Java EE and Spring Framework Shootout - Reza Rahman

Java EE and Spring Framework Shootout
Rohit Kelapure IBM Advisory Software Engineer, http://wasdynacache.blogspot.com/
Reza Rahman Independent Consultant, Author, Java EE Expert http://www.rahmannet.net/
Presentation can be downloaded from http://db.tt/1q9us2JH

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Copyright and Trademarks


© IBM Corporation 2011. All Rights Reserved.


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Outline


Evolution of Java EE and Spring
Java EE 6 & Spring 3.0, 3.1 highlights
Spring 3.1 feature comparison with Java EE 6
CDI and Spring ecosystem
Spring and Java EE coexistence
Conclusion

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J2EE Java EE Specifications

* Introduced in spec. © 2011 IBM Corporation

Evolution of J2EE Java EE6 (Dec 09)

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JSR 299 Contexts and Dependency Injection (CDI)
Adds dependency injection to JEE and makes it type-safe.
Hollywood principle - Don’t call us, we will call you
No hard coded dependencies on other specifications
Assists in unifying the Bean model
Well defined contexts, the ability to bind beans statefully to them & manage their lifecycle.
Introduces an event notification system to decouple producers & consumers
Uses interceptors to foster loose coupling – Extend behavior with type safe interceptor bindings – Refines interceptors into decorators for finer grained control
Integrates with the Unified EL to bridge JSF – Enables use of EJB 3.0 components as JSF managed beans
Introduces an SPI to extend JEE – Roll your own JEE7! – Not only an API but also a SPI – Rich ecosystem of CDI extensions
Adds the Web conversation context
Spring does NOT provide support for CDI

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Evolution of Spring [ 1.0, 2.0, 2.5, 3.0, 3.1]

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Spring Framework


Lightweight dependency injection
Aspect oriented
Layered application & container framework
Well defined modules on top of the core container
NOT an all-or-nothing solution 9

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Birds Eye View

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Java EE vs. Spring Framework Features/APIs Overview

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Java EE vs. Spring Business Component

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Spring XML for Business Component Injection

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Spring XML for Business Component Injection

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Spring Java Based Configuration

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Spring Java Based Configuration

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Java EE Interceptor vs. Spring Aspects

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Java EE vs. Spring Injection

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Java EE vs. Spring Injection – Spring configuration

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JSF 2 vs. Spring MVC Front Controller Facelet Component

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JSF 2 vs. Spring MVC Front Controller Facelet

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JSF 2 vs. Spring MVC Front Controller JSF Event Handler

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Entity

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JSF 2 vs. Spring MVC Spring MVC JSP

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Spring MVC Configuration

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Spring Controller

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Spring MVC web.xml configuration

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Java EE vs. Spring Scheduling

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Java EE vs. Spring Scheduling

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Java EE vs. Spring Messaging

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Spring JMS Configuration

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Spring Message Producer

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Java EE Message Producer & JMS Abstraction

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Java EE Message Producer & JMS Abstraction

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Hacking the Java EE Platform - CDI Extensions
Activated by dropping jars on the application classpath
Loaded by the java.util.ServiceLoader SPI
Integrate with container through container lifecycle events by –Register additional beans, interceptors and decorators –Injecting dependencies into its own objects –Introduce custom scope with backing context –Augment or override bean annotation-based metadata with other source
Tools/utilities, extending Java EE, integration with Java EE APIs, integrating with non-standard APIs, making Java EE features available in non-Java EE 34

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Spring Ecosystem

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CDI Landscape

Implementations

Weld

Portable Extensions

Runtimes

CanDI

Tools

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CDI Ecosystem

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Spring & Java EE Coexistence
Integration with Java EE APIs – Spring beans can be injected into JSF Managed Beans – Spring beans can be referenced in EL with no JSF Backing beans – Spring JmsTemplate can be used on top of raw JMS API for convenience – Spring Listeners similar to EJB MDBs especially JCA rather than JMS listeners – Hibernate validator standardized as Bean Validation (JSR 303) – Spring 3 supports excellent bi-directional integration with EJBs – CDI and Spring Integration through the Spring Bridge to CDI
Native support for Java EE – Java EE5 and Java EE6 annotations supported by Spring – Spring can use JPA / Hibernate natively
Application server integration – DataSources can use application server QoS like pooling, transactions, statement caching, debugging, monitoring and security

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Java EE coexistence with Spring

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Birds Eye View

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References


Evolution of Java EE http://en.wikipedia.org/wiki/Java_EE_version_history
Java EE 6 Tutorial http://download.oracle.com/javaee/6/tutorial/doc/
Spring Docs http://static.springsource.org/spring/docs/3.1.x/spring-framework-reference/
Spring Projects http://www.springsource.org/projects
Miscellaneous CDI Extensions https://github.com/softwaremill/softwaremill-common
Migrating Spring to Java EE – https://github.com/paulbakker/migrating-spring-to-javaee – http://ocpsoft.com/java/spring-to-java-ee-a-migration-guide-cdi-jsf-jpa-jta-ejb/
CDI- Spring Bridge – http://rick-hightower.blogspot.com/2011/04/cdi-and-spring-living-in-harmony.html – http://niklasschlimm.blogspot.com/2011/08/jsr-299-cdi-interceptors-for-spring.html – http://niklasschlimm.blogspot.com/2011/08/jsr-299-cdi-decorators-for-spring-beans.html
Best practices integrating Spring with WebSphere Application Server – http://www.ibm.com/developerworks/websphere/techjournal/0609_alcott/0609_alcott.htm
What’s new in Spring 3.1 http://static.springsource.org/spring/docs/3.1.x/spring-frameworkreference/htmlsingle/spring-framework-reference.html#new-in-3.1

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References continued


SEAM 3 http://seamframework.org/Seam3
CODI http://myfaces.apache.org/extensions/cdi/
Weld http://seamframework.org/Weld
CanDI http://www.caucho.com/resin/candi/
OpenWebBeans http://openwebbeans.apache.org/owb/index.html

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