Source code for airflow.providers.apache.livy.sensors.livy

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"""This module contains the Apache Livy sensor."""

from __future__ import annotations

from typing import TYPE_CHECKING, Any, Sequence

from airflow.providers.apache.livy.hooks.livy import LivyHook
from airflow.sensors.base import BaseSensorOperator

if TYPE_CHECKING:
    from airflow.utils.context import Context


[docs]class LivySensor(BaseSensorOperator): """ Monitor a Livy sessions for termination. :param livy_conn_id: reference to a pre-defined Livy connection :param batch_id: identifier of the monitored batch depends on the option that's being modified. """
[docs] template_fields: Sequence[str] = ("batch_id",)
def __init__( self, *, batch_id: int | str, livy_conn_id: str = "livy_default", livy_conn_auth_type: Any | None = None, extra_options: dict[str, Any] | None = None, **kwargs: Any, ) -> None: super().__init__(**kwargs) self.batch_id = batch_id self._livy_conn_id = livy_conn_id self._livy_conn_auth_type = livy_conn_auth_type self._livy_hook: LivyHook | None = None self._extra_options = extra_options or {}
[docs] def get_hook(self) -> LivyHook: """ Get valid hook. :return: hook """ if self._livy_hook is None or not isinstance(self._livy_hook, LivyHook): self._livy_hook = LivyHook( livy_conn_id=self._livy_conn_id, extra_options=self._extra_options, auth_type=self._livy_conn_auth_type, ) return self._livy_hook
[docs] def poke(self, context: Context) -> bool: batch_id = self.batch_id status = self.get_hook().get_batch_state(batch_id) return status in self.get_hook().TERMINAL_STATES

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