骆驼http组件未在exchange正文中设置响应

Question

我使用的是Camel版本3.2.0和Spring Boot版本2.2.6.Release。

我正在使用camel-http组件来使用一个rest服务，该服务以JSON格式返回产品列表。
我正在尝试存储在csv文件中。由于http响应没有设置在out in exchange中，因此正文为空。

<route id="getProducts">
    <from uri="quartz://groupName/timerName?cron=0 0/2 * 1/1 * ? *" />
    <setHeader name="CamelHttpMethod">
      <constant>GET</constant>
    </setHeader>
    <to uri="http://localhost:8080/product"></to>
    <log message=" before processor \n Body ${body} \n headers ${headers}"/>
    <!-- <process ref="processor" /> -->
    <log message=" before convert \n Body ${body} \n headers ${headers}"/>
    <marshal>
        <bindy type="Csv"  classType="com.basf.vo.Product"   />
    </marshal>
    <log message=" after convert \n Body ${body}"/>
    <to uri="file:\balachandar\?fileName=abc.csv"/>
    <log message="Products Received \n ============================= \n"/>
</route>


<log message=" before processor \n Body ${body} \n headers ${headers}"/> => It is printing Body {"productId":1,"name":"Pink Ralph Lauren Polo Shirt","category":"Dress"} in the console

<log message=" before convert \n Body ${body} \n headers ${headers}"/>  => It is not printing the body. Body is empty.

I used custom processor to know the body.

public void process(Exchange exchange) throws Exception {
    String msg = exchange.getIn().getBody(String.class);
    String msg1 = exchange.getMessage(String.class);
    System.out.println("Rest Response is:->" + msg);   //  Rest Response is:->
    System.out.println("Rest Response is:->" + msg1);  //  Rest Response is:->null

}

Answer 1

响应类型为流。当您记录响应时，第一次使用该流，并且数据已消失。您可以启用流缓存或将流转换为字符串( ),然后再对消息正文执行任何其他操作。