Invoking a REST service from an Eclipse AttributePart

I have a custom REST service running in the JazzTeamServer, and would like to invoke it from a custom AttributePart that I've written in Java, and which runs in the RTC Eclipse UI. Is there a recommended way to do this?

If it's as simple as using simple Java URL and URLConnection to invoke the service, is there a way to get the context root (the base URL) for the Jazz Team Server from within an AttributePart, so I don't have to hard-code it into the URL address?

Alternately, if Jazz provides any helper classes for accessing JTS REST services (like a RemoteServiceInvoker) that can be used from within a AttributePart within an RTC Eclipse plugin, can you point me to sample code?

Thanks!