[Spring] Spring -Framework,Modules and Projects

Spring -Framework,Modules and Projects

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Spring core : IOC Container, Dependency Injection, Auto Wiring, …

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• These are the fundamental building blocks to:
  • Building web applications
  • Creating REST API
  • Implementing authentication and autorization
  • Talking to a database
  • Integrating with other systems
  • Writing great unit tests
• Let’s now get a Spring Big Picture:
  • Spring Framework
  • Spring Modules
  • Spring Projects

Spring Framework contains multiple Spring Modules:

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  • Fundamental Features : Core (IOC Container, Dependency Injection, Auto Wiring, …)
  • Web: Spring MVC etc (Web applications, REST API)
  • Web Reactive : Spring WebFlux etc
  • Data Access : JDBC, JPA etc
  • Integration : JMS etc
  • Testing : Mock Objects, Spring MVC Test etc
• No Dumb Question : Why is Spring Framework divided into Modules?
  • Each application can choose modules they want to make use of
  • They do not need to make use of everything in Spring framework!

Spring Projects

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• Application architectures evolve continuously
  • Web > REST API > Microservices > Colud > …
• Spring evolves through Spring Projects:
  • First Project : Spring Framework
  • Spring Security : Secure your web application or REST API or microservice
  • Spring Data : Integrate the same way with different types of databases : NoSQL and Relational
  • Spring Integration : Address Challenges with integration with other applications
  • Spring Boot : Popular framework to build microservices
  • Spring Cloud : Build cloud native applications
• Hierachy : Spring Projects > Spring Framework > Spring Modules
• Why is Spring Eco system popular?
  • Loose Coupling : Spring manages creation and wiring of beans and dependencies
    • Make it easy to build loosely coupled applications
    • Make writing unit tests easy! (Spring Unit Testing)
  • Reduced Boilerplate code : Focus on Business Logic
    • Example : No need for exception handling in each method!
      • All checked exceptions are converted to Runtime or Unchecked Exceptions
    • Archtiectural Flexibility : Spring Modules and Projects
      • You can pick and choose which ones to use (You DON’T need to use all of them!)
    • Evolution with Time : Microservices and Cloud
      • Spring Boot, Spring Cloud etc!