cherrera20 commented on issue #39463: URL: https://github.com/apache/airflow/issues/39463#issuecomment-2099995962
Hi there! Thanks for your response. The idea behind the **ExternalAPITaskSensor** is to address specific needs that go beyond what the **HttpSensor** can offer. While the **HttpSensor** provides a basic mechanism to poll an API endpoint, it doesn't really grasp the concept of external tasks and DAGs in the Airflow world. The **ExternalAPITaskSensor** would retain the context of external tasks and DAGs, providing a seamless way to monitor specific DAG runs or tasks in another Airflow instance via the API. It would leverage attributes like **external_dag_id**, **execution_date**, **allowed_states**, **skipped_states**, and **failed_states**, which are unique to external DAGs and tasks. Here's why I think this sensor is necessary: - **State Awareness and Exception Management**: It would handle different states (like success, skipped, and failed) and raise exceptions (e.g., **AirflowFailException**, **AirflowSkipException**) when a specific state is reached. This ensures that task dependencies are managed correctly. - **Advanced Error Handling**: It would differentiate between transient network errors (retries with a threshold) and API-related issues, providing more robust error handling. - **Deferrable** Execution: The sensor would be able to defer execution to a custom WorkflowTrigger. In summary, while the **HttpSensor** is great for basic API polling, it lacks the features needed to monitor external tasks and DAGs properly. The **ExternalAPITaskSensor** would encapsulate this logic, making it a valuable tool for workflows that rely on task dependencies across multiple DAGs or external Airflow instances. I hope this explanation makes the purpose clear. Let me know if you have any questions or suggestions! -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
