Give filter init param dynamically

I've successfully embedded Orbeon in my web application. I've followed the steps on this page https://doc.orbeon.com/form-runner/link-embed/java-api.html. I want to know while mentioning the filter init param of the form runner, can it be configured elsewhere rather than hardcoding in the web.xml file? I've a configuration file in XML format to contain the system properties. I want the form runner url to be specified in the config file and assign the filter init param dynamically to ther embedding servlet. The reason being, Orbeon war will be deployed at different servers for different clients. Thus I don't want to end up updating the web.xml for each client server. If they can be given in the config file, it would be convenient.