Spring Integration 3.0.1 Restful http-inbound-gateway 不会将请求正文转换为对象

Question

我正在尝试使用 Spring Integration (3.0.1) 来实现一个 RESTful 服务，该服务支持 XML 和 JSON 作为请求和响应格式，使用 int-http:inbound-gateway。

我的代码基于 Spring 集成示例（尽管这不使用消息负载）：

https://github.com/spring-projects/spring-integration-samples/tree/master/intermediate/rest-http

服务激活器类：

@Service("httpOrderGateway")
public class HttpOrderGateway implements OrderGateway {

    private static final Logger LOGGER = Logger.getLogger(HttpOrderGateway.class);

    @Override
    public Message<CreateOrderResponse> createOrder(Message<CreateOrderRequest> orderRequest) {
        LOGGER.info("Received CreateOrderRequest headers: " + orderRequest.getHeaders());
        LOGGER.info("Received: " + orderRequest.getPayload());

        return MessageBuilder.withPayload(new CreateOrderResponse("Thank you for your order")).build();
    }

}

Spring 集成 XML：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
                            http://www.springframework.org/schema/beans/spring-beans.xsd
                            http://www.springframework.org/schema/integration 
                            http://www.springframework.org/schema/integration/spring-integration.xsd
                            http://www.springframework.org/schema/integration/http 
                            http://www.springframework.org/schema/integration/http/spring-integration-http.xsd
                            http://www.springframework.org/schema/oxm 
                            http://www.springframework.org/schema/oxm/spring-oxm.xsd"
       xmlns:int="http://www.springframework.org/schema/integration"
       xmlns:oxm="http://www.springframework.org/schema/oxm"
       xmlns:int-http="http://www.springframework.org/schema/integration/http">

    <int:annotation-config />  

    <int:channel id="orderRequestChannel" />
    <int:channel id="orderResponseChannel" />

    <int-http:inbound-gateway id="inboundOrderRequestGateway" 
                              supported-methods="POST"
                              request-channel="orderRequestChannel"
                              reply-channel="orderResponseChannel"
                              view-name="/order"
                              path="/services/order"
                              reply-timeout="50000">
    </int-http:inbound-gateway>

    <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
        <property name="order" value="1" />
        <property name="contentNegotiationManager">
            <bean class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
                <property name="defaultContentType" value="application/json" />
                <property name="mediaTypes">
                    <map>
                        <entry key="json" value="application/json" />
                        <entry key="xml" value="application/xml" />
                    </map>
                </property>
            </bean>
        </property>
        <property name="defaultViews">
            <list>
                <bean class="com.anon.order.gateway.json.view.ExtendedMappingJacksonJsonView">
                    <property name="objectMapper" ref="jaxbJacksonObjectMapper" />
                </bean>
                <bean class="org.springframework.web.servlet.view.xml.MarshallingView">
                    <constructor-arg ref="marshaller" />
                </bean>
            </list>
        </property>
    </bean>

    <oxm:jaxb2-marshaller id="marshaller" contextPath="com.anon.order.gateway.marshalling.model.impl" />

    <int:service-activator id="orderGatewayActivator"
                               input-channel="orderRequestChannel"
                               output-channel="orderResponseChannel"
                               ref="httpOrderGateway" 
                               method="createOrder" 
                               requires-reply="true"
                               send-timeout="60000" />

    <bean id="jaxbJacksonObjectMapper" class="com.anon.order.gateway.json.JaxbJacksonObjectMapper" />

</beans>

目前，代码退出：

Received: <CustomerServiceRequest><CustomerName>Robert Pulson</CustomerName></CustomerServiceRequest>

（或等效的 JSON 格式），并以 JSON 或 XML 格式返回响应，具体取决于 Accept Header，因此该部分正常工作。

我已阅读以下基于 Spring Integration 先前版本的类似问题：

Spring Integration : http:inbound-channel adapter - not getting json object in payload

但这使用的是inbound-channel-adaptor，而不是我使用的inbound-gateway。

如何配置我的inbound-gateway 以使用marshaller 和jaxbJacksonObjectMapper（来自同一个配置文件）将原始请求正文转换为JSON/XML 的CreateOrderRequest 实例？

Answer 1

配置适当的HttpMessageConverters 并使用message-converters 属性注入它们。

另请参阅merge-with-default-converters 属性。

请参阅MappingJackson2HttpMessageConverter（杰克逊 2）、MappingJacksonHttpMessageConverter（杰克逊 1.x）和 MarshallingHttpMessageConverter。

此外，如果 JAXB 和 Json 消息转换器位于类路径中，则默认情况下会自动使用它们。如果转换不需要任何特殊操作，您可以在网关上设置request-payload-type。

请参阅reference documentation 了解更多信息。