Orika ClassCastException in Spring Boot webapp

我有一个奇怪的ClassCastException，而映射一个实体到一个DTO与Orika在样例Spring Boot webapp我正在工作。当我试图在嵌入式Tomcat中对部署的应用程序进行映射时，我得到了异常，但是我可以在JUnit测试上下文中很好地进行映射。下面是相关的类(它们都很简单):

JPA实体:

@Entity
public class Position {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
    private String name;
    // getters/setters...
}

DTO:

public class PositionDto {
    private Integer id;
    private String name;
    // getters/setters...
}

Rest控制器:

@RestController
public class PositionController {
    @Autowired
    private PositionService positionService;
    @RequestMapping("/position")
    public PositionDto get() {
        final PositionDto positionDto = positionService.getPosition(1);
        return positionDto;
    }
}

服务类:

@Service
public class PositionServiceImpl implements PositionService {
    @Autowired
    private PositionRepository positionRepository;
    @Autowired
    private OrikaBeanMapper mapper;
    @Transactional(readOnly = true)
    @Override
    public PositionDto getPosition(final Position.ID id) {
        // This returns a populated Position object with id=1 and name = "Creator"
        final Position position = positionRepository.findOne(id.getId());
        // This is where the mapping occurs
        return mapper.map(position, PositionDto.class);
    }
}

OrikaBeanMapper类:

@Component
public class OrikaBeanMapper extends ConfigurableMapper implements ApplicationContextAware {        
    public OrikaBeanMapper() {
        super(false);
    }
    @Override
    protected void configureFactoryBuilder(final   DefaultMapperFactory.Builder factoryBuilder) {
        factoryBuilder.mapNulls(false);
    }
    // Omitted non-important methods
}

这是ClassCastException的堆栈跟踪:

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is ma.glasnost.orika.MappingException: While attempting the following mapping:
sourceClass = class com.dlizarra.startuphub.position.Position
destinationType = com.dlizarra.startuphub.position.PositionDto
resolvedStrategy = InstantiateAndUseCustomMapperStrategy<Position, PositionDto> {customMapper: GeneratedMapper<Position, PositionDto> {usedConverters: [], usedMappers: [], usedMapperFacades: [], usedTypes: [] }, unenhancer: ma.glasnost.orika.unenhance.BaseUnenhancer@73c3e10e, objectFactory: DefaultConstructorObjectFactory<PositionDto>}
Error occurred: java.lang.ClassCastException: com.dlizarra.startuphub.position.Position cannot be cast to com.dlizarra.startuphub.position.Position
-----begin dump of current state-----------------------------
Registered object factories: 1 (approximate size: 110.8 kB)
    [PositionDto] : {Position=DefaultConstructorObjectFactory<PositionDto>}
-------------------------------------------------------------------------------
Registered mappers: 1 (approximate size: 17,643.0 kB)
    [0] : GeneratedMapper<Position, PositionDto> {usedConverters: [], usedMappers: [], usedMapperFacades: [], usedTypes: [] }
-------------------------------------------------------------------------------
Registered concrete types: 5 (approximate size: 294.3 kB)
  [interface java.util.List] : ArrayList<Object>
  [interface java.util.Set] : LinkedHashSet<Object>
  [interface java.util.Collection] : ArrayList<Object>
  [interface java.util.Map] : LinkedHashMap<Object, Object>
  [interface java.util.Map$Entry] : MapEntry<Object, Object>
  -------------------------------------------------------------------------------
Resolved strategies: 1 (approximate size: 19,850.8 kB)
{source: Position, dest: PositionDto, in-place:false}:  InstantiateAndUseCustomMapperStrategy<Position, PositionDto>
{customMapper: GeneratedMapper<Position, PositionDto> {usedConverters: [],    usedMappers: [], usedMapperFacades: [], usedTypes: [] }, unenhancer:
ma.glasnost.orika.unenhance.BaseUnenhancer@73c3e10e, objectFactory:
DefaultConstructorObjectFactory<PositionDto>}
-------------------------------------------------------------------------------
Unenhance strategy: ma.glasnost.orika.unenhance.BaseUnenhancer@73c3e10e
-----end dump of current state-------------------------------] with root cause
java.lang.ClassCastException: com.dlizarra.startuphub.position.Position cannot be cast to com.dlizarra.startuphub.position.Position
at ma.glasnost.orika.generated.Orika_PositionDto_Position_Mapper43322711137530$0.mapAtoB(Orika_PositionDto_Position_Mapper43322711137530$0.java) ~[orika-core-1.4.6.jar:na]
at ma.glasnost.orika.impl.mapping.strategy.UseCustomMapperStrategy.map(UseCustomMapperStrategy.java:67) ~[orika-core-1.4.6.jar:na]
at ma.glasnost.orika.impl.MapperFacadeImpl.map(MapperFacadeImpl.java:742) ~[orika-core-1.4.6.jar:na]

我真的不知道这是怎么回事。我不明白它在哪里试图将Position转换为Position。这发生在每个实体/dto类中，而不仅仅是Position。

我可以映射任何这些类没有问题，当我单元测试任何方法，它工作完美，所有的字段得到正确映射，所以我不认为这是一个Orika配置问题。只有当我将webapp部署在嵌入式Tomcat中并且映射方法在rest控制器方法中被调用时，才会出现异常。

这是一个简单的Spring Boot应用程序，这是我在其中编写的第一个rest端点。也许我在配置中缺少了一些东西(我有@EnableAutoConfiguration，所以没有那么多配置)，但我猜不出是什么让Orika抛出这个异常。

任何关于这里可能发生的事情的想法或提示将非常感激。

谢谢!

我刚刚意识到有一个解决这个错误的方法，因为几个月前已经有了Spring Boot 1.4.0(我相信是这个版本)，当他们引入了通过属性文件自定义Dev Tools的可能性时。

要解决这个问题，我们只需:

在src/main/resources中创建META-INF文件夹

spring-devtools.properties

添加restart.include.orika=/orika-core.*.jar到文件

如文档中所述，restart.include将拉入'restart'类加载器中任何与Regex匹配的jar。例如，我们包含orika-core-1.4.6.jar文件

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