Call webservice without input message

Question

Hi.
I have webservice which doesn't need input message. For example stack cleaner.
<wsdl:message name="eraseStackRequest">
</wsdl:message>
<wsdl:message name="eraseStackResponse">
<wsdl:part element="impl:result" name="result"/>
</wsdl:message>
<wsdl:portType name="Stack">
<wsdl:operation name="eraseStack">
<wsdl:input message="impl:eraseStackRequest" name="eraseStackRequest"/>
<wsdl:output message="impl:eraseStackResponse" name="eraseStackResponse"/>
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="StackSOAPSoapBinding" type="impl:Stack">
<wsdlsoap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
<wsdl:operation name="eraseStack">
<wsdlsoap:operation soapAction=""/>
<wsdl:input name="eraseStackRequest">
<wsdlsoap:body use="literal"/>
</wsdl:input>
<wsdl:output name="eraseStackResponse">
<wsdlsoap:body use="literal"/>
</wsdl:output>
</wsdl:operation>
Is there possibility call this service from BPEL. JDeveloper require input message.
When I create input variable and assign value to it, I get error.
Thanks.

Answer 1

You can try something like this:
Variables:
<variables>
<!-- Reference to the message passed as input during initiation -->
<variable name="inputVariable" messageType="client:BPELProcess1RequestMessage"/>
<!-- Reference to the message that will be sent back to the requester during callback -->
<variable name="outputVariable" messageType="client:BPELProcess1ResponseMessage"/>
</variables>
Assign:
<assign name="EmptyAssign">
<copy>
<from variable="inputVariable" part="payload" query="/ns1:Balance/ns1:Empty"/>
<to variable="outputVariable" part="payload" query="/ns1:Balance/ns1:Empty"/>
</copy>
</assign>
The xsd user:
<?xml version="1.0" encoding="windows-1252"?>
<schema xmlns:tns="http://xmlns.oracle.com/bpel/samples/Dummy"
attributeFormDefault="unqualified" elementFormDefault="qualified"
targetNamespace="http://xmlns.oracle.com/bpel/samples/Dummy"
xmlns="http://www.w3.org/2001/XMLSchema"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<element name="Empty"/>
<element name="Balance">
<complexType>
<sequence>
     <element name="Empty"/>
<element name="Message" type="tns:messageType"/>
</sequence>
</complexType>
</element>
<complexType name="messageType">
<sequence>
<element name="subject" type="xsd:string"/>
<element name="content" type="xsd:string"/>
<element name="address" type="xsd:string"/>
</sequence>
</complexType>
</schema>
]