Help Center> ROMA Connect> API Reference> Device Integration APIs> Subscription Management Operations> Querying Information About a Subscription Management Task
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Querying Information About a Subscription Management Task

Function

This API is used to query subscription management information of the specified application.

URI

GET /v2/{project_id}/link/instances/{instance_id}/notifications

Table 1 Path parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID. For details about how to obtain the project ID, see Appendix > Obtaining a Project ID in the ROMA Connect API Reference.

Minimum: 0

Maximum: 32

instance_id

Yes

String

Instance ID.

Minimum: 0

Maximum: 36
Table 2 Query parameters

Parameter

Mandatory

Type

Description

app_id

No

String

Application ID.

Minimum: 0

Maximum: 64

Request Parameters

None

Response Parameters

Status code: 200

Table 3 Response body parameters

Parameter

Type

Description

total

Integer

Total.

Minimum: 1

Maximum: 9999999999

size

Integer

Number of records displayed on each page.

Minimum: 1

Maximum: 999

items

Array of NotificationResponseBody objects

List of subscription management tasks.
Table 4 NotificationResponseBody

Parameter

Type

Description

notification_id

Integer

Subscription ID.

Minimum: 0

Maximum: 100

type

Integer

Subscription type. The options include 0 (device online), 1 (device offline), 2 (device addition), 3 (device deletion), and 4 (device change).

Minimum: 0

Maximum: 4

status

Integer

Subscription management status. The options include 0 (enabled) and 1 (disabled).

Minimum: 0

Maximum: 1

topic

String

Name of the subscribed topic.

Minimum: 3

Maximum: 200

instance_id

String

Instance ID.

Minimum: 0

Maximum: 20

app_id

String

Application ID.

Minimum: 0

Maximum: 64

Status code: 400

Table 5 Response body parameters

Parameter

Type

Description

error_code

String

System error code, which is the detailed error code of HTTP error codes 4xx and 5xx.

Minimum: 0

Maximum: 64

error_msg

String

Error description.

Minimum: 0

Maximum: 200

request_id

String

Message ID.

Minimum: 0

Maximum: 64

Status code: 404

Table 6 Response body parameters

Parameter

Type

Description

error_code

String

System error code, which is the detailed error code of HTTP error codes 4xx and 5xx.

Minimum: 0

Maximum: 64

error_msg

String

Error description.

Minimum: 0

Maximum: 200

request_id

String

Message ID.

Minimum: 0

Maximum: 64

Status code: 500

Table 7 Response body parameters

Parameter

Type

Description

error_code

String

System error code, which is the detailed error code of HTTP error codes 4xx and 5xx.

Minimum: 0

Maximum: 64

error_msg

String

Error description.

Minimum: 0

Maximum: 200

request_id

String

Message ID.

Minimum: 0

Maximum: 64

Example Requests

None

Example Responses

Status code: 404

Not Found

{
  "error_code" : "ROMA.00110006",
  "error_msg" : "The resource does not exist. Check whether the resource ID 1 is correct.",
  "requestId" : "624c8be1-39b6-47b7-941d-c159aced368a-1619602544650-cnnorth7a-P-romalink-service01"
}

Status Codes

Status Code

Description

200

OK

400

Bad Request

404

Not Found

500

Internal Server Error

Error Codes

See Error Codes.