Java & SOA Open Source

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Aluna

Israel’s leading Java/JavaEE and SOA consulting company

Customers:

Agenda

Java Open Source

SOA Open Source

How to chose an open source

Open source - tips

Java

So Many Sources

Apache

Eclipse

Java.net

Jboss

ObjectWeb

Sourceforge

The question is what to choose from, and not if the library exists

Java

The VM itself is being open sourced, including API implementation and more

Apache Commons

The Commons Proper is dedicated to one principal goal: creating and maintaining reusable Java components. The Commons Proper is a place for collaboration and sharing, where developers from throughout the Apache community can work together on projects to be shared by the Apache projects and Apache users.

Apache Commons

Some common libraries:◦ Configuration

◦ Bean Util

◦ Logging

◦ Pool

◦ Validator

◦ Many more

Web Services

Apache AXIS, AXIS2

Apache CXF

Java.net Metro

All work well, support the most up-to-date WS-* specs

So why so many?◦ Why not? The freedom of choice

XML

JAXB

XMLBeans

Stax

Castor

Digester

Build Tools

ANT

Maven – Also know to download the source for you

J2EE - Tomcat

Probably the most popular web container out there.

The servlet/jsp spec implementation

Fast, easy to manage

Handled by the Apache group

J2EE - JBoss

Probably the most popular J2EE server out there.

Full J2EE spec

Embedded Tomcat

Support through Redhat

Handled by jboss.org

J2EE - Geronimo

Who said there wasn’t politics in Open Source?

Full J2EE container

Offered by IBM as WebSphere CE (no relation to WebSphere Application Server)

Handled by Apache

J2EE - GlassFish

Open source J2EE server

The RI for J2EE

Handled by java.net

J2EE? - Spring

An open source framework that replaces J2EE, or at least abstracts it

Major innovation

Concepts such as IoC and AOP are embedded inside

Handled by www.springframework.org

ORM

Hibernate – will come in the next slide

Toplink

Open JPA

IBATIS

Database Access - Hibernate

Won over the Entity EJB spec – and created the new JPA spec

Easy to use ORM solution

Major performance benefits, shorten development time – used practically everywhere

Supported by RedHat

Handled by jboss.org

IDE - Eclipse

The #1 IDE in Java, by far

All major Java companies (except SUN) are part of the organizing committee of Eclipse

Versions to support:◦ J2EE

◦ PHP

◦ C++

◦ More

Innovation - AspectJ

Ability to use AOP inside Java

Highly popular

Handled by eclipse.org

Also we have:◦ Jboss – AOP

◦ Spring AOP

Quartz

Allows Job Execution in Java Some features:

◦ Support for persistent/non-persistent jobs.

◦ Simple and CRON based triggers.

◦ Support standalone and embedded operations.

◦ Can be operated in a remote manner.

◦ Support for Job and Trigger listeners.

◦ Can take part in JTA transactions.

◦ Clustering support.

◦ Can be used within J2EE applications.

Handled by OpenSymphony

UI - JSF

Tons of open source component libraries◦ RichFaces

◦ MyFaces

◦ Etc.

Even JSF RI implementation under the MyFaces project handled by Apache

Wow…

There are many frameworks and tools

Some were created by the vendors and donated to the community

It is a huge mistake not to look for open source infrastructure and develop it in house instead

Just make sure you use something that is supported and developed …

SOA

Open Source SOA

Not as common as Java Open Source

But tons of products, some of which should be used

ESB

OpenESB

Mule

ServiceMix◦ Easy to embed

◦ Easy to use

◦ First to support JBI spec – a new specification for ESB technology

ESB

BPM

Intalio

jBPM

Solutions for both embedded and standalone business process execution

Support the BPEL spec, development environments, etc.

How to chose open source

Check what is the stable release, and what is the latest build.

Go to the projects' bug/issue tracker and see what is resolved in the product, and which bugs are still outstanding. Get on the users' mailing list to learn a lot about the product.

Check the project road map. See what is coming - if anything.

How to chose open source - Cont

Google it

Ask in the community

Look on the code

Available support

Documentation /Amazon

Examples

Tips

Open sources are not always the right choice

Decoupling◦ Abstraction layer

◦ Interfaces

Look on the code

Dependencies

Don’t be adventure

Tips - Cont

Have an expert

Q & A