Introduction to Spring [email_address]

What is Spring Java/JEE Application Framework Main target: JEE Web Applications Apache 2 License Hosted on SourceForge Business objects as POJO

Java/JEE Application Framework

Main target: JEE Web Applications

Apache 2 License

Hosted on SourceForge

Business objects as POJO

Integration O/R Mapping tools JDBC, Hibernate, JDO, iBatis, etc Web Frameworks Spring-WebMVC, Struts, Tapestry, etc Remoting Protocols RMI, JAX-RPC, HTTP, Hessian, Burlap,

O/R Mapping tools

JDBC, Hibernate, JDO, iBatis, etc

Web Frameworks

Spring-WebMVC, Struts, Tapestry, etc

Remoting Protocols

RMI, JAX-RPC, HTTP, Hessian, Burlap,

Hollywood Principle “ Don't call me, I'll call you” Inversion of Control spring-ioc as core module objects/components are configured from the outside Dependency Injection setter based (JavaBeans) constructor based service lookup (jndi, ...)

“ Don't call me, I'll call you”

Inversion of Control

spring-ioc as core module

objects/components are configured from the outside

Dependency Injection

setter based (JavaBeans)

constructor based

service lookup (jndi, ...)

core concepts Composition a pojo is flat by nature Lifecycle management BeanFactory Binding management (auto) wiring by name, by type, ...

Composition

a pojo is flat by nature

Lifecycle management

BeanFactory

Binding management

(auto) wiring

by name, by type, ...

hello world <bean id=”client” class=”Client”> <property name=”server”> <ref bean=”server”/> </bean> <bean id=server” class=”Server”/>

<bean id=”client” class=”Client”>

<property name=”server”>

<ref bean=”server”/>

</bean>

<bean id=server” class=”Server”/>

another example <bean id=”dao” class=”MyDao”> <property name=”dataSource”> <ref bean=”dataSource”/> </bean> <!--local--> <bean id=”dataSource class=”BasicDataSource”> <property name=”driverClassName” value=””/> <property name=”url” value=”..”/> </bean> <bean id=”remoteDataSource” class=”org.springframework.jndi.JndiObjectFactoryBean”> <property name=”...” > </bean> To change datasource, change the value referenced in the dao component

<bean id=”dao” class=”MyDao”>

<property name=”dataSource”>

<ref bean=”dataSource”/>

</bean>

<!--local-->

<bean id=”dataSource class=”BasicDataSource”>

<property name=”driverClassName” value=””/>

<property name=”url” value=”..”/>

</bean>

<bean id=”remoteDataSource” class=”org.springframework.jndi.JndiObjectFactoryBean”>

<property name=”...” >

</bean>

Spring + AOP Spring v 1.x : proxies around pojos Spring 2.x : proxies + aspectj load-time weaving

Spring v 1.x : proxies around pojos

Spring 2.x : proxies + aspectj

load-time weaving

Spring + SCA