1. An Survey of Spring Chris Roeder March, 2011 This talk summarizes a lot of what is available in: Spring In Action , Craig Walls, Manning 2008

3. Remote Access Framework

4. Spring Dynamic Modules

5. Aspects – a way to deal with “cross cutting concerns”

6. MVC – an alternative to web application frameworks like Struts

8. Uses existing anything: ORM, transactions, Aspects, Remoting, etc.

9. Spring is there to provide “portability” between frameworks that share a purpose and interface

12. Leaving your code simple and full of POJOs (more later)

13. When needs require a different implementation, very easy to change the config file with no code changes

17. Dependency Injection is a more specific concept that refers to setting values on objects (Java Beans) from an external source.

18. Spring calls the framework IoC.

19. I call the concept used here DI.

21. Even with good modularity, you still hard-code them together with code like this:

22. public static void main(String args[]) { DataProvider dp = new DataProvider(); CorpMetrics metrics = new CorpMetrics(); metrics.calculate(dp);

24. A JDBC setup finds its database connection by consulting JNDI, making environmental assumptions: Context initContext = new InitialContext(); Context envContext = (Context)initContext.lookup("java:/comp/env"); DataSource ds = (DataSource)envContext.lookup("jdbc/myoracle"); Connection conn = ds.getConnection(); ( http://tomcat.apache.org/tomcat-5.5-doc/jndi-datasource-examples-howto.html )

25. Changes still involve changing the java code.

27. Hard-coded constructor calls limit it.

28. Unit Testing with different configurations is made easier.

29. IoC is used as a supporting technology throughout Spring

32. Code to Interfaces

33. Create “new” implementations of Classes that implement them.

34. Easy to swap with a different implementation when both implement the same Java interface.

35. Also works to enable a kind of multiple inheritance in Java.

38. BTW, these are used in FLEX integration

41. Coding to Spring allows flexibility and growth

43. Abstracts the concept of remoting and provides different implementations.

44. Client and service objects are POJOs.

45. Can make use of JSR-181 Web Services Metadata annotations

47. provide another layer of encapsulation over the concept of Class. Now you can have private and public classes as members of a module (jar).

48. allow for a lifecycle, so module can have a “running” state.

49. provide better naming, so versions can be included.

50. provide restricted “class space”, allowing for more than one version of a class at the same time.

51. More: Yuriy is working on this

53. Logging, Transactions, Security

57. View – the JSP pages to render a web page