dynamic languages web frameworks indicthreads 2009

1. Dynamic Languages & Web Frameworks in GlassFish v3 Arun Gupta (blogs.sun.com/arungupta, @arungupta) Sun Microsystems, Inc.

2. What is a Dynamic Language ?

Broadly a language that allows a program to change its own code at runtime

Evaluate data as code ("The name is: #{@name}" )

3. Manipulate code as data ({"name"=>"Duke"}.each {|data| puts data})

4. High order functions

5. Dynamic Typing

6. Closures, Continuations, Macros, ...

Simple, human-readable syntax

7. List, Ruby, Python, Groovy, ...

8. Web Frameworks

Full-stack

Object relational mapping

9. MVC-pattern

10. Templating

11. JavaScript library

12. Extension points

Agile Development

No compile, redeploy, restart cycles

13. Testing built into the framework

14. Design Principles

Convention over Configuration (CoC)

Common cases easily served

15. Encourages standard practices

16. Everything simpler and smaller

Don't Repeat Yourself (DRY)

Framework written around minimizing repetition

17. What is GlassFish ?

A community

Users, Partners, Testers, Developers, ...

18. Started in 2005 on java.net

Application Server

Enterprise Quality and Open Source

19. Java EE Reference Implementation

20. Full Commercial Support from Sun

21. Sun GlassFish Enterprise Server GlassFish Open Source Application Server Customer Focused Support Team Patches & Upgrades 24x7 Support Customer Advocate Sun VIP Interoperability Support Enterprise Manager eLearning Credit

22. GlassFish v3

Modular:

Maven 2 Build & Module description

23. Felix OSGi runtime (216 bundles)

24. Allow any type of Container to be plugged

Start Container and Services on demand

Embeddable: runs in-VM

25. Extensible

Rails, Grails, Django, ...

26. GlassFish v3 Architecture GlassFish Kernel Security Rails Grails Web Config Injection Naming Grizzly Bundles Repositories HK2 Services OSGi Runtime

27. Dynamic Languages & Frameworks http://glassfish-scripting.dev.java.net

28.

Ruby interpreter written in Java

29. Current Version: 1.4.0

30. Ruby 1.8.6 compatible

31. Some Ruby 1.9 support

--1.9 flag

32. 80% of 1.9.1

9 Active committers

What is? http://jruby.kenai.com/presentations/JRubyConf%2009%20Keynote.pdf

33. Compatibility

~37,000 passing rubyspecs

34. ~22,000 passing assertions

35. Continuous Integration

On commit ~3 Java versions * 4 vendors

36. Nightly: 30 minute full run

37.

Solid performance ( Ruby 1.9)

Startup is poor, execution usually better than 1.9

Runs native threads

38. Foreign Function Interface (FFI) for C libraries

39. Runs Rails great!

40.

Full-stack Web development MVC framework in Ruby

41. Current Version: Rails 2.3.4

42. Getting Started

Install Rails: jruby -S gem install rails

43. Generate Rails app: jruby -S rails helloworld

What is?

44. Rails Deployment Choices Credits: http://birdwatchersdigest.com

45. Directory-based Deployment: How ? jruby -S rails helloworld asadmin start-domain asadmin create-jvm-options -DJRUBY_HOME=... asadmin deploy railsconf

46. Directory-based: Capistrano Recipes http://wiki.glassfish.java.net/Wiki.jsp?page=DeployUsingCapsitrano

47. Rails Development using NetBeans 6.8 http://blogs.sun.com/arungupta/entry/screencast_26_develop_run_debug

48. Rails Deployment: GlassFish Gem

49. GlassFish Gem: How ? jruby -S rails helloworld jruby -S gem install glassfish cd helloworld jruby -S glassfish

50. Single Threaded Rails < v 2.2

51. Multi Threaded Rails or Merb or ...

52. GlassFish Gem: Capistrano Recipes http://wiki.glassfish.java.net/Wiki.jsp?page=DeployUsingCapsitrano

53. GlassFish Gem Options jruby -S glassfish -h -n:Number of JRuby runtimes to create initially --runtimes-min:Minimum runtimes --runtimes-max:Maximum runtimes -c : change the context root -e : environment -d : Runs as daemon -P : location of PID file -l : log file location -log-level : Logging level (0-7)

