Calling Service APIs

//After the NorthApiClient instance is obtained, use the NorthApiClient to obtain the authentication instance.
Authentication authentication = new Authentication(northApiClient);

//Call the service API provided by the authentication instance, for example, getAuthToken.
AuthOutDTO authOutDTO = authentication.getAuthToken();

//Obtain the required parameters from the returned authOutDTO, for example, accessToken.
String accessToken = authOutDTO.getAccessToken();

//After the NorthApiClient instance is obtained, use the NorthApiClient to obtain the subscription instance.
SubscriptionManagement subscriptionManagement = new SubscriptionManagement(northApiClient);

//Set the first input parameter SubDeviceDataInDTO in the subDeviceData API.
SubDeviceDataInDTO sddInDTO = new SubDeviceDataInDTO();
sddInDTO.setNotifyType("deviceDataChanged");
//Modify the callback IP address and port number based on site requirements.
ddInDTO.setCallbackUrl("https://XXX.XXX.XXX.XXX:8099/v1.0.0/messageReceiver");
try {
   //Call the service API provided by the subscription class instance subscriptionManagement, for example, subDeviceData.
    SubscriptionDTO subDTO = subscriptionManagement.subDeviceData(sddInDTO, null, accessToken);
    System.out.println(subDTO.toString());
} catch (NorthApiException e) {
    System.out.println(e.toString());
}

//After the NorthApiClient instance is obtained, use the NorthApiClient to obtain the device management instance.
DeviceManagement deviceManagement = new DeviceManagement(northApiClient);

//Set the first input parameter RegDirectDeviceInDTO2 in the regDirectDevice API. 
RegDirectDeviceInDTO2 rddInDTO = new RegDirectDeviceInDTO2();
String nodeid = "86370303XXXXXX"; //this is a test imei
String verifyCode = nodeid;
rddInDTO.setNodeId(nodeid);
rddInDTO.setVerifyCode(verifyCode);
rddInDTO.setTimeout(timeout);

//Call the service API provided by the device management instance deviceManagement, for example, regDirectDevice.
RegDirectDeviceOutDTO rddod = deviceManagement.regDirectDevice(rddInDTO, null, accessToken);

//Obtain the required parameters from the returned rddod structure, for example, deviceId.
String deviceId = rddod.getDeviceId();