Mapstruct cannot find impl

Question

I am using mapstruct to transform a DTO into an object and vice versus and I am getting the following exception:

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.rppjs.customer.online.portal.dtos.mapper.UserMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1506)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1101)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1062)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:819)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:725)

I can see that UserMapper.impl is being generated but still the above exception. My code is on github on this branch 42_RenameCodeBaseToCustomerOnlinePortal. The code is pretty simple and not many lines of code. The exception is generated as part of the RegistrationEndpointIT.java .

Please could you take a look where I am going wrong? It is using a gradle wrapper.

Additionally, I get the following exception when running Application.java:

Description:

Parameter 0 of constructor in com.rppjs.customer.online.portal.endpoints.RegistrationEndpoint required a bean of type 'com.rppjs.customer.online.portal.dtos.mapper.UserMapper' that could not be found.

Action:

Consider defining a bean of type 'com.rppjs.customer.online.portal.dtos.mapper.UserMapper' in your configuration.

Please note, Application.java is a Spring boot application.

Answer 1

The problem is that RegistrationEndpoint uses the mapper as constructor argument. Since it is a component Spring wants to autowire it. But neither UserMapper nor UserMapperImpl are spring beans, therefore the exceptions.

You have two options:

1. Remove the UserMapper constructor argument and get your mapper with Mappers.getMapper(UserMapper.class) . Best practive would be to also public MAPPER instance inside your mapper (see the example here )

2. If you need autowired dependencies inside your mapper you can define your mapper as as spring bean as follows:

---

@Mapper(componentModel  = "spring")
@Component
public interface UserMapper() {
   //...
}