@Marvin in a python script how can I send an HTTP request to Prefect server’s API to set the state of a flow run?

To set the state of a flow run via an HTTP request to the Prefect server's API, you would typically interact with the API endpoints that manage flow run states. However, the specific endpoint details were not found in the initial search. Here's a general approach using Python's

requests

library, assuming you have the necessary API endpoint and authentication details:

python
import requests

# Replace with your Prefect server URL and API endpoint
prefect_server_url = "<http://your-prefect-server/api>"
flow_run_id = "your-flow-run-id"  # Replace with your actual flow run ID
new_state = "Completed"  # The state you want to set

# Endpoint to set the flow run state
url = f"{prefect_server_url}/flow_runs/{flow_run_id}/set_state"

# Replace with your actual API key if needed
headers = {
    "Authorization": "Bearer YOUR_API_KEY",
    "Content-Type": "application/json"
}

# Payload with the new state
payload = {
    "state": new_state
}

response = <http://requests.post|requests.post>(url, headers=headers, json=payload)

if response.status_code == 200:
    print("Flow run state updated successfully.")
else:
    print(f"Failed to update flow run state: {response.text}")

Please ensure you replace placeholders like

your-prefect-server

,

your-flow-run-id

, and

YOUR_API_KEY

with actual values. Also, verify the correct endpoint path with your Prefect server's API documentation or setup. For more details, you might want to explore the Prefect API documentation or the source code directly. Here are some useful links: - Prefect Flow Engine Source Code - Prefect Settings and Profiles If you need further assistance or details, I recommend checking the Prefect server's API documentation specific to your version.

@Marvin expand on how to set the payload with the new state so that the run state will be set to Crashed.

To set a flow run's state to "Crashed" via the Prefect server's API, you would need to construct a payload that represents this state. Although the specific API endpoint details for setting a state weren't explicitly found, you can generally follow this structure based on typical API design patterns and the Prefect code excerpts. Here's how you might construct the payload to set the state to "Crashed":

python
import requests

# Replace with your Prefect server URL and API endpoint
prefect_server_url = "<http://your-prefect-server/api>"
flow_run_id = "your-flow-run-id"  # Replace with your actual flow run ID

# Endpoint to set the flow run state
url = f"{prefect_server_url}/flow_runs/{flow_run_id}/set_state"

# Replace with your actual API key if needed
headers = {
    "Authorization": "Bearer YOUR_API_KEY",
    "Content-Type": "application/json"
}

# Payload with the new state
payload = {
    "state": {
        "type": "Crashed",
        "message": "The flow run has crashed due to an unexpected error.",
        "data": {}  # Additional data can be included if needed
    }
}

response = <http://requests.post|requests.post>(url, headers=headers, json=payload)

if response.status_code == 200:
    print("Flow run state updated to Crashed successfully.")
else:
    print(f"Failed to update flow run state: {response.text}")

In this example, the

state

field is a dictionary containing the

type

set to "Crashed", a

message

explaining the reason, and an optional

data

field for additional context. Adjust this structure based on the actual API documentation or Prefect server version you are using. If you have access to your Prefect server's API documentation, it will provide the exact requirements for the payload structure. For further customization, you might want to explore the Prefect Flow Engine Source Code for insights into state handling.