Hot deploy new integration cases

Hi,

We are developing a SaaS solution and want to offer to customers to seamlessly integrate their data flows with our solution. The way things are packaged for now is Spring integration is integrated in our solution's war. However, if we have to deploy a new integration use case for a customer, I understand that I will have to redeploy the whole app. Isn't there any way to hot deploy integration use cases and/or behave like a PaaS the same way Mule or WSo2 does ?

For me the concepts in Spring Integration are much simpler and clear than in other solutions. What I'm looking for is some 'best of both worlds' solution :)

Thanks for your help!