code: public static Datasource datasource(final String node,
                                          final int port,
                                          final String resource) {
          return new Datasource(node, port, resource);
      }
docs: Creates a Datasource from node, port and resource descriptors.
  
  @param node the node of the datasource
  @param port the port used to access the datasource
  @param resource the resource accessed at the datasource
  
  @return Datasource