I have to intergrate JBoss portal with payment system. Scenario looks like the following: user clicks "Proceed with payment" button on the portlet and then is being redirected to the secure page to enter his credit card details. On completion, payment system sends POST request back to notify server about payment results (success/failure). While it is absolutely not a problem in the servlet environment, we do not have any ideas how to intercept POSTs in a portal. Any suggestions please?