Spring fundamentals
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This document provides an overview of Spring fundamentals including dependency injection, the Spring IoC container, bean configuration, bean scopes, the bean lifecycle, AOP with Spring, testing with Spring, and topics beyond the Spring basics. It discusses how Spring addresses common problems developers face through its features like dependency injection and aspects.
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Spring fundamentals
- 1. Spring FundamentalsDoing it right ….inversely
- 2. AgendaWhy DI and SL vs DI.Dependency injection and The Spring IoC containerVarious approaches of Bean ConfigurationBean scopesBean LifecycleAOP with SpringSpring AspectJ integrationTesting with SpringBeyond Spring Basics
- 3. Building OO systemsIts all about ObjectsIts all about Instantiating objectsIts all about communicating between the objectsIts all about collaborating objects Its all about managing objectsIts all about extending objectsIts all about monitoring objects
- 4. But the problem isEverythingdoneBy Developer
- 5. What developers end upWriting to much boilerplateCoding the same patterns againDuplicationsManaging infrastructureEntangled interfacesComplicated Dependencies
- 6. End up spending time
- 7. You eventually end up with
- 8. S.O.L.I.D The Single Responsibility PrincipleThe Open Closed PrincipleThe Liskov Substitution PrincipleThe Interface Segregation PrincipleThe Dependency Inversion Principle
- 9. SRP: class should have one, and only one, reason to change
- 10. OCP: extend a classes behavior, without modifying it
- 11. LSP - Derived classes must be substitutable for their base classes
- 12. ISP: Make client specific fine grained interfaces
- 13. DIP: Depend on abstractions, not on concretions
- 14. DI ApproachesPre DIConstruction by handFactory PatternService Locator
- 15. DI FrameworksHollywood principleObjects are handed to youNew and Factories - Not your concernWell managed BeansFirst class Bean scope supportNo/less boilerplate TestabilitydependencyInjectordependencyClient
- 16. Spring Framework
- 17. Spring IOC ContainerInstantiates BeansAssembles BeansManages BeansConfigure dependenciesInjects dependencies
- 19. Bean ConfigurationsXML ConfigurationJava ConfigurationAnnotation-driven configurationDynamic language configuration supportGroovy
- 20. Beanshell
- 21. JRubyInjecting dependenciesSupports Constructor,Method and Setter InjectionIntra-Bean dependencies bootstrappingAutowire : byName, byType, Constructor, AutodetectEnsure type safetyFirst class support PrimitivesStringsCollections : <list/>, <set/>, <map/>, and <props/> Nulls : <null/>
- 22. Bean scopesSingletonPrototypeRequestSessionGlobal SessionSupports Custom Scopes
- 23. Bean Lifecycle
- 25. Aspect oriented programmingOriginated at Xerox PARC during 95-96 under Gregorkiczales.Purposed towards OO Principles advancements forModularizationSeparation of concernsNon intrusive plug-abilityStructural PatternsProxyDecorator
- 26. Proxy Pattern“provide a surrogate or placeholder for another object to control access to it “ [GOF 94]
- 27. Manifestation of proxyVirtual proxyRemote proxySecurity proxySmart Reference proxy
- 28. Decorator Pattern“Allows new/additional behavior to be added to an existing class dynamically” [Wikipedia]
- 29. Decorator manifestation//Construct the BufferedInputStream object bufferedInput = new BufferedInputStream(new FileInputStream(filename));
- 30. Graduate to AOPEnforce inheritance to achieve concern of separation?Specification like EJB have weird inheritance, your class never implement your interface ..huh Why not use POJOs and apply CCC on them thru runtime magic ?
- 31. OOP vs AOP
- 32. AOP Lingo and JargonsAspect – The CCC that can be modularizedAdvice – Functionality of an Aspect (logging)Jointpoint – Opportunities in program execution to apply advicePointcut – Exact jointpoint where advice are weavedWeaving :linking objects with other applicatin objects
- 33. Spring AOPSupports only method join pointsSupports only load-time weavingAdvise typesBeforeAroundAfter –returningAfter–throwingAfter – finally
- 34. Spring @AspectJIntegrationAnnotation based support as of AspectJ 5.x@Aspect@Pointcut@ execution@ within@ target@annotation
- 35. AOP applicationsTrace aspectPerformance monitoring aspectAuditing aspectTransaction managementaspectLogging aspectSecurity aspectCaching aspect
- 36. Testing with SpringSupport for Unit and integration testingSupport JUnit 3.8.x/4.x and TestNG.Readymade mocks for most JEE dependencies like JNDI, Servlet API, etcSpring TestContextFrameworkSupports Fixture wiring transparentlySupport bean cachingTransaction managementExtensive spring-specific support
- 37. Beyond Spring basicsSpring MVCSpring DAOSpring ORNSpring JEE (JMS/JCA/JMX/Remoting)Spring Web flowSpring ROOSpring IntegrationSpring Security
- 38. Books
- 39. Did you get it