One of the qooxdoo contribution projects is RPCJava (http://qooxdoo.org/contrib/project#rpcjava). In early versions of qooxdoo, the server components were also bundled as the backend in the qooxdoo SDK. As it evolved, the server components have been separated into contribution projects to allow those components to grow independently from the qooxdoo client framework.
Let's set up the server development environment. To do so, just follow these steps: