Querying Subscription in Batches

Typical Scenario

An NA can subscribe to different types of device change notifications on the IoT platform. The NA can call this API to query all subscription configurations of the current application or of a specified subscription type.

API Function

This API is used to query all subscription information of the current application or of a specified subscription type.

API Description

1	QueryBatchSubOutDTO queryBatchSubscriptions(QueryBatchSubInDTO qbsInDTO, String accessToken) throws NorthApiException

Parameter Description

Parameter	Mandatory or Optional	Type	Location	Description
qbsInDTO	Mandatory	QueryBatchSubInDTO structure	query	For details, see QueryBatchSubInDTO structure.
accessToken	Mandatory	String	header	If the Periodically Refreshing a Token API is called, set this parameter to null. Otherwise, set this parameter to the accessToken obtained by the Authentication API.

QueryBatchSubInDTO structure

Parameter	Mandatory or Optional	Type	Location	Description
appId	Optional	String(256)	query	Identifies the application of the entity that subscribes to a device or rule.
notifyType	Optional	String(256)	query	Indicates the notification type based on which an NA can process messages. bindDevice: device binding deviceAdded: device addition deviceInfoChanged: device information change deviceDataChanged: device data change deviceDatasChanged: batch device data change deviceDeleted: device deletion messageConfirm: message confirmation commandRsp: command response deviceEvent: device event serviceInfoChanged: service information change deviceModelAdded: device model addition deviceModelDeleted: device model deletion deviceDesiredPropertiesModifyStatusChanged: device shadow modification status change swUpgradeStateChangeNotify: software upgrade status change notification swUpgradeResultNotify: software upgrade result notification fwUpgradeStateChangeNotify: firmware upgrade status change notification fwUpgradeResultNotify: firmware upgrade result notification
pageNo	Optional	Integer	query	Indicates the page number. If the value is null, pagination query is not performed. If the value is an integer greater than or equal to 0, pagination query is performed. If the value is 0, the first page is queried.
pageSize	Optional	Integer	query	Indicates the page size. The value is an integer greater than or equal to 1. The default value is 10.

Response Parameters

QueryBatchSubOutDTO

Parameter	Type	Description
totalCount	long	Indicates the total number of records.
pageNo	long	Indicates the page number.
pageSize	long	Indicates the number of records on each page.
subscriptions	List<SubscriptionDTO>	Indicates the subscription information list. For details, see SubscriptionDTO structure.

SubscriptionDTO structure

Parameter	Type	Description
subscriptionId	String	Identifies a subscription.
notifyType	String	Indicates the notification type.
callbackUrl	String	Indicates the callback URL of the subscription.

Error Codes

HTTP Status Code	Error Code	Error Description	Remarks
400	100224	The resource exceeds 1000, please refinement query conditions.	The number of resources exceeds 1000. Recommended handling: Narrow down the filter criteria.
403	100217	The application hasn't been authorized.	The application has not been authorized. Recommended handling: In scenarios where applications are not authorized, ensure that request parameter appId is null.
403	1010009	app throttle exceed.	The NA calls the API at a frequency that exceeds the flow control threshold (100 calls per minute by default). Recommended handling: Contact IoT platform maintenance personnel to adjust the flow control threshold or control the API call frequency.
403	1010005	App_key or access_token is invalid.	The access token is invalid. Recommended handling: Check whether accessToken carried in the API request is correct.