Creating a Topic
Scenarios
A topic serves as a message sending channel, where publishers and subscribers can interact with each other.
You can create your own topic.
Creating a Topic
- Log in to the management console.
- In the upper left corner, select a region and project.
- In the service list, select Simple Message Notification.
The SMN console is displayed.
- In the navigation pane on the left, choose Topic Management > Topics.
The Topics page is displayed.
- Click Create Topic.
The Create Topic dialog box is displayed.
Figure 1 Creating a topic - Enter a topic name and display name (topic description).
Table 1 Parameters required for creating a topic Parameter
Description
Topic Name
Specifies the topic name, which
- Contains only letters, digits, hyphens (-), and underscores (_) and must start with a letter or a digit.
- Must contain 1 to 255 characters.
- Must be unique and cannot be modified after the topic is created.
Display Name
Specifies the message sender name, which must be 192 characters or less.
NOTE:After you specify a display name, the sender will be presented in Display name<username@example.com> format, or the sender will be <username@example.com>.
Tag
Tags identify cloud resources so that you can categorize and search for your resources easily and quickly.
- For each resource, each tag key must be unique, and can have only one tag value.
- A tag key can contain a maximum of 36 characters. It can only include digits, letters, underscores (_), and hyphens (-).
- A tag value can contain a maximum of 43 characters, including digits, letters, underscores (_), periods (.), and hyphens (-).
- A maximum of 10 tags can be added to a topic.
- Click OK.
The topic you created is displayed in the topic list.
After you create a topic, the system generates a uniform resource name (URN) for the topic, which uniquely identifies the topic and cannot be changed.
- Click the name of the topic you created to view the topic its details.
Follow-up Operations
After you create a topic, add subscriptions to the topic by referring to add subscriptions. After the subscriptions have been confirmed, alarm notifications will be sent to the subscription endpoints via SMN.
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