Hands-On Microservices with Kotlin

Explicit context configuration

So far, we have used @Component or @Service to declare our beans that later on, when the SpringBoot application starts, will add to the Spring context by the component scan. However, we may want to explicitly declare our beans using a Configuration class:

import org.springframework.context.annotation.Beanimport org.springframework.context.annotation.Configuration@Configurationclass ContextConfiguration {  @Bean  fun accountService() = AccountService()  @Bean  fun customerService(accountService: AccountService) = CustomerService(accountService)  @Bean  fun customerController(customerService: CustomerService) = CustomerController(customerService)}

Since we now have a constructor injection, we need to specify our bean ...