how to use xpath in camel-context.xml to check if a particular node is exist or not

Question

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.

Do you know how to use xpath(or any other tools ) to check that condition (i prefer using camel-context.xml file)?

Here is my camel-context

<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>

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>
      </..>
   </...></...>

And

<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</...>
     </...></...></...>

Answer 1

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

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

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>
       ...

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