getdata (DBEngine)

        public Map<String,String> getdata(String id) {
        Map<String,String> dataMap = new HashMap<>();

        Statement stmt = null;
        try
        {
            Connection conn = ds.getConnection();
            String queryString = null;

            queryString = "SELECT * FROM data WHERE id='" + id + "'";

            stmt = conn.createStatement();

            ResultSet rs = stmt.executeQuery(queryString);

            while (rs.next()) {
                String patient_id = rs.getString("patient_id");
                String service_id = rs.getString("service_id");
                dataMap.put("id", id);
                dataMap.put("ts", ts);
                dataMap.put("patient_id", patient_id);
                dataMap.put("service_id", service_id);
                dataMap.put("some_data", some_data);
            }

            rs.close();
            stmt.close();
            conn.close();

        }
        catch(Exception ex)
        {
            ex.printStackTrace();
        }

        return dataMap;
    }