Source code for airflow.providers.amazon.aws.sensors.rds

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from typing import TYPE_CHECKING, List, Optional, Sequence

from botocore.exceptions import ClientError

from airflow import AirflowException
from airflow.providers.amazon.aws.hooks.rds import RdsHook
from airflow.providers.amazon.aws.utils.rds import RdsDbType
from airflow.sensors.base import BaseSensorOperator

if TYPE_CHECKING:
    from airflow.utils.context import Context


class RdsBaseSensor(BaseSensorOperator):
    """Base operator that implements common functions for all sensors"""

    ui_color = "#ddbb77"
    ui_fgcolor = "#ffffff"

    def __init__(self, *args, aws_conn_id: str = "aws_conn_id", hook_params: Optional[dict] = None, **kwargs):
        hook_params = hook_params or {}
        self.hook = RdsHook(aws_conn_id=aws_conn_id, **hook_params)
        self.target_statuses: List[str] = []
        super().__init__(*args, **kwargs)

    def _describe_item(self, item_type: str, item_name: str) -> list:

        if item_type == 'instance_snapshot':
            db_snaps = self.hook.conn.describe_db_snapshots(DBSnapshotIdentifier=item_name)
            return db_snaps['DBSnapshots']
        elif item_type == 'cluster_snapshot':
            cl_snaps = self.hook.conn.describe_db_cluster_snapshots(DBClusterSnapshotIdentifier=item_name)
            return cl_snaps['DBClusterSnapshots']
        elif item_type == 'export_task':
            exports = self.hook.conn.describe_export_tasks(ExportTaskIdentifier=item_name)
            return exports['ExportTasks']
        else:
            raise AirflowException(f"Method for {item_type} is not implemented")

    def _check_item(self, item_type: str, item_name: str) -> bool:
        """Get certain item from `_describe_item()` and check its status"""
        try:
            items = self._describe_item(item_type, item_name)
        except ClientError:
            return False
        else:
            return bool(items) and any(map(lambda s: items[0]['Status'].lower() == s, self.target_statuses))


[docs]class RdsSnapshotExistenceSensor(RdsBaseSensor): """ Waits for RDS snapshot with a specific status. .. seealso:: For more information on how to use this sensor, take a look at the guide: :ref:`howto/sensor:RdsSnapshotExistenceSensor` :param db_type: Type of the DB - either "instance" or "cluster" :param db_snapshot_identifier: The identifier for the DB snapshot :param target_statuses: Target status of snapshot """
[docs] template_fields: Sequence[str] = ( 'db_snapshot_identifier', 'target_statuses',
) def __init__( self, *, db_type: str, db_snapshot_identifier: str, target_statuses: Optional[List[str]] = None, aws_conn_id: str = "aws_conn_id", **kwargs, ): super().__init__(aws_conn_id=aws_conn_id, **kwargs) self.db_type = RdsDbType(db_type) self.db_snapshot_identifier = db_snapshot_identifier self.target_statuses = target_statuses or ['available']
[docs] def poke(self, context: 'Context'): self.log.info( 'Poking for statuses : %s\nfor snapshot %s', self.target_statuses, self.db_snapshot_identifier ) if self.db_type.value == "instance": return self._check_item(item_type='instance_snapshot', item_name=self.db_snapshot_identifier) else: return self._check_item(item_type='cluster_snapshot', item_name=self.db_snapshot_identifier)
[docs]class RdsExportTaskExistenceSensor(RdsBaseSensor): """ Waits for RDS export task with a specific status. .. seealso:: For more information on how to use this sensor, take a look at the guide: :ref:`howto/sensor:RdsExportTaskExistenceSensor` :param export_task_identifier: A unique identifier for the snapshot export task. :param target_statuses: Target status of export task """
[docs] template_fields: Sequence[str] = ( 'export_task_identifier', 'target_statuses',
) def __init__( self, *, export_task_identifier: str, target_statuses: Optional[List[str]] = None, aws_conn_id: str = "aws_default", **kwargs, ): super().__init__(aws_conn_id=aws_conn_id, **kwargs) self.export_task_identifier = export_task_identifier self.target_statuses = target_statuses or [ 'starting', 'in_progress', 'complete', 'canceling', 'canceled', ]
[docs] def poke(self, context: 'Context'): self.log.info( 'Poking for statuses : %s\nfor export task %s', self.target_statuses, self.export_task_identifier ) return self._check_item(item_type='export_task', item_name=self.export_task_identifier)
__all__ = [ "RdsExportTaskExistenceSensor", "RdsSnapshotExistenceSensor", ]

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