Query the Data Transfer Stacking Policy

Function

This API is used by an application to query a specified data transfer and stacking policy on the IoT platform.

Debugging

You can debug this API through automatic authentication in API Explorer or use the SDK sample code generated by API Explorer.

URI

GET /v5/iot/{project_id}/routing-rule/backlog-policy/{policy_id}

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Parameter description: project ID. For details about how to obtain the project ID, see Obtaining a Project ID.
policy_id	Yes	String	Parameter description: ID of the data stacking policy. The value of this parameter is unique and is allocated by the platform during data stacking policy creation.

Request Parameters

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	No	String	Parameter description: user token. You can obtain the token by calling the IAM API Obtaining a User Token Through Password Authentication. In the returned response header, X-Subject-Token is the desired user token. For details about how to obtain the token, see Token Authentication.
Instance-Id	No	String	Parameter description: Instance ID. This parameter is required only when the API is called from the management plane in the physical multi-tenant scenario. You can log in to the IoTDA console and choose Overview in the navigation pane to view the instance ID.

Response Parameters

Status code: 200

**Table 3** Response body parameters
Parameter	Type	Description
policy_id	String	Parameter description: ID of the data stacking policy. The value of this parameter is unique and is allocated by the platform during data stacking policy creation.
policy_name	String	Parameter description: Name of a data transfer stacking policy. Value: The value can contain a maximum of 256 characters. Only letters, digits, and special characters (_?'#().,&%@!-) are allowed.
description	String	Parameter description: Description of a custom data transfer stacking policy. Value: The value can contain a maximum of 256 characters. Only letters, digits, and special characters (_?'#().,&%@!-) are allowed.
backlog_size	Integer	Parameter description: Size of stacked data. The value is an integer ranging from 0 to 1073741823, in bytes. The default value is 1073741823 (1 GB). If the value of backlog_size is 0, logs are not stacked. If both backlog_size and backlog_time are configured, the dimension that first reaches the threshold is used.
backlog_time	Integer	Parameter description: Data backlog time. The value is an integer ranging from 0 to 86399, in seconds. The default value is 86399 (one day). If the value of backlog_time is 0, messages are not stacked. If both backlog_size and backlog_time are configured, the dimension that first reaches the threshold is used.

Example Requests

Queries a specified stack policy.

GET https://{endpoint}/v5/iot/{project_id}/routing-rule/backlog-policy/{policy_id}

Example Responses

Status code: 200

{
  "policy_id" : "adadd5cb-6383-4b5b-a65c-f8c92fdf3c34",
  "policy_name" : "policyName",
  "description" : "description",
  "backlog_size" : 1073741823,
  "backlog_time" : 86399
}