++ CONTROLLER

   @RequestMapping(value = "/updatePortName", method = RequestMethod.POST)
    public
    @ResponseBody
    SwitchLayoutEditor setPortName(@RequestParam(value = "siteNumber", required = true) String siteNumber, @RequestParam(value = "switchNumber", required = true) String switchNumber, @RequestParam(value = "portNumber", required = true) String portNumber, @RequestParam(value = "portName", required = true) String portName) throws JsonProcessingException {
        return switchLayoutService.updatePortName(webParams, Integer.parseInt(siteNumber), Integer.parseInt(switchNumber), Integer.parseInt(portNumber), portName);
    }

++ SERVICE

    public SwitchLayoutEditor updatePortName(WebParams webParams, int siteNumber, int switchNumber, int portNumber, String portNameToSet) throws JsonProcessingException {
        SwitchPort switchPort = webParams.getPcrSystem().getSites().stream().filter(p -> siteNumber == p.getNumber()).findFirst().get().getSwitch(siteNumber).getPortByNumber(portNumber);
        switchPort.setPortName(portNameToSet);

        return new SwitchLayoutEditor();
    }