Create tool to synchronize db4o table with data from FoxPro Table On A Windows Server

My customers have Visual FoxPro applications that run on a Windows Server and I am creating new Java db4o Client Applications that talk to a Uniscala Granite Website [login to view URL] A db4o database has to be built that will synchronize data from a Windows Server A scala Application utilizing this framework needs to be built that can update a local db4o table. A tool that creates (AND OR) updates the structure of a server db4o database has to be made if fields are added to the local Visual FoxPro database. Data inside the server db4o database should not ever be old, the data has to synchronize quickly and often. Some clients will be migrating to a Linux Server, but for now they are either running on A Windows Client or Windows Clients talking to a Windows Server