What makes JBoss AS7 tick?

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

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)


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/

What makes JBoss AS7
tick?

or:

Understanding JBoss AS7’s
features through its
architecture


It’s the law!

Moore’s Law

The number of transistors
which can be inexpensively
placed on a chip doubles
every two years.


1960-2000s: Faster

Since mid-2000s: more cores,
energy efﬁciency,
not faster


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.


first-class components

improved architecture


Modular
architecture

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

JBoss AS architecture


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>


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

Hierarchical classloading
System CL

Server CL Hibernate 4

Deployment CL Deployment CL

Hibernate 3.6.x


Modular classloading
101
Module A Module B

Module C v1 Module C v2


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


And OSGi ?

JBoss OSGi

JBoss Modules Modular Service Container

Yes. JBoss AS7 is an OSGi runtime


Exceptionally
lightweight

GuruPlug
512M RAM
1.2 GHz
512M NAND Flash

More at: http://www.jboss.org/jbw2011keynote

Better control


Wide management options

Standalone mode
• Single server instance

• ‘Classic’ approach

• Managed individually

• conﬁguration ﬁle

• web interface

• Best for development


Domain mode
• Centralized management

• Centralized deployment

• Group conﬁguration
policy

• Suitable for production,
large number of servers

• Easy vertical scaling

• Easy vertical/horizontal
clustering


Secure by default

Cloud-ready


https://openshift.redhat.com/

A versatile server


...and a platform


http://jboss.org/switchyard


http://jboss.org/snowdrop


http://torquebox.org


http://jboss.org/immutant


http://jboss.org/capedwarf


Be a craftsman.

http://www.jboss.org/tools

Be a craftsman. Faster.

http://jboss.org/forge


Learn to trust your code.

http://jboss.org/arquillian

A community effort ...


... with enterprise support

Questions?


http://jboss.org/jbossas #jbossas7

THANKS!

@mariusbogoevici mariusb@redhat.com

What makes JBoss AS7 tick?

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