Presentation given at DevNexus 2012, Atlanta Abstract: Is it the modular design and infinitely extensible architecture? Is it the elegant administration? Perhaps it’s compliance with the universal language of standards? Maybe the ease of testing your applications? We’ll search the answer together in a journey that will take you from testing the water to the deep dive, and in which you’ll learn the secrets behind the unparalleled speed, incredibly small foot print, and exciting usability features of the next generation application server from JBoss.

1. What Makes JBoss AS7 Tick?
Marius Bogoevici
Senior Software Engineer,
JBoss by Red Hat
What makes JBoss tick?
Marius Bogoevici
@mariusbogoevici
Friday, 23 March, 12

2. About me
• Senior Software Engineer, JBoss by Red Hat
• Snowdrop Lead (Spring extensions for JBoss AS)
• Contributor to Weld, JSR-299 RI
• Contributor to JBoss AS6, JBoss AS7
• Interest in enterprise integration
• committer Spring Integration
• author “Spring Integration in Action” (Manning,
2012)
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3. Friday, 23 March, 12

4. Timeline
Spring July August September February March
2010 2011 2011 2011 2012 2012
7.0 7.0.1 7.0.2 7.1 7.1.1
Java EE 6 Fixes and Java EE 6
Web profile enhancements Full profile
certified certified
http://www.jboss.org/jbossas/
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5. What makes JBoss AS7
tick?
or:
Understanding JBoss AS7’s
features through its
architecture
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6. Fast
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11. It’s the law!
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12. Moore’s Law
The number of transistors
which can be inexpensively
placed on a chip doubles
every two years.
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13. 1960-2000s: Faster
Since mid-2000s: more cores,
energy efficiency,
not faster
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14. Amdahl’s Law
The speedup of a
program using
multiple processors Oh, ok.
in parallel
computing is limited
by the time needed
for the sequential
fraction of the
program.
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15. first-class components
improved architecture
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16. Modular
architecture
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17. Mi
cr
oc
Microcontainer on
Microkernel JB
JB os ta
os s in
JBoss AS 3 s AS er
Microkernel
JBoss AS 4 AS 5
6
New architecture
Requirements:
Highly concurrent
Low Memory consumption
Avoid reflection
On demand
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18. JBoss AS architecture
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19. Subsystems are extensions
<server xmlns="urn:jboss:domain:1.2"> pluggable
<extensions> extension
<extension module="org.jboss.as.web"/>
</extensions>
set of subsystems
<profile>
<subsystem xmlns="urn:jboss:domain:web:1.1"
default-virtual-server="default-host" native="false">
<connector name="http" protocol="HTTP/1.1" scheme="http"
socket-
binding="http"/>
<virtual-server name="default-host" enable-welcome-root="true">
<alias name="localhost"/>
<alias name="example.com"/>
</virtual-server> materialized
</subsystem> extension
</profile>
</server>
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20. Modular service container
Every deployable entity is a service
Deployment coordinated by subsystems
Concurrent service startup
Parallel dependency resolution
Lazy loading of expensive services
STAX parser
Annotation & reflection indexing
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21. Hierarchical classloading
System CL
Server CL Hibernate 4
Deployment CL Deployment CL
Hibernate 3.6.x
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24. Modular classloading
101
Module A Module B
Module C v1 Module C v2
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25. JBoss Modules
Modular classloader system
Concurrent classloading
Pure modularity (deps added on request)
Simple dependency rules
Extremely fast dependency resolution
Deployments are modules themselves
Own exclusions/inclusions
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26. And OSGi ?
JBoss OSGi
JBoss Modules Modular Service Container
Yes. JBoss AS7 is an OSGi runtime
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27. Exceptionally
lightweight
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28. GuruPlug
512M RAM
1.2 GHz
512M NAND Flash
More at: http://www.jboss.org/jbw2011keynote
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29. Better control
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30. Wide management options
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31. Standalone mode
• Single server instance
• ‘Classic’ approach
• Managed individually
• configuration file
• web interface
• Best for development
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32. Domain mode
• Centralized management
• Centralized deployment
• Group configuration
policy
• Suitable for production,
large number of servers
• Easy vertical scaling
• Easy vertical/horizontal
clustering
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33. Secure by default
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34. Cloud-ready
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35. https://openshift.redhat.com/
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36. A versatile server
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37. ...and a platform
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38. http://jboss.org/switchyard
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39. http://jboss.org/snowdrop
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40. http://torquebox.org
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41. http://jboss.org/immutant
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42. http://jboss.org/capedwarf
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43. Tools
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44. Be a craftsman.
http://www.jboss.org/tools
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45. Be a craftsman. Faster.
http://jboss.org/forge
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46. Learn to trust your code.
http://jboss.org/arquillian
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47. A community effort ...
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49. ... with enterprise support
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51. Questions?
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52. http://jboss.org/jbossas #jbossas7
THANKS!
@mariusbogoevici mariusb@redhat.com
Friday, 23 March, 12