This topic describes how to publish messages directly using the Notifications service. You can manually enter the message content or allow a service or app to programmatically define the message content.
Each message is broadcast to all subscriptions in the specified topic . Every message sent out as email contains a link to unsubscribe from the related topic.
Message delivery rate limits per endpoint: 60 messages per minute for HTTP-based protocols. (HTTP-based protocols use URL endpoints that begin with "http:" or "https:".) 10 messages per minute for Email protocol.
- IAM policies: To use Notifications, you must be given the required type of access in a policy written by an administrator, whether you're using the Console or the REST API with an SDK, CLI, or other tool. If you get a response that you don’t have permission or are unauthorized, check with your administrator. You may not have the required type of access in the current compartment . For more information on user authorizations, see Notifications Overview.
- Before you can publish a message, you need a topic with at least one subscription. See Managing Topics and Subscriptions.
Creating Automation with Functions and Events
You can create automation by publishing messages to function subscriptions. For an example of a function subscription, see Scenario A: Automatically Resize VMs.
You can create also automation based on state changes of your topics and subscriptions (Notifications resources) by using event types, rules, and actions. For more information, see Overview of Events.
Using the Console
- Open the navigation menu. Under Solutions and Platform, go to Application Integration and click Notifications.
- On the Topics page, for the topic you want, click the Actions icon (three dots), and then click Publish Message.
In the Publish Message dialog box, fill in the fields:
Title: Enter the title you want to send.Rendering of the title by protocol
Protocol Rendering of the title Subject line of the email message. HTTPS (Custom URL) Not rendered. PagerDuty Title field of the published message. Slack Not rendered.
Message: Enter the content you want to send.Note
Message size limit per request: 64KB.
For troubleshooting information related to published messages, see Message not received.
Using the API
For information about using the API and signing requests, see REST APIs and Security Credentials. For information about SDKs, see Software Development Kits and Command Line Interface.
Use these API operations to publish messages: