What's new in Spring 4? Plus an introduction to Spring Data Modules

1. Spring Framework 4
and Spring Data
WHAT’S NEW

2. Agenda
Intro to Spring IoC
◦ Spring 3.x highlights
What’s new in Spring Core 4
◦ @Conditional
◦ Spring Boot
◦ Autowiring voor Generic types
Spring Data
◦ SQL and NoSQL
◦ Generic Query Framework

3. Intro to Spring Framework
Inversion of Control Pattern
◦ GoF °1995: Strategy Pattern
◦ Program using interfaces
◦ Clients are not tied to implementations
◦ Dependency Injection
◦ Central Application Context to wire implementations together
◦ Hollywood Principle: Don’t call us, we’ll call you
◦ Allows better testing
Spring Framework
◦ Rod Johnson book on J2EE: Spring 0.1 °2002
◦ Application context using XML descriptors
◦ ‘Faster, Beter, Lighter Java’: O’Reilly °2004
◦ Spring and Hibernate as alternative to J2EE/EJB 1/EJB 2

4. Spring Framework Modules
Spring includes various abstraction modules
◦ Database abstraction
◦ Exception Handling
◦ JDBC Abstraction
◦ Hibernate/JPA Session Management (deprecated)
◦ Remoting
◦ Data serialization abstraction
◦ Exception Handling
◦ Messaging
◦ JMS API Abstraction
◦ Data serialization abstraction
◦ Management
◦ JMX API Abstraction
Spring Framework also has Spring MVC and Spring WebFlow

5. Spring 3.x Highlights
Spring 2.5
◦ @Autowired and @Component classpath scanning
◦ Less XML
Spring 3.0
◦ JavaConfig iso XML Config files
◦ Even less XML
Spring 3.1
◦ Bean Profiles
◦ TestContext support
Spring 3.2
◦ Spring MVC improvements
◦ Spring MVC REST

6. Spring Framework 4
No big changes
◦ Mostly everything is backwards compatible
◦ Except @Autowired with Generics
◦ Some deprecated methods are finally removed
◦ E.g: ibatis ORM support
◦ Spring MVC base classes before annotation support
Some new features
◦ @Conditional
◦ Spring Boot
◦ Support for Groovy iso XML
Some modules major upgrade
◦ Spring MVC with WebSocket support

7. WebSockets in Spring 4
DEMO: https://github.com/rstoyanchev/spring-websocket-portfolio

8. Spring Data
Data Persistence abstraction
◦ Supports both SQL and NoSQL
◦ JPA/JDBC
◦ MongoDB/Hadoop
◦ Repository abstraction
◦ Save/load/delete
◦ Paging and sorting
◦ Entity annotations are stil
implementation specific
◦ Query Language abstraction
◦ QueryDSL

9. Spring Data Queries
Declare methods
in your repository interface
◦ findByXxxx
◦ Spring AOP will generate
Implementation
Or: use @Query annotation

10. Spring Data
DEMO

11. Questions