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"""Interact with AWS DataSync, using the AWS ``boto3`` library."""
import time
from typing import List, Optional
from airflow.exceptions import AirflowBadRequest, AirflowException, AirflowTaskTimeout
from airflow.providers.amazon.aws.hooks.base_aws import AwsBaseHook
[docs]class AWSDataSyncHook(AwsBaseHook):
"""
Interact with AWS DataSync.
Additional arguments (such as ``aws_conn_id``) may be specified and
are passed down to the underlying AwsBaseHook.
.. seealso::
:class:`~airflow.providers.amazon.aws.hooks.base_aws.AwsBaseHook`
:class:`~airflow.providers.amazon.aws.operators.datasync.AWSDataSyncOperator`
:param int wait_for_task_execution: Time to wait between two
consecutive calls to check TaskExecution status.
:raises ValueError: If wait_interval_seconds is not between 0 and 15*60 seconds.
"""
)
[docs] TASK_EXECUTION_FAILURE_STATES = ("ERROR",)
[docs] TASK_EXECUTION_SUCCESS_STATES = ("SUCCESS",)
def __init__(self, wait_interval_seconds: int = 5, *args, **kwargs) -> None:
super().__init__(client_type='datasync', *args, **kwargs) # type: ignore[misc]
self.locations: list = []
self.tasks: list = []
# wait_interval_seconds = 0 is used during unit tests
if wait_interval_seconds < 0 or wait_interval_seconds > 15 * 60:
raise ValueError("Invalid wait_interval_seconds %s" % wait_interval_seconds)
self.wait_interval_seconds = wait_interval_seconds
[docs] def create_location(self, location_uri: str, **create_location_kwargs) -> str:
r"""Creates a new location.
:param str location_uri: Location URI used to determine the location type (S3, SMB, NFS, EFS).
:param create_location_kwargs: Passed to ``boto.create_location_xyz()``.
See AWS boto3 datasync documentation.
:return str: LocationArn of the created Location.
:raises AirflowException: If location type (prefix from ``location_uri``) is invalid.
"""
typ = location_uri.split(":")[0]
if typ == "smb":
location = self.get_conn().create_location_smb(**create_location_kwargs)
elif typ == "s3":
location = self.get_conn().create_location_s3(**create_location_kwargs)
elif typ == "nfs":
location = self.get_conn().create_loction_nfs(**create_location_kwargs)
elif typ == "efs":
location = self.get_conn().create_loction_efs(**create_location_kwargs)
else:
raise AirflowException(f"Invalid location type: {typ}")
self._refresh_locations()
return location["LocationArn"]
[docs] def get_location_arns(
self, location_uri: str, case_sensitive: bool = False, ignore_trailing_slash: bool = True
) -> List[str]:
"""
Return all LocationArns which match a LocationUri.
:param str location_uri: Location URI to search for, eg ``s3://mybucket/mypath``
:param bool case_sensitive: Do a case sensitive search for location URI.
:param bool ignore_trailing_slash: Ignore / at the end of URI when matching.
:return: List of LocationArns.
:rtype: list(str)
:raises AirflowBadRequest: if ``location_uri`` is empty
"""
if not location_uri:
raise AirflowBadRequest("location_uri not specified")
if not self.locations:
self._refresh_locations()
result = []
if not case_sensitive:
location_uri = location_uri.lower()
if ignore_trailing_slash and location_uri.endswith("/"):
location_uri = location_uri[:-1]
for location_from_aws in self.locations:
location_uri_from_aws = location_from_aws["LocationUri"]
if not case_sensitive:
location_uri_from_aws = location_uri_from_aws.lower()
if ignore_trailing_slash and location_uri_from_aws.endswith("/"):
location_uri_from_aws = location_uri_from_aws[:-1]
if location_uri == location_uri_from_aws:
result.append(location_from_aws["LocationArn"])
return result
[docs] def _refresh_locations(self) -> None:
"""Refresh the local list of Locations."""
self.locations = []
next_token = None
while True:
if next_token:
locations = self.get_conn().list_locations(NextToken=next_token)
else:
locations = self.get_conn().list_locations()
self.locations.extend(locations["Locations"])
if "NextToken" not in locations:
break
next_token = locations["NextToken"]
[docs] def create_task(
self, source_location_arn: str, destination_location_arn: str, **create_task_kwargs
) -> str:
r"""Create a Task between the specified source and destination LocationArns.
:param str source_location_arn: Source LocationArn. Must exist already.
:param str destination_location_arn: Destination LocationArn. Must exist already.
:param create_task_kwargs: Passed to ``boto.create_task()``. See AWS boto3 datasync documentation.
:return: TaskArn of