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Spring framework & inversion of control
The document discusses the Spring Framework and inversion of control (IoC). It explains that IoC is an OOP principle where modules depend on abstractions rather than concrete classes. This reduces coupling between modules. The Spring Framework implements IoC through dependency injection and a service locator. Dependency injection allows a client to set the dependencies of a module. The Spring Framework is lightweight, open source, and easy to test. It uses either XML or annotation-based configuration for dependency injection or service location.
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Spring framework & inversion of control
- 1. Spring Framework & Inversion of Control ByNazim Sitmanbetov
- 2. Preconditions Keep calm Sitback Relax
- 3. Inversion of Control OOP principle, not design pattern One of
- 4. Principle in OOP Modules depend on abstractions Low level modules do not depend on high level modules
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- 6. Low level modulesdo not depend on high level modules Bad Tip: Avoid cyclic dependencies Good
- 7. IoC implementations Factory Method Service Locator Dependency Injection (DI)
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- 10. Dependency Injection Allow clientof module to set dependency Module Client
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- 12. Framework Java Light-weight Open Source
- 13. What means Light-Weight? No container requirements Quick start Application easy-to-test
- 14. Spring & IoC Dependency Injection Service Locator
- 15. Spring & Dependency Injection XMLBased Configuration mcdonalds-with-kazatin.xml Java Program
- 16. Spring & ServiceLocator Annotation Based mcdonalds-locator.xml
- 17. Spring & ServiceLocator
- 18. Dependency Injection vs ServiceLocator DI Service Locator • Imperative • Can be used with existing classes • Declarative • Need to modify existing classes
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