Source code for airflow.providers.databricks.utils.databricks

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from __future__ import annotations

from airflow.exceptions import AirflowException
from airflow.providers.databricks.hooks.databricks import RunState


[docs]def normalise_json_content(content, json_path: str = "json") -> str | bool | list | dict:
    """
    Normalize content or all values of content if it is a dict to a string.

    The function will throw if content contains non-string or non-numeric non-boolean
    types. The reason why we have this function is because the ``self.json`` field
    must be a dict with only string values. This is because ``render_template`` will
    fail for numerical values.

    The only one exception is when we have boolean values, they can not be converted
    to string type because databricks does not understand 'True' or 'False' values.
    """
    normalise = normalise_json_content
    if isinstance(content, (str, bool)):
        return content
    elif isinstance(content, (int, float)):
        # Databricks can tolerate either numeric or string types in the API backend.
        return str(content)
    elif isinstance(content, (list, tuple)):
        return [normalise(e, f"{json_path}[{i}]") for i, e in enumerate(content)]
    elif isinstance(content, dict):
        return {k: normalise(v, f"{json_path}[{k}]") for k, v in content.items()}
    else:
        param_type = type(content)
        msg = f"Type {param_type} used for parameter {json_path} is not a number or a string"
        raise AirflowException(msg)


[docs]def validate_trigger_event(event: dict):
    """
    Validate correctness of the event received from DatabricksExecutionTrigger.

    See: :class:`~airflow.providers.databricks.triggers.databricks.DatabricksExecutionTrigger`.
    """
    keys_to_check = ["run_id", "run_page_url", "run_state", "errors"]
    for key in keys_to_check:
        if key not in event:
            raise AirflowException(f"Could not find `{key}` in the event: {event}")

    try:
        RunState.from_json(event["run_state"])
    except Exception:
        raise AirflowException(f'Run state returned by the Trigger is incorrect: {event["run_state"]}')