Mastruct with Quarkus: How to inject

[Brand Bintley]

I am trying to run a basic example that uses Mastructs as per https://mapstruct.org/news/2019-12-06-mapstruct-and-quarkus/.

In the resource, the author uses @Inject annotation to inject the mapper in the resource class. That causes an exception:

UnsatisfiedResolutionException: Unsatisfied dependency for type org.mapstruct.example.quarkus.PersonMapper and qualifiers [@Default]

However, if I remove the @Inject annotation as per this other article, no injection happens at all: https://stephennimmo.com/building-a-customer-api-using-quarkus-from-the-ground-up/. The mapper remains null.

What am I missing?

Thanks.

[Paul Carter-Brown]

Make sure you have @Mapper(componentModel = "CDI") on your mapper interface.

You can then happily inject it with @Inject

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[Brand Bintley]

Somehow this doesn't work for me. Here are my classes:

package org.mapstruct.example.quarkus;

public class Person {

private String firstname;

private String lastname;

// all-args constructor, getters, setters

}

package org.mapstruct.example.quarkus;

public class PersonDto {

  private String firstname;

  private String surname;  

  // getters, setters

}

=====

package org.mapstruct.example.quarkus;

import org.mapstruct.Mapper;
import org.mapstruct.Mapping;

@Mapper(componentModel = "CDI")
public interface PersonMapper {
    @Mapping(target = "surname", source = "lastname")
    PersonDto toResource(Person person);
}

=========

package org.mapstruct.example.quarkus;

import javax.inject.Inject;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

@Path("/person")
public class PersonResource {
 
  @Inject
  PersonService personService;
 
  @Inject
  PersonMapper personMapper;
 
  @GET
  @Produces(MediaType.APPLICATION_JSON)
  public PersonDto loadPerson() {
    return personMapper.toResource( personService.loadPerson() );
  }
}

=====

package org.mapstruct.example.quarkus;

import javax.enterprise.context.ApplicationScoped;

@ApplicationScoped

public class PersonService {

  public Person loadPerson() {

    return new Person("Bob", "Miller");

  }

}

[Paul Carter-Brown]

Do you have the mapstruct plugin as part of your build so it can do its source generation?

Verify it's running when you build

[KimJohn Quinn]

We do this and it works:

POM:

----------- Plugins

<plugin>

    <artifactId>maven-compiler-plugin</artifactId>

    <version>3.8.1</version>

    <configuration>

        <parameters>true</parameters>

        <source>11</source>

        <target>11</target>

        <annotationProcessorPaths>

            <path>

                <groupId>org.projectlombok</groupId>

                <artifactId>lombok</artifactId>

                <version>${lombok.version}</version>

            </path>

            <path>

                <groupId>org.projectlombok</groupId>

                <artifactId>lombok-mapstruct-binding</artifactId>

                <version>0.1.0</version>

            </path>

            <path>

                <groupId>org.mapstruct</groupId>

                <artifactId>mapstruct-processor</artifactId>

                <version>${mapstruct.version}</version>

            </path>

        </annotationProcessorPaths>

    </configuration>

</plugin>

----------- Dependencies

<dependency>

    <groupId>org.projectlombok</groupId>

    <artifactId>lombok</artifactId>

    <version>${lombok.version}</version>

    <scope>provided</scope>

</dependency>

<dependency>

    <groupId>org.projectlombok</groupId>

    <artifactId>lombok-mapstruct-binding</artifactId>

    <version>0.1.0</version>

    <scope>provided</scope>

</dependency>

<dependency>

    <groupId>org.mapstruct</groupId>

    <artifactId>mapstruct</artifactId>

    <version>${mapstruct.version}</version>

    <scope>provided</scope>

</dependency>

<dependency>

    <groupId>org.mapstruct</groupId>

    <artifactId>mapstruct-processor</artifactId>

    <version>${mapstruct.version}</version>

    <scope>provided</scope>

</dependency>

----------- Mapper Config

@MapperConfig(

    componentModel = "cdi",

    implementationName = "<CLASS_NAME>Impl",

    unmappedSourcePolicy = IGNORE,

    unmappedTargetPolicy = WARN,

    mappingInheritanceStrategy = AUTO_INHERIT_ALL_FROM_CONFIG,

    nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE)

public interface Mappable

{

}

----------- Mapper

@Mapper(config = Mappable.class)

public abstract class ProjectMapper 

{