The document discusses Inversion of Control (IoC), an abstract principle in software architecture that reverses the flow of control, contrasting it with procedural programming. It covers various aspects of IoC, including dependency injection techniques and provides examples using the Spring Framework. Additional references for further reading on IoC and related concepts are also included.

1. Spring:
usarlo conviene, ma usalo bene
Lucio Benfante
lucio@benfante.com
verona.javaday.it www.jugpadova.it

2. Inversion Of Control (IoC)
Inversion of control, or IoC, is an abstract
principle describing an aspect of some
software architecture designs in which the
flow of control of a system is inverted in
comparison to procedural programming.
from wikipedia

3. Dependencies are BAD
List drugs = new ArrayList();

4. IoC and Dependency Injection (DI)
Inversion of Control
Dependency Lookup Dependency Injection
Setter injection Constructor Injection

5. Spring framework?
IoC container

6. Inject your objects
<beans>
<bean id=”person1” class=”com.myapp.Person”>
<property name=”firstName” value=”Lucio”/>
<property name=”lastName” value=”Benfante”/>
<property name=”bornIn” ref=”venice”/>
</bean>
<bean id=”venice” class=”com.myapp.City”>
<constructor-arg value=”Venezia”/>
</bean>
</beans>

7. XML is boring

8. Spring in Parancoe demonstration
(www.parancoe.org)

9. References
● http://www.objectmentor.com/resources/articles/dip.pdf
● http://martinfowler.com/articles/injection.html
● http://martinfowler.com/bliki/InversionOfControl.html
● www.springframework.org
● www.parancoe.org
●