Dynamic Partnerlink Properties?

Question

I am doing a HTTP Post "web service" call - and setting up some necessary HTTP header properties by adding them in my bpel.xml as custom partnerLink properties...
<partnerLinkBinding name="MyHTTPWebService">
<property name="From">DIATOCCD</property>
<property name="MessageName">D8_REQ_CREATE</property>
<property name="OrigUser">MyUsername</property>
<property name="Password">MyPassword</property>
</partnerLinkBinding>
This works fine. These properties come across in the HTTP Post as HTTP Headers. Now the customer wants me to add a new HTTP Header - and make the value dynamic at run-time. As far as I can tell, this is not possible. But maybe I'm missing something obvious. So they'd want something like this ...
<partnerLinkBinding name="MyHTTPWebService">
<property name="From">DIATOCCD</property>
<property name="MessageName">D8_REQ_CREATE</property>
<property name="OrigUser">MyUsername</property>
<property name="Password">MyPassword</property>
<property name="TransactionID">10001</property> (this value would be determined at run-time)
</partnerLinkBinding>
Any ideas?
Thanks!
Rod

Answer 1

I am now attacking this a bit differently. I have abandoned the WSIF method of doing HTTP Binding - and am writing some Java code in a Java Embedding component to do the HTTP POST "manually". Not pretty - but it allows me to dynamically set my HTTP Headers in the Java code. Does anyone know what disadvantages this may cause (performance, robustness, etc.)?
Thanks for any help.
Rod