Enabling Correlation ID with XPATH extraction from payload
The XPATH parser allows to build the correlation ID using JXPath expressions. For more information, see http://commons.apache.org/proper/commons-jxpath/users-guide.html.
To enable the Correlation ID policy with XPATH extraction from payload, upload the following XPATH Correlation ID policy to the Service Registry and attach it to a service:
<wsp:Policy Name="wspolicy_schema_correlation_id" xmlns:wsp="http://www.w3.org/ns/ws-policy">
<wsp:ExactlyOne>
<wsp:All>
<tpa:CorrelationID xmlns:tpa="http://types.talend.com/policy/assertion/1.0" type="xpath" name="customer">
<tpa:Namespace prefix="ns2" uri="http://customerservice.example.com/"/>
<tpa:Part name="customerFirstName" xpath="/ns2:getCustomersByName/firstname"/>
<tpa:Part name="customerLastName" optional="true" xpath="/ns2:getCustomersByName/lastname"/>
</tpa:CorrelationID>
</wsp:All>
</wsp:ExactlyOne>
</wsp:Policy>When you apply it to the above SOAP message:
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<ns2:getCustomersByName xmlns:ns2="http://customerservice.example.com/">
<firstname>Alfred</firstname>
<lastname>Nobel</lastname>
</ns2:getCustomersByName>
</soap:Body>
</soap:Envelope>You get the following SOAP message with the Correlation ID policy attachment:
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Header>
<correlationId xmlns="http://www.talend.com/esb/sam/correlationId/v1">customer#customerFirstName=Alfred;customerLastName=Nobel</correlationId>
</soap:Header>
<soap:Body>
<ns2:getCustomersByName xmlns:ns2="http://customerservice.example.com/">
<firstname>Alfred</firstname>
<lastname>Nobel</lastname>
</ns2:getCustomersByName>
</soap:Body>
</soap:Envelope>