging • CDI  injection  of  Java  components  into   Ruby • More  JavaEE  bridged  to  Ruby  where   it  makes  sense,  e.g.  BPM,  Drools,   Transactions,  etc. 108
  109. 109. Resources • http://torquebox.org • #torquebox  on  freenode • https://github.com/torquebox • http://twitter.com/torquebox • http://projectodd.org 109
  110. 110. Thanks! questions? 110

Editor's Notes

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  • easy JEE integration\nreplacement for JSF\n
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  • Can also apply ruby tools, e.g. Cucumber and RSpec, to java.\n
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  • Hot deployment, clustering, caching, messaging, scheduling, transactions, lifecycle management, etc.\n
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  • Ensure you have Java 6 installed\n
  • Ensure you have Java 6 installed\n
  • Ensure you have Java 6 installed\n
  • Ensure you have Java 6 installed\n
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  • Not imposing JEE arbitrary packaging conventions on ruby just to enjoy the JEE services.\n
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  • Or integrate with a legacy Java app through its queues.\n
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  • destinations on the left, processors on the right!\n
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  • Ruby messages being Base64-encoded over JMS String-type messages\n
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  • Should reside beneath app/jobs\nOnly a run() method is required\n
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  • The last day of the month\nThe last weekday of the month\nThe weekday closest to the 15th\n
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  • Recent articles posted on torquebox.org detailing clustering config\n
  • reverse proxy / load balancer\n
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  • As server nodes join and leave the cluster, the balancer (mod_cluster) is aware of these changes.\n
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  • *.bat equivalents\nwindows service config\n
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