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Help Center> IoT> API Reference> Northbound Java SDK API Reference> Service API List> Batch Processing> Querying Information About a Subtask of a Batch Task
Updated at: Feb 24, 2022 GMT+08:00

Querying Information About a Subtask of a Batch Task

Typical Scenario

After creating a batch task for devices, an NA can call this API to query information about a subtask of the batch task, including the subtask execution status and subtask content.

API Function

This API is used by an NA to query information about a subtask of a batch task based on specified conditions. This API applies to the current application.

API Description

1
QueryTaskDetailsOutDTO queryTaskDetails(QueryTaskDetailsInDTO qtdInDTO, String accessToken) throws NorthApiException

Class

BatchProcess

Parameter Description

Parameter

Mandatory or Optional

Type

Location

Description

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.

qtdInDTO

Mandatory

QueryTaskDetailsInDTO

query

For details, see QueryTaskDetailsInDTO structure.

QueryTaskDetailsInDTO structure

Parameter

Mandatory or Optional

Type

Location

Description

appId

Optional

String

query

Uniquely identifies an NA. This parameter is used to identify an NA that can call open APIs provided by the IoT platform. The value of this parameter is obtained when the NA is created on the SP portal of the IoT platform. Set this parameter to the value of appId of the authorized application.

taskId

Mandatory

String

query

Identifies a batch task.

status

Optional

String

query

Indicates the task status. The value options are Pending, WaitResult, Success, Fail, and Timeout.

deviceId

Optional

String

query

Identifies a device. This parameter is used for querying details about a batch command delivery task.

commandId

Optional

String

query

Identifies a command. This parameter is used for querying details about a batch command delivery task.

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 1.

Return Value

QueryTaskDetailsOutDTO

Parameter

Type

Description

pageNo

Integer

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

Integer

Indicates the page size. The value is an integer greater than or equal to 1. The default value is 1.

totalCount

Integer

Indicates the total number of records.

taskDetails

List<QueryTaskDetailDTOCloud2NA>

Indicates the task details list. For details, see QueryTaskDetailDTOCloud2NA structure.

QueryTaskDetailDTOCloud2NA structure

Parameter

Type

Description

status

String

Indicates the task status. The value options are Pending, WaitResult, Success, Fail, and Timeout.

output

String

Indicates the output of a batch command delivery task.

error

String

Indicates the cause of error, in the format of {\"error_code\": \"****\", \"error_desc\":\"*****\"}.

param

ObjectNode

Indicates the task parameter, which varies depending on the value of taskType.

ObjectNode structure:

Parameter

Type

Description

deviceId

String

Uniquely identifies a device. The value of this parameter is allocated by the IoT platform during device registration..

commandId

String

Uniquely identifies a device command. The value of this parameter is allocated by the IoT platform during command delivery.

Error Codes

HTTP Status Code

Error Code

Error Description

Remarks

400

100022

The input is invalid

An input parameter is invalid.

Recommended handling: Check whether parameters carried in the API call request are valid.

403

100203

The application is not existed.

The application does not exist.

Recommended handling:

  • Check whether appId carried in the HTTP request header is correct.
  • Check whether appId in the request path (URL) is correct.

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.

404

105005

The batchTask is not existed.

The batch task does not exist.

Recommended handling: Check whether taskId carried in the API request is correct.

500

100203

The application is not existed.

The application does not exist.

Recommended handling:

  • Check whether appId carried in the HTTP request header is correct.
  • Check whether appId in the request path (URL) is correct.

500

50252

Internal server error.

An internal server error occurs.

Recommended handling: An internal error occurs on the IoT platform. Contact IoT platform maintenance personnel.

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