Quick Answer: What Will Happen If We Interchange @Service And @Repository Annotation In The Spring MVC?

What is the difference between @component @repository @service and @controller?

@Component is a generic annotation.

Difference of @Service, @Repository, @Controller with @Component is they are special cases of @Component and used for particular purposes.

The difference is just classification only.

For all these annotations (stereotypes), technically the core purpose is same..

Is singleton thread safe in spring?

Spring singleton beans are NOT thread-safe just because Spring instantiates them. Sorry. Spring just manage the life cycle of singleton bean and maintains single instance of object. Thread safety has nothing to do with it.

What is the difference between @configuration and @component in Spring?

@Component Indicates that an annotated class is a “component”. Such classes are considered as candidates for auto-detection when using annotation-based configuration and classpath scanning. A @Configuration is also a @Component, but a @Component cannot act like a @Configuration.

What will happen if we interchange service and @repository annotation in the Spring MVC?

According to documentaion @Repository , @Service , @Controller are all synonyms. … For example, Spring Data JPA will process @Repository , and will try to replace with implementation any interface marked by this annotaion. Spring also will apply automatic exception translation to such classes.

What’s the difference between @component @controller @repository and @service annotations in spring?

The difference between them is, @component is used to annotate compound classes, @Repository is a marker for automatic exception translation in the persistence layer, for service layer we need to use @service. You can refer Spring Documentation to know more.

What is the use of @service annotation in spring?

@Controller annotation is an annotation used in Spring MVC framework (the component of Spring Framework used to implement Web Application). The @Controller annotation indicates that a particular class serves the role of a controller.