英文:
Apache Camel Mapstruct integration
问题
在我的Springboot Camel微服务中，我使用以下依赖集成了Camel MapStruct：
<camel.version>3.20.1</camel.version>
<mapstruct.version>1.5.3.Final</mapstruct.version>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.apache.camel.springboot</groupId>
<artifactId>camel-spring-boot-starter</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.apache.camel.springboot</groupId>
<artifactId>camel-mapstruct-starter</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct</artifactId>
<version>${mapstruct.version}</version>
</dependency>
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${mapstruct.version}</version>
<scope>provided</scope>
</dependency>
我还有一个类似以下的映射器：
@Mapper(componentModel = "spring")
public interface CamelTestMapper {
@BeanMapping(nullValueMappingStrategy = NullValueMappingStrategy.RETURN_DEFAULT)
CamelTestDto mapCamelTestEntity(CamelTestEntity camelTestEntity);
}
以及一个路由如下：
from("direct:get-by-id")
.routeId("db-get-by-id-route")
.transacted()
.process(camelTestSampleDatabaseProcessor)
.log(LoggingLevel.INFO, "Retrieved entity from db with name: ${body.name}")
.to("mapstruct:org.example.model.dto.CamelTestDto")
.log(LoggingLevel.INFO, "Mapped new Dto: ${body}");
你遇到问题的地方是使用 .convertBodyTo(CamelTestDto.class) 时抛出异常。异常信息是由于Camel无法找到合适的类型转换器。这是因为使用 .convertBodyTo 时，Camel 试图将消息体从 org.example.model.entity.CamelTestEntity 转换为 org.example.model.dto.CamelTestDto，但没有可用的类型转换器。
在你的场景中，你应该继续使用 to("mapstruct:org.example.model.dto.CamelTestDto") 来调用 MapStruct 映射器，这是正确的方式来执行映射。确保你的映射器配置正确，这样它将自动处理实体到 DTO 的映射。
你已经在应用的 application.yml 中进行了正确的配置：
camel:
component:
mapstruct:
mapper-package-name: org.example.mapper
这将确保 Camel MapStruct 组件可以找到你的映射器。
至于列表的转换，你可以创建一个映射器方法，用于将实体列表映射为 DTO 列表，例如：
List<CamelTestDto> mapCamelTestEntities(List<CamelTestEntity> camelTestEntities);
然后在你的路由中使用这个方法来进行列表的映射。如果你有其他问题或需要更多示例，请随时提出。
英文:
In my Springboot Camel microservice I integrate camel mapstruct with this dependency:
<camel.version>3.20.1</camel.version>
<mapstruct.version>1.5.3.Final</mapstruct.version>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.apache.camel.springboot</groupId>
<artifactId>camel-spring-boot-starter</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.apache.camel.springboot</groupId>
<artifactId>camel-mapstruct-starter</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct</artifactId>
<version>${mapstruct.version}</version>
</dependency>
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${mapstruct.version}</version>
<scope>provided</scope>
</dependency>
I also have a mapper like this:
@Mapper(componentModel = "spring")
public interface CamelTestMapper {
@BeanMapping(nullValueMappingStrategy = NullValueMappingStrategy.RETURN_DEFAULT)
CamelTestDto mapCamelTestEntity(CamelTestEntity camelTestEntity);
}
and a route like this:
from("direct:get-by-id")
.routeId("db-get-by-id-route")
.transacted()
.process(camelTestSampleDatabaseProcessor)
.log(LoggingLevel.INFO, "Retrieved entity from db with name: ${body.name}")
.to("mapstruct:org.example.model.dto.CamelTestDto")
.log(LoggingLevel.INFO, "Mapped new Dto: ${body}");
I can't understand why in this way it works, and when I use
.convertBodyTo(CamelTestDto.class)
it throw this exception:
org.apache.camel.InvalidPayloadException: No body available of type: org.example.model.dto.CamelTestDto but has type: org.example.model.entity.CamelTestEntity on: Message[4939598FD4DFE7C-0000000000000103].
Caused by: No type converter available to convert from type: org.example.model.entity.CamelTestEntity to the required type: org.example.model.dto.CamelTestDto. Exchange[4939598FD4DFE7C-0000000000000103].
Caused by: [org.apache.camel.NoTypeConversionAvailableException - No type converter available to convert from type: org.example.model.entity.CamelTestEntity to the required type: org.example.model.dto.CamelTestDto]
Obviously I already set the application .yml in this way:
camel:
component:
mapstruct:
mapper-package-name: org.example.mapper
Does anyone know how to solve it? Can you give to me some examples of how to use this integrations? Also with conversion with List please.
答案1
得分: 1
近期camel-mapstruct-starter针对SB出现了一个bug，当您在路由中没有使用mapstruct作为组件时，它无法正确地自动配置自身。
这将在即将发布的Camel版本中修复：
https://issues.apache.org/jira/browse/CAMEL-19181
英文:
There was a recent bug in camel-mapstruct-starter for SB that it did not auto-configure itself correctly, when you did not use mapstruct as a component in the routes.
This will be fixed in upcoming Camel releases:
https://issues.apache.org/jira/browse/CAMEL-19181
答案2
得分: 0
I have not tried this, but I'm guessing Camel wants a bean annotated as a typeconverter to use for the .convertBodyTo directive.
Since the actual converter is a generated class I'm not sure how you would do that... maybe there's a way to define it in an XML file Camel reads.
英文:
I have not tried this, but I'm guessing Camel wants a bean annotated as a typeconverter to use for the .convertBodyTo directive.
Since the actual converter is a generated class I'm not sure how you would do that... maybe there's a way to define it in an XML file Camel reads.
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