autowired - How to set up a spring based java library?

Question

I am trying to create a java library that uses spring. But I am not able to find any resources that shows you how to set up component scan and load all beans when you do not have a main entry point into the application.

question from:https://stackoverflow.com/questions/65904372/how-to-set-up-a-spring-based-java-library

Answer 1

A common approach used by spring is to define a @EnableXXXX and let the client of your library to enable it by annotating it on their configuration class. Something like :

@Target(ElementType.TYPE)
@Import(FooLibarayConfiguration.class)
@Documented
public @interface EnableFooLibaray{

}

@ComponentScan("xxxxx")
@Configuration
public class FooLibarayConfiguration{

}

And client enables your library by :

@EnableFooLibaray
@Configuration
public class Application{

}

The @Import actually supports a more dynamic way to include the bean settings for your library. You can refer to many existing @EnableXXX provided by spring such as @EnableAsync , @EnableWebSecurity , @EnableTransactionManagement , @EnableCaching etc. for many examples.