Help Center> IoT> API Reference> Northbound Java SDK API Reference> Service API List> Message Push> Pushing Device Shadow Status Change Notifications
Updated at: 2022-02-24 GMT+08:00

Pushing Device Shadow Status Change Notifications

Typical Scenario

After an NA subscribes to device shadow status change notifications (the notification type is deviceDesiredPropertiesModifyStatusChanged) on the IoT platform, the IoT platform sends a notification message to the NA when the device shadow on the IoT platform succeeds or fails to synchronize data to the device.

API Function

This API is used by the IoT platform to push notification messages to an NA that has subscribed to device shadow status change notifications.

Note

1. When subscribing to platform service data, an NA must subscribe to the specified callback address in the API description. The server and port in the callback address are the public IP address and specified port of the NA.

2. An NA receives the content of a push message by inheriting the PushMessageReceiver class and rewriting the callback API.

3. If the callback address is not the address of the NA, the NA must implement the original callback API. For details on the API content, see Message Push in the Huawei IoT Platform Northbound API Reference.

API Description

Callback URL

https://server:port/v1.0.0/messageReceiver

Callback API

void handleDeviceDesiredStatusChanged(NotifyDeviceDesiredStatusChangedDTO body)

Class

PushMessageReceiver

Parameter Description

NotifyDeviceDesiredStatusChangedDTO structure

Parameter

Mandatory or Optional

Type

Location

Description

notifyType

Mandatory

String

body

Indicates the notification type. The value is deviceDesiredPropertiesModifyStatusChanged.

deviceId

Mandatory

String

body

Identifies a device.

serviceId

Mandatory

String

body

Identifies a service.

properties

Mandatory

ObjectNode

body

Indicates data attributes of a device shadow.

status

Mandatory

String

body

Indicates the status. The value options are DELIVERED and FAILED.

Response Parameters

Status Code: 200 OK

Request Example

Method: POST
Request: {callbackUrl}
Header:
Content-Type:application/json
Body:
{
    "notifyType":"deviceDesiredPropertiesModifyStatusChanged",
    "deviceId":"******",
    "serviceId":"Device",
    "properties":{
        "Model Number":1,
        "Serial Number":2,
        "Firmware Version":"v1.1.0"
    },
    "status":"DELIVERED"
}

Response Example

Response:
Status Code: 200 OK
close