Event Listener Triggers

Event Listener is a powerful Catalyst Cloud Scale component that is essentially an event bus service that listens for the occurrences of pre-determined events and automatically executes associated Event functions, or the targeted Circuits.

In Stratus, you can configure the required rule to trigger an Event Listener at the event of an:

• Object Upload
• Object Download
• Object Update
• Object Delete

Create Event Listener Triggers in Buckets

To create a rule for the event listener in Stratus:

1. Click on the required bucket.

   
   

2. Click the Configurations tab.

   
   

3. Expand the Event Listener Trigger section and click Add Rule.

   
   

4. Provide a name and description for the rule.

   
   

5. Select the action or actions that is supposed to trigger the event listener from the Action drop-down.

   
   

6. Choose your required Target Point. Based on this selection, either an Event Function or a Circuit will be triggered when the selected actions occur.

Event Function

7. Choose the required event function from the **Target Function** drop-down.

Note:

• If you still have not coded and deployed the required Event Function, click the Create Event Function button. You will be directed to the Serverless section of the console, and follow the steps listed in this help documentation to create an event function.

• If you have initialized the required function using the Catalyst CLI, ensure you deploy the function to the Catalyst console once you have coded your required business logic.

8. Click Create.
   

The rule will be created, and the event listener trigger will be enabled.

Circuit

7. Choose the required circuit from the Target Circuit drop-down.
   

Note: If you have not yet coded and deployed the required functions for the Circuit and created it, click the Create Circuit button. You will be directed to the Serverless section of the console, and follow the steps listed in this help documentation to create a Circuit.

8. Click Create.
   

The rule will be created, and the event listener trigger will be enabled.

Edit an Event Listener Trigger

To edit an event listener trigger:

1. Click the ellipsis icon next to the rule, then click Edit.

   
   

2. Make the required edits and click Update.

   
   

The changes will be applied.

Disable an Event Listener Trigger

To disable an event listener trigger:

1. Click the ellipsis icon next to the rule, then click Disable.

   
   

2. Click Disable in the prompt to confirm your action.

   
   

The rule will be disabled.

Delete an Event Listener Trigger

To delete an event listener trigger:

1. Click the ellipsis icon next to the rule, then click Delete.

   
   

2. Click Delete in the prompt to confirm your action.

   
   

The rule will be deleted.