Scorware - Spring Introduction
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Spring is a Java/JEE application framework that uses dependency injection and inversion of control. It supports integration with ORM tools, web frameworks, and remoting protocols. Spring promotes the Hollywood principle of "don't call me, I'll call you" through its core IOC module where objects are configured from outside rather than constructed within client code. This allows components to be wired together and dependencies to be configured externally via XML.
![SCOrWare Introduction to Spring Paris, 31/05/2007 [email_address]](https://image.slidesharecdn.com/scorware-spring-introduction-13504/85/Scorware-Spring-Introduction-1-320.jpg)
Scorware - Spring Introduction
- 1. SCOrWare Introduction to Spring Paris, 31/05/2007 [email_address]
- 2. What is Spring Java/JEE Application Framework Main target: JEE Web Applications Apache 2 License Hosted on SourceForge Business objects as POJO
- 3. 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,
- 4. 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, ...)
- 5. hello world <bean id=”client” class=”Client”> <property name=”server”> <ref bean=”server”/> </bean> <bean id=server” class=”Server”/>
- 6. 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
- 7. Spring + AOP Spring v 1.x : proxies around pojos Spring 2.x : proxies + aspectj load-time weaving