<int-ws:outbound-gateway id="wsOutboundGateway"
        request-channel="requestChannel"
        uri="{soapURI}"
        message-sender="httpMessageSender"
        message-factory="messageFactory"
        interceptor="myInterceptor"
        marshaller="jaxbMarshaller" unmarshaller="jaxbMarshaller">
        <int-ws:uri-variable name="soapURI" expression="headers.soapURI"/>
    </int-ws:outbound-gateway>