379.4. 在 Spring DSL 中使用 YAML

在 Spring DSL 中使用数据格式时，您需要首先声明数据格式。这是在 DataFormats XML 标签中进行的。

<dataFormats>
  <!--
    here we define a YAML data format with the id snake and that it should use
    the TestPojo as the class type when doing unmarshal. The unmarshalTypeName
    is optional
  -->
  <yaml
    id="snake"
    library="SnakeYAML"
    unmarshalTypeName="org.apache.camel.component.yaml.model.TestPojo"/>

  <!--
    here we define a YAML data format with the id snake-safe which restricts the
    classes to be loaded from YAML to TestPojo and those belonging to package
    com.mycompany
  -->
  <yaml id="snake-safe">
    <typeFilter value="org.apache.camel.component.yaml.model.TestPojo"/>
    <typeFilter value="com.mycompany\..*" type="regexp"/>
  </yaml>
</dataFormats>

然后您可以引用路由中的 id：

  <route>
    <from uri="direct:unmarshal"/>
    <unmarshal>
      <custom ref="snake"/>
    </unmarshal>
    <to uri="mock:unmarshal"/>
  </route>
  <route>
    <from uri="direct:unmarshal-safe"/>
    <unmarshal>
      <custom ref="snake-safe"/>
    </unmarshal>
    <to uri="mock:unmarshal-safe"/>
  </route>