54. Demo GlassFish Gem http://blogs.sun.com/arungupta/entry/totd_76_jruby_1_2

55. GlassFish Gem in Production

Easy,greendeployment

Reverse proxy not required

56. JRuby runtime pool provides required scaling

Rails is single threaded by default

MT frameworks scales automatically

JRuby and JVM support native threads

Configuration using glassfish.yml

57. Optional front-ending http://blogs.sun.com/arungupta/entry/totd_81_how_to_use http://blogs.sun.com/arungupta/entry/totd_84_using_apache_mod

58. Rails Deployment: WAR-based

59. WAR-based: How ? jruby -S gem install warbler cd helloworld jruby warble config Edit config/warble.rb Include gems, Change RAILS_ENV jruby warble asadmin deploy helloworld.war jruby -S rails helloworld

60. WAR Deployment: Packaging

61. Demo WAR-based Deployment http://blogs.sun.com/arungupta/entry/totd_73_jruby_and_glassfish

62. JRuby Module onGlassFish Update Center

63. Ruby Rack Support

Rack - A Web server interface

64. Plugin any Rack compliant framework

Rails, Merb, Sinatra, Ramaze, Campsite, ...

Rack support in GlassFish

GlassFish Gem

Plugin any Rack metal (such as RackCache)

GlassFish v2 & v3 through Warbler

Use your own framework

Rackup script

65. jruby.applicationType property

66. Ruby Application Auto-detection

67. Performance

Need JVM tuning for production

Use Server profile where possible (- server )

GC settings

-XX:+DisableExplicitGC,-XX:NewRatio=2

Memory settings

Use large settings for -Xmx -Xms and -XX:MaxPermSize

68. Use at least 20 MB perm gen space for each JRuby runtime

69. Scaling

Rails is single-threaded by default

70. Setup JRuby runtime pool

With gem

glassfish -n 3 runtime-min 2 runtime-max 4

2 HTTP Worker Threads per runtime

71. Turn on file caching

network-config>protocols>protocol>http>file-cache#enabled

MT frameworks (Rails > 2.2, Merb)

No configuration needed

72. Rails Monitoring

Basic Monitoring

jinfo : System properties and VM CLI flags

73. jmap : Shared object memory map

74. jstack : Stack traces of Java threads

75. jstat : Performance stats on class, JIT compiler, GC

Advanced

jconsole / Visual VM

76. NewRelic, FiveRuns, ...

77. Rails Monitoring in GlassFish v3

asadmin enable-monitoring level jruby-container=HIGH

78. asadmin list monitor=true *

79. asadmin list monitor=true *jruby*

80. asadmin list-probes | grep jruby

81. dtrace or JavScript-based monitoring

http://blogs.sun.com/arungupta/entry/totd_104_glassfish_v3_monitoring

82. Endorsements Look like thebest deploying optionI ever found for Rails, GREAT!theeasiest rails stack in the world, jruby 1.2rc, rails 2.3rc, glassfish v3 ... too easyto run jruby/rack/ glassfish behind nginx leading the way to simple,scalable, no-hassle hostingforRuby web applications. ... it's true one-step deployment . hadno reliability and performance issueswith Glassfish money is onJRuby (and Glassfish) for the long haul ; if you haven't checked out Glassfish yet, you're doing yourself a disservice! nice way to deploy andmanage my app whileleaving things open for scaling

83. Who loves Rails on GlassFish ?

85. What is?

Agile dynamic language for the JVM

86. Seamlessly integrates with all existing Java objects & libraries

Compiles straight to bytecode

Current version: 1.6.7

87. groovy -e "println 'Hello ' + args[0]" World

88. What is?

MVC Web framework for the Java platform

Persistence framework (Hibernate)

89. Templating using GSP (Groovy Server Pages)

90. Tag libraries to create web page components

91. Good Ajax support

92. Web server & automatic resources reload

Current Version: 1.1.2, 1.2 RC1 released 12/5

93. Grails Hello World

Create app: grails create-app bookstore

Create domain class: grails create-domain-class book

94. Edit grails-app/domain/Book.groovy and add attributes

95. Create controller: grails create-controller Book

96. Edit grails-app/controllers/BookController.groovy

97. Add scaffold: def scaffold = Book

Run app: grails run-app

98. Grails on GlassFish App Server

Create WAR: grails war

99. Deploy: asadmin deploy helloworld-0.1.war

100. Demo Grails & GlassFish http://blogs.sun.com/arungupta/entry/getting_started_with_grails_on http://blogs.sun.com/arungupta/entry/totd_75_getting_started_with http://blogs.sun.com/arungupta/entry/grails_on_glassfish_v3_embedded http://blogs.sun.com/arungupta/entry/tic_tac_toe_using_rails

101. Grails Module on GlassFish Update Center

102. Efficient Deployment

Grails Application WAR

Large

Over 48 Grails dependent JARs

103. ~20MB for a simple app

Expensive to bundle in single WAR

104. Issues when hot deployment is required

105. GlassFish proposes light-weight WAR

Don't package dependencies!

106. Smaller WAR file: ~200KB vs ~20MB

107. GlassFish knows how to find dependencies

108. Only one copy of dependencies in GlassFish

Less memory consumption and deployment speed-up

$ grails shared-war

109. With Grails 1.1 usenojars option

110. $ asadmin deploy helloworld-0.1.war

111. GlassFish/Grails: Coming up ...

Use grails nojars

JIRA-5174, JIRA-5175

grails install-plugin glassfish global

grails run-app

asadmin deploy grailsApp

113. What is?

Implementation of Python in Java

Seamless integration of Python and Java

114. Java Python

115. Just Python

116. Dynamic compilation to Java bytecodes

Jython 2.5.1 released (Sep 2009)

117. Works with Django 1.0

118. What is?

MVC-based framework written in Python

Object-relational mapper

119. A lightweight, standalone Web server

120. A regular expression based URL dispatcher

121. A templating system

122. A caching framework

123. An internationalization system

124. . . .

125. GlassFish Deployment

Deploy as WAR

Modjy

Servlet, ServletContextListener + WSGI Implementation

126. Integrated with Jython 2.5

Pure Django Deployment

Grizzly + WSGI => Django

127. No WAR, no packaging

128. asadmin deploy myDjangoApp

129. How does it work ?

Download Jython

130. Install Django (jython25 setup.py install)

131. GlassFish v3 Jython OSGi module from UC

132. asadmin create-jvm-options -Djython.home=...

133. cd DjangoApp

134. asadmin deploy .

135. Jython Module on GlassFish Update Center

136. Demo Django & GlassFish http://blogs.sun.com/arungupta/entry/totd_85_getting_started_with

137. http://blogs.sun.com/arungupta/entry/tic_tac_toe_using_rails

138. Java EE & Dynamic Languages

JavaEE is a mature and robust platform

Servlet, EJB, JMS, JAX-RS, JAX-WS...

Hybrid Rails and Servlet/JSP application

Forward to and from Rails to Servlet/JSP

139. HTTPSession as Rails session

140. ServletRequest/Response API available to Rails

JDBC connection pool

141. JMS: Async messaging in Rails

142. Servlet 3.0 Pluggability

JavaEE 6 and Dynamic Languages

No boilerplate web.xml

143. Dynamically add ServletFilter and ServletContextListener

Simple packaging

No need to package as WAR, No Warbler

144. Place application inside WEB-INF directory

145. References

glassfish.org

146. glassfish-scripting.dev.java.net

147. sun.com/glassfish

148. blogs.sun.com/theaquarium

149. twitter.com/glassfish

150. [email_address]

151. Dynamic Languages & Web Frameworks in GlassFish v3 Arun Gupta (blogs.sun.com/arungupta, @arungupta) Sun Microsystems, Inc.

dynamic languages web frameworks indicthreads 2009

Technology