How to notify the changed status of activity to the business system ?

[coolshun]

How to notify the changed status of activity to the business system ?

[glime-ai]

To notify a business system about the changed status of an activity or workflow, you can use a combination of webhook events and custom activity execution middleware in Elsa Workflows. Here are the steps you can follow:

1. Webhook Events: Configure webhook events in your workflow to send notifications to the business system's endpoint when certain activities are executed or when the workflow reaches a specific state. You can set up a webhook event to trigger on events like RunTask as shown in the external application integration guide. The business system needs to expose an endpoint to receive these webhook calls.

2. Custom Activity Execution Middleware: Implement custom activity execution middleware that gets executed for each activity. This middleware can publish notifications like ActivityExecuting and ActivityExecuted. You can use this middleware to send custom notifications to your business system whenever an activity's status changes.

3. Event Handling: For Elsa 2, you can handle the ActivityExecuted notification to know when an activity is completed. For Elsa 3, you can implement a similar mechanism by using custom middleware components.

4. Conductor Activities: Use RunTask and EventReceived activities from Elsa.Activities.Conductor to orchestrate tasks and events between the workflow and the business system. The business system can send events to the workflow to start or resume execution by triggering EventReceived activities.

5. Webhook Endpoint: Ensure that your business system has a webhook endpoint that the workflow server can invoke to notify about task execution or other events.

6. Signal Mechanism: Although the Elsa signaling mechanism is designed to send signals to workflows and not directly to business systems, you can use it in conjunction with the above methods to orchestrate complex interactions.

Remember to configure your workflow and business system to handle these notifications appropriately. You may need to implement additional logic in your business system to process the incoming data from the workflow and update the system's state accordingly.