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2011-11-01 | 10:40 AM - 11:40 AMAlthough you can build Java EE 6 applications with only a fraction of the code that’s necessary with J2EE, many projects are still based on the bloated and exaggerated J2EE patterns and best practices. This session discusses how to build lean applications in a productive and maintainable way. The following pragmatic tools, patterns, and best practices will be covered with working source code, which are especially interesting to Java EE developers and architects: - Mixing CDI, JPA, EJB, JSF, and JAX-RS to save code - Mocking, unit testing, stress testing, and integration testing - Continuous integration and build (Maven 3, Git) - Efficient data access without DAOs - CAP and BASE - Asynchronous CDI events for decoupling and pub/sub - Pro-active JMX monitoring instead of logging
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blog.adam-bien.com / twitter:@AdamBien
Java EE Clean Code[kill the bloat]
blog.adam-bien.com / twitter:@AdamBien
• Expert Group Member (jcp.org) of Java EE 6, Java EE 7, JPA 2.1, EJB 3.2, CDI 1.1, JMS 2.0 (...)
• Java Champion, (JavaONE) speaker + rockstar, freelancer, consultant and author: >100 articles, 7 German books,
• Author: “Real World Java EE Patterns– Rethinking Best Practices” and “Real World Java EE Night Hacks” http://press.adam-bien.com
• NEW: workshops.adam-bien.com
• http://kenai.com/projects/javaee-patterns/
http://java.net/projects/x-ray
blog.adam-bien.com / twitter:@AdamBien
Adam Bien, press.adam-bien.com
blog.adam-bien.com / twitter:@AdamBien
Adam Bien, press.adam-bien.com
blog.adam-bien.com / twitter:@AdamBien
“Perfection (in enterprise development) is achieved not when there is nothing more to add, but rather when there is nothing more to take away.”
--Antoine de Saint-Exupéry
General Advice: Don't Distribute (CAP)
adam-bien.com
J2EE Patterns in Java EE
adam-bien.com
It’s Not Overengineering...
adam-bien.com
...It’s Cargo Cult Programming:
[http://en.wikipedia.org/wiki/Cargo_cult_programming]
blog.adam-bien.com / twitter:@AdamBien
“...Cargo cult programming is a style of computer programming that is characterized by the ritual inclusion of code or program structures that serve no real purpose...”
blog.adam-bien.com / twitter:@AdamBien
“...Cargo cult programming can also refer to the results of (over-)applying a design pattern or coding style blindly without understanding the reasons behind that design principle in the first place. Examples are adding unnecessary comments to self-explanatory code, adding deletion code for objects that garbage collection would have collected automatically with no problem, creating factory objects to build simple objects, etc. It often happens when programmers are inexperienced with the programming language, or simply overzealous...”
Verify Your Design With …Aliens
adam-bien.com
...or ask a Ruby / Python developer...
Continuous Everything (Integration,
Deployment, QA)
Mocks, Unit-, Integration- and Stress Testing
Strict Separation Between Unit-, Integration-, and
System Tests
Java EE 6, Maven 3, Continuous Integration
And Git
Convention Over Configuration with DI
No, I don't want your XML!
Homegrown Frameworks?
JavaDoc Is Suspicious
DRY And DIE
package private fields or public setters?
Back To Java SE Thinking
Rich Domain Objects
No Interfaces
No Extensive Layering
Rethink J2EE Patterns
Rethink GoF Patterns
Factory
Observer
Builder
Facade
Bridge
Strategy
Decorator
Entity Control Boundary
adam-bien.com
Thank You!blog.adam-bien.com
twitter.com/AdamBien