public void addTestMeasurement(String feedID, String timestamp, double value) {
		
		try {
			// build prepared statement
			String INSERT_RECORD = "INSERT INTO observations(feedid, date, value) VALUES (?,?,?)";
			PreparedStatement pstmt = con.prepareStatement(INSERT_RECORD);
			pstmt.setString(1, feedID);
			
			Date date = utils.overlongTimestampToDate(timestamp);

			java.sql.Timestamp sqlDate = new java.sql.Timestamp(date.getTime());
			pstmt.setTimestamp(2, sqlDate);
			
			pstmt.setDouble(3, value);
			
			pstmt.executeUpdate();
			

		} catch (SQLException e) {
			logger.warn("Invalid query");
			e.printStackTrace();
		} catch (ParseException e) {
			logger.warn("Problems while parsing timestamp");
			e.printStackTrace();
		}
	}