Invoking ActiveBPEL Process from Oracle

Question

Hi,
I've a problem when trying to invoke a process that is deployed in ActiveBPEL Open Source Engine as Web Service.Short description of the (simple) scenario:
I defined a BPEL Process in Oracle that receives a message (containing two strings) and delegates it to the Active BPEL Process which concatenates these string and returns to resutling string to the Oracle Process. Then the result is returned to the client.
Deployment of the process works fine, but my Problem is that when starting the BPEL Process the invocation of the other process failed. I analyzed the reason for that and found out that Oracle changes message parts order for the invoke inputVariable. That is the WSDL definition of the ActiveBPEL process is the following
<wsdl:message name="echoMessage">
<wsdl:part name="echoPart1" type="xsd:string"/>
<wsdl:part name="echoPart2" type="xsd:string"/>
</wsdl:message>
and in the Variable definition defines "echoPart2" as the first message part and sends
<echPart2></echPart2>
<echPart1></echPart1>
to the ActiveBPEL process and the process can't handle this. So the Oracle process never gets an answer from the ActiveBPEL process.
The WSDL is auto-generated from ActiveBPEL.
My question is: Are there any ideas to influence this behaviour of changing the variable definitions order. Why does Oracle change the order defined in the WSDL-File. Is a XSD-Schema file recommeded?
Thanks in advance for your help!
Greetings
Sven

Answer 1

The namespace is defined! Now I add the complete WSDL-Definition:
<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions name="echo1_1" targetNamespace="http://www.diplom.de/ns/echo1_1" xmlns:tns="http://www.diplom.de/ns/echo1_1" xmlns:plnk="http://schemas.xmlsoap.org/ws/2003/05/partner-link/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
<wsdl:message name="echoCallback">
<wsdl:part name="result" type="xsd:string"/>
</wsdl:message>
<wsdl:message name="echoMessage">
<wsdl:part name="echoPart1" type="xsd:string"/>
<wsdl:part name="echoPart2" type="xsd:string"/>
</wsdl:message>
<wsdl:portType name="echoPortType">
<wsdl:operation name="doIt">
<wsdl:input message="tns:echoMessage"/>
<wsdl:output message="tns:echoCallback"/>
</wsdl:operation>
</wsdl:portType>
<plnk:partnerLinkType xmlns:plnk="http://schemas.xmlsoap.org/ws/2003/05/partner-link/" name="echoPLT">
<plnk:role name="echo_Provider">
<plnk:portType name="tns:echoPortType"/>
</plnk:role>
</plnk:partnerLinkType>
</wsdl:definitions>
The error does not occure, when I'm defining the types in a XSD-File. But I still cannot invoke my ActiveBPEL process from the Oracle BPEL Engine. The process will be timed out in the BPEL-Console.
Any experiences with this?