Java EE vs Spring Framework

© 2011 IBM Corporation© 2011 IBM Corporation

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

http://wasdynacache.blogspot.com/

http://wasdynacache.blogspot.com/

http://www.rahmannet.net/

http://www.rahmannet.net/

http://db.tt/1q9us2JH



© 2011 IBM Corporation

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© 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

Project JPE

EJB 1.0

Servlet 2.1

May 98

Enterprise Application

J2EE 1.2

EJB 1.1

Servlet 1.1

JSP 1.1

JMS 1.0.2

JDBC 2.0

JNDI 1.2

JAF 1.0

JTA 1.0

JTS 0.95

JavaMail 1.1

Dec 99

10 specs

Robust

Scalable

J2EE 1.3

EJB 2.0 (CMP,

MDB, local EJBs )

Servlet 2.3

(Events, Filters)

JSP 1.2

JDBC 2.1

JCA* 1.0

JAAS* 1.0

JAXP* 1.0

Sept 01

13 specs

Web Services

J2EE 1.4

EJB 2.1 (Timers

Pluggable JMS)

Servlet 2.4

JSP 2.0

Web Services*

JMX Mgmt.*

J2EE Deploy*

JACC*,

JAAS*

JAX-RPC*,

JAXR*

JSTL*

Nov03

20 specs

Ease of Development

JEE 5.0

EJB 3.0 (POJO components)

JPA 1.0* (POJO persistence)

JSF 1.2*

Servlet 2.5

JSP 2.1 (Common EL)

JAXB*, SAAJ*, StAX*, JAX-WS*

Web Services (POJO components, Protocol Independence)

Annotations (IoC), Injection

May06 24specs

* Introduced in spec.


Evolution of J2EEJava EE6 (Dec 09)

New specs (JAX-RS, CDI, Bean Validation)

Prune dead wood– EJB 2.x, JAX-RPC, JAXR, JEE App.

Deploy, JEE App mgmt.

Extensibility– Easy Framework Pluggability (web

fragments & CDI Extensions)

Enhanced ease of development– POJO annotation based Servlets, – Asynchronous processing (Servlet 3.0 &

EJB 3.1)– EJB 3.1

• EJB-in-WAR, No-interface view, Singleton, EJB-lite, Timers

– Contextual Dependency Injection (CDI)– RESTful services– Portable JNDI names

– JSF2.0• Facelets, built-in-AJAX, Skins, Annotations,

Resource handling• Simplified Navigation, Easier custom

components, View & Page scopes• Bookmarkable pages, Project Stage,

Expanded event model– JPA 2.0

• Mapping enhancements, JPAQL, Criteria Query API, Pessimistic locking

Profiles reduce platform size – Web Profile 12 specs

Vendor support– WebSphere AS 8– JBOSS AS 7– Oracle WebLogic 11g– Glassfish 3

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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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1.0

• Dependency injection

• POJO-oriented development

• Declarative AOP & transactions

• MVC framework

2.0

• Problem-specific XML

• Extensible configuration

• Bean scoping• Groovy,

JRuby, and BeanShell

• JSP tag library• Java 5

autoboxing and generics

2.5

• Annotation-driven wiring

• Automatic bean configuration

• New annotation-driven MVC framework

• JUnit 4-based integration testing

3.0• JSR-330 “at

inject”• New Spring

Expression Language

• First-class REST support

• Java-based configuration

• Several new Spring MVC features

• Support for JSR-303 declarative validation

• Annotation-based background and scheduled jobs

3.1• A new “c”

namespace• Configuration

profiles• Unified

property resolution

• Java configuration features

• Servlet 3.0 support

• Declarative caching

• Spring MVC enhancements


Spring Framework

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Lightweight dependency injection

Aspect oriented

Layered application & container framework

Well defined modules on top of the core container

NOT an all-or-nothing solution

© 2011 IBM Corporation10

Birds Eye View


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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Facelet Component

JSF 2 vs. Spring MVC Front Controller


Facelet



EntityJSF Event Handler



JSF 2 vs. Spring MVC

Spring MVC JSP


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


Spring Ecosystem

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CDI Ecosystem Snapshot

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Implementations

Weld CanDI

RuntimesPortable Extensions

Tools


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


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-framework-reference/htmlsingle/spring-framework-reference.html#new-in-3.1

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http://en.wikipedia.org/wiki/Java_EE_version_history

http://en.wikipedia.org/wiki/Java_EE_version_history

http://download.oracle.com/javaee/6/tutorial/doc/

http://download.oracle.com/javaee/6/tutorial/doc/

http://static.springsource.org/spring/docs/3.1.x/spring-framework-reference/

http://static.springsource.org/spring/docs/3.1.x/spring-framework-reference/

http://www.springsource.org/projects

http://www.springsource.org/projects

https://github.com/softwaremill/softwaremill-common

https://github.com/softwaremill/softwaremill-common

https://github.com/paulbakker/migrating-spring-to-javaee

https://github.com/paulbakker/migrating-spring-to-javaee

http://ocpsoft.com/java/spring-to-java-ee-a-migration-guide-cdi-jsf-jpa-jta-ejb/



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-interceptors-for-spring.html

http://niklasschlimm.blogspot.com/2011/08/jsr-299-cdi-decorators-for-spring-beans.html



http://www.ibm.com/developerworks/websphere/techjournal/0609_alcott/0609_alcott.htm

http://www.ibm.com/developerworks/websphere/techjournal/0609_alcott/0609_alcott.htm

http://static.springsource.org/spring/docs/3.1.x/spring-framework-reference/htmlsingle/spring-framework-reference.html#new-in-3.1





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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http://seamframework.org/Seam3

http://seamframework.org/Seam3

http://myfaces.apache.org/extensions/cdi/

http://myfaces.apache.org/extensions/cdi/

http://seamframework.org/Weld

http://seamframework.org/Weld

http://www.caucho.com/resin/candi/

http://www.caucho.com/resin/candi/

http://openwebbeans.apache.org/owb/index.html

http://openwebbeans.apache.org/owb/index.html

Technology

Java EE vs Spring Framework