ConnectionFactory cfconn = new ConnectionFactory();
            cfconn.setUri(uri);
            Connection conn = cfconn.newConnection();
            Channel ch = conn.createChannel();
            RpcClient service = new RpcClient(ch, "", "Hello");
            System.out.println(service.stringCall(request));
            conn.close();
        } catch (Exception e) {
            System.err.println("Main thread caught exception: " + e);
            e.printStackTrace();
            System.exit(1);