如何在 camel-context.xml 中使用 xpath 来检查特定节点是否存在 [英] how to use xpath in camel-context.xml to check if a particular node is exist or not

问题描述

我正在尝试开发基于内容的路由骆驼应用程序.此应用程序将查看文件夹 src/data 以查看是否存在具有节点 <e2d:getOrderDetaiRequest> 的 SOAP 请求文件，然后将该文件复制到目标/消息中，否则该文件将被复制到目标/其他.

I am trying to develop a content-based routing camel application. This application will look at the folder src/data to see if there is a SOAP request file that has node <e2d:getOrderDetaiRequest>, then that file will be copy into target/message, otherwise the file will be copy to target/other.

你知道如何使用 xpath(或任何其他工具)来检查这种情况(我更喜欢使用 camel-context.xml 文件)吗?

这是我的骆驼背景

<route>
        <from uri="file://c:/src/data?noop=true"/>
        <choice>
           <when>
            <xpath>**???????????????????????????**</xpath>
                <to uri="file://c:/target/message"/>
           </when>
           <otherwise>
            <to uri="file://c:/target/other"/>
           </otherwise>
        </choice>
    </route>

这里是 2 个不同 SOAP 请求的示例

And here is the sample of 2 different SOAP requests

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:e2d="http://www.abc.com/Abc11WS">
   <soapenv:Header/>
   <soapenv:Body>
      <e2d:getOrderDetailRequest>
         <actionCode>1234</actionCode>
      </..>
   </...></...>

和

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:lsr="http://www.abc.com/Abc22WS">
   <soapenv:Header/>
   <soapenv:Body>
      <lsr:getProductDetailsRequest>
           <productId>12345</...>
     </...></...></...>

推荐答案

当使用 xpath 并且你的 xml 有命名空间时，比如你的 SOAP 消息，那么你也必须在 xpath 表达式中使用命名空间.

When using xpath and your xml has namespaces, such as your SOAP message, then you must use namespaces in the xpath expression as well.

Camel 文档中有一些详细信息:http://camel.apache.org/xpath

There is some details at the Camel docmentation at: http://camel.apache.org/xpath

通过在 Camel 中使用 XML DSL，您可以直接在 XML 标签中声明命名空间，例如在 camelContext 等中.

By using the XML DSL in Camel you can declare the namespace in the XML tag directly such as in the camelContext etc.

<camelContext xmlns="http://camel.apache.org/schema/spring" e2d="http://www.abc.com/Abc11WS">
   ...
   <when>
     <xpath>/e2d:getOrderDetailRequest</xpath>
       ...

但请注意，XPath 可能有点难以正常工作.这就是我们在 Camel 2.10 中添加 logNamespaces 的原因.请参阅本页底部的详细信息:http://camel.apache.org/xpath

But mind that XPaths can be a bit tricky to get working correctly. And that is why we added the logNamespaces in Camel 2.10. See details in the bottom of the this page: http://camel.apache.org/xpath

这篇关于如何在 camel-context.xml 中使用 xpath 来检查特定节点是否存在的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！