Component vs @Service in Spring | An Actual Answer

Are you confused on what's the difference between @Component and @Service in Spring? Your not alone! The confusion over when to use @Service vs. @Component is felt by all who learn Spring. In this post, you'll learn when and why you should favor the @Service over @Component annotation through some actual use cases.


00:00 Start of Tutorial
02:18 Demo Walk Through | Spring Boot Application suing @Component and @Service
08:21 Spring AOP with @Service | Creating an Aspect
15:15 Extra AOP with @Service | Composite Annotation
17:10 Summary

Why use @Service in Spring?
The commonly repeated answer given is "intent". Meaning that it's intent is to clearly identify and document your applications business layer's entry point (AKA: Your Service Layer). This is considered a best practice.

When to use @Service in Spring | Use Cases
Over the years, I have encountered actual use cases for when to use @Service over @Component. Have you ever heard of AOP (Aspect Oriented programming) ? I´ll show you some interesting use cases on how to use AOP and @Service to add more functionality than just "intent"

@Component vs @Service in Spring
Although Spring's @Service doesn't add any extra functionality over @Component out of the box, the @Service annotation becomes very useful when used with Spring AOP in targeting your business layer entry point and injecting a service of your own. You will improve the maintainability of your AOP Pointcut expressions which read as clearly as your intent.

You can read the MVP Java Blog "Component vs @Service in Spring | An Actual Answer "Post here:
http://mvpjava.com/component-vs-service-spring/

Check out some more Spring related tutorials here ..
https://youtu.be/VeFr1CRFdC4 (Spring Boot Integration Testing)
https://youtu.be/K60vyIHAUOQ (Spring Boot and JUnit 5)
https://youtu.be/3McRajvmdlw (Spring Caching with Caffeine Cache)
https://youtu.be/hjeSOxi3uPg (Spring Boot and Java FX)
https://youtu.be/FXJPA3IqANg (Introduction to Spring Boot)

Source code available on MVP Java's GitHub account:
https://github.com/mvpjava/service-aop
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