Creates a topic.
Usage notes
You can call this operation when new topics are required to publish new applications or implement service logic.
QPS limit
The queries-per-second (QPS) limit on this operation is 1 per user. Throttling is triggered when the number of calls to this operation per second exceeds the QPS limit. Throttling may affect your business. Therefore, call this operation based on your needs. For more information, see QPS limits.
Authorization information
By default, only Alibaba Cloud accounts can call this operation. RAM users can call this operation only after they are authorized to use it. The following table lists the authorization information of this operation. For more information, see Policies and examples.
API |
Action |
Resource (with namespace) |
Resource (without namespace) |
---|---|---|---|
OnsTopicCreate |
mq:CreateTopic |
acs:mq:*:*:{instanceId}%{topic} |
acs:mq:*:*:{topic} |
Debugging
Request parameters
Parameter | Type | Required | Example | Description |
---|---|---|---|---|
Action | String | Yes | OnsTopicCreate |
The operation that you want to perform. Set the value to OnsTopicCreate. |
InstanceId | String | Yes | MQ_INST_188077086902****_BXSuW61e |
The ID of the instance where you want to create the topic. |
MessageType | Integer | Yes | 0 |
The type of messages in the topic. Valid values:
For more information about each type of message, see Overview. |
Topic | String | Yes | test |
The name of the topic that you want to create.
|
Remark | String | No | Test |
The description of the topic that you want to create. |
Response parameters
Parameter | Type | Example | Description |
---|---|---|---|
RequestId | String | B6949B58-223E-4B75-B4FE-7797C15E**** |
The ID of the request, which is a common parameter. Each request has a unique ID to facilitate troubleshooting and fault locating. |
Examples
Sample requests
http(s)://ons.cn-zhangjiakou.aliyuncs.com/? Action=OnsTopicCreate
&InstanceId=MQ_INST_188077086902****_BXSuW61e
&MessageType=0
&Topic=test
&<Common request parameters>
Sample success responses
XML
format
<OnsTopicCreateResponse>
<RequestId>B6949B58-223E-4B75-B4FE-7797C15E****</RequestId>
</OnsTopicCreateResponse>
JSON
format
{
"RequestId": "B6949B58-223E-4B75-B4FE-7797C15E****"
}
Error codes
For a list of error codes, visit the API Error Center.
Operations in the console
In addition to calling the OnsTopicCreate operation, you can create a topic in the Message Queue for Apache RocketMQ console. For more information, see Manage topics.