Creating a Topic
Function
This API is used to create a topic. Each user can create up to 3,000 topics. In high-concurrent scenarios, a user may create a few topics more than 3,000.
The API is idempotent. It returns a successful result after creating a topic. If a topic of the same name already exists, the status code is 200. Otherwise, the status code is 201.
Calling Method
For details, see Calling APIs.
URI
POST /v2/{project_id}/notifications/topics
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
project_id |
Yes |
String |
Specifies the project ID.For details about how to obtain the project ID, see Obtaining the Project ID. |
Request Parameters
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
X-Auth-Token |
Yes |
String |
Specifies a user token. It can be obtained by calling an IAM API. The value of X-Subject-Token in the response header is the user token. |
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
name |
Yes |
String |
Specifies the topic name. Enter 1 to 255 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed. The topic name must start with a letter or digit. |
display_name |
Yes |
String |
Specifies the topic display name, which is presented as the name of the email sender in email messages. The display name cannot exceed 192 bytes. display_name is left blank by default. |
enterprise_project_id |
No |
String |
Specifies the enterprise project ID. It is required only when the enterprise project function is enabled. |
Response Parameters
Status code: 201
Parameter |
Type |
Description |
---|---|---|
request_id |
String |
Specifies the request ID, which is unique. |
topic_urn |
String |
Specifies the resource identifier of the topic, which is unique. To obtain the resource identifier, see [Querying Topics]. |
Status code: 400
Parameter |
Type |
Description |
---|---|---|
request_id |
String |
Specifies the request ID, which is unique. |
code |
String |
Specifies the error code. |
message |
String |
Describes the error message. |
Status code: 403
Parameter |
Type |
Description |
---|---|---|
request_id |
String |
Specifies the request ID, which is unique. |
code |
String |
Specifies the error code. |
message |
String |
Describes the error message. |
Status code: 404
Parameter |
Type |
Description |
---|---|---|
request_id |
String |
Specifies the request ID, which is unique. |
code |
String |
Specifies the error code. |
message |
String |
Describes the error message. |
Status code: 500
Parameter |
Type |
Description |
---|---|---|
request_id |
String |
Specifies the request ID, which is unique. |
code |
String |
Specifies the error code. |
message |
String |
Describes the error message. |
Example Requests
Creating a topic with the name of test_topic_v2 and display name of testtest
POST https://{SMN_Endpoint}/v2/{project_id}/notifications/topics { "name" : "test_topic_v2", "display_name" : "testtest" }
Example Responses
Status code: 201
OK
{ "request_id" : "6a63a18b8bab40ffb71ebd9cb80d0085", "topic_urn" : "urn:smn:regionId:f96188c7ccaf4ffba0c9aa149ab2bd57:test_topic_v2" }
SDK Sample Code
The SDK sample code is as follows.
Java
Creating a topic with the name of test_topic_v2 and display name of testtest
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 |
package com.huaweicloud.sdk.test; import com.huaweicloud.sdk.core.auth.ICredential; import com.huaweicloud.sdk.core.auth.BasicCredentials; import com.huaweicloud.sdk.core.exception.ConnectionException; import com.huaweicloud.sdk.core.exception.RequestTimeoutException; import com.huaweicloud.sdk.core.exception.ServiceResponseException; import com.huaweicloud.sdk.smn.v2.region.SmnRegion; import com.huaweicloud.sdk.smn.v2.*; import com.huaweicloud.sdk.smn.v2.model.*; public class CreateTopicSolution { public static void main(String[] args) { // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment String ak = System.getenv("CLOUD_SDK_AK"); String sk = System.getenv("CLOUD_SDK_SK"); String projectId = "{project_id}"; ICredential auth = new BasicCredentials() .withProjectId(projectId) .withAk(ak) .withSk(sk); SmnClient client = SmnClient.newBuilder() .withCredential(auth) .withRegion(SmnRegion.valueOf("<YOUR REGION>")) .build(); CreateTopicRequest request = new CreateTopicRequest(); CreateTopicRequestBody body = new CreateTopicRequestBody(); body.withDisplayName("testtest"); body.withName("test_topic_v2"); request.withBody(body); try { CreateTopicResponse response = client.createTopic(request); System.out.println(response.toString()); } catch (ConnectionException e) { e.printStackTrace(); } catch (RequestTimeoutException e) { e.printStackTrace(); } catch (ServiceResponseException e) { e.printStackTrace(); System.out.println(e.getHttpStatusCode()); System.out.println(e.getRequestId()); System.out.println(e.getErrorCode()); System.out.println(e.getErrorMsg()); } } } |
Python
Creating a topic with the name of test_topic_v2 and display name of testtest
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 |
# coding: utf-8 import os from huaweicloudsdkcore.auth.credentials import BasicCredentials from huaweicloudsdksmn.v2.region.smn_region import SmnRegion from huaweicloudsdkcore.exceptions import exceptions from huaweicloudsdksmn.v2 import * if __name__ == "__main__": # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment ak = os.environ["CLOUD_SDK_AK"] sk = os.environ["CLOUD_SDK_SK"] projectId = "{project_id}" credentials = BasicCredentials(ak, sk, projectId) client = SmnClient.new_builder() \ .with_credentials(credentials) \ .with_region(SmnRegion.value_of("<YOUR REGION>")) \ .build() try: request = CreateTopicRequest() request.body = CreateTopicRequestBody( display_name="testtest", name="test_topic_v2" ) response = client.create_topic(request) print(response) except exceptions.ClientRequestException as e: print(e.status_code) print(e.request_id) print(e.error_code) print(e.error_msg) |
Go
Creating a topic with the name of test_topic_v2 and display name of testtest
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 |
package main import ( "fmt" "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic" smn "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/smn/v2" "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/smn/v2/model" region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/smn/v2/region" ) func main() { // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment ak := os.Getenv("CLOUD_SDK_AK") sk := os.Getenv("CLOUD_SDK_SK") projectId := "{project_id}" auth := basic.NewCredentialsBuilder(). WithAk(ak). WithSk(sk). WithProjectId(projectId). Build() client := smn.NewSmnClient( smn.SmnClientBuilder(). WithRegion(region.ValueOf("<YOUR REGION>")). WithCredential(auth). Build()) request := &model.CreateTopicRequest{} request.Body = &model.CreateTopicRequestBody{ DisplayName: "testtest", Name: "test_topic_v2", } response, err := client.CreateTopic(request) if err == nil { fmt.Printf("%+v\n", response) } else { fmt.Println(err) } } |
More
For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.
Status Codes
Status Code |
Description |
---|---|
201 |
OK |
400 |
Bad Request |
403 |
Unauthorized |
404 |
Not Found |
500 |
Internal Server Error |
Error Codes
See Error Codes.
Feedback
Was this page helpful?
Provide feedbackThank you very much for your feedback. We will continue working to improve the documentation.See the reply and handling status in My Cloud VOC.
For any further questions, feel free to contact us through the chatbot.
Chatbot