OnsTopicCreate

You can call this operation to create a topic.

Description

This operation is called when new topics are required to publish new applications or implement service logic.

By default, only primary accounts can call this operation. RAM sub-accounts can call this operation only after being authorized.

Name	Type	Required	Description
PreventCache	Long	Yes	The parameter used for CSRF verification, which can be set to the current system time. Unit: ms
InstanceId	String	No	The ID of the instance.
Topic	String	Yes	The name of the topic you want to create. Note: “CID” and “GID” are the reserved fields of a group ID, and they cannot be the start of a topic name. If namespaces are available in the instance for which the topic is created, the topic name must be unique in the instance and can be duplicated across instances. If no namespaces are available in the instance, the topic name must be unique both in the instance and across instances.
MessageType	Integer	Yes	The type of the message. Valid values: 0: normal message 1: partitionally ordered message 2: globally ordered message 4: transactional message 5: scheduled/delayed message
Remark	String	No	The remarks on the request. This parameter can be left blank.

Name	Type	Description
RequestId	String	A common parameter. Each request has a unique ID to facilitate troubleshooting and fault locating.
HelpUrl	String	A help link.

For more information about sample codes, see API sample code and endpoints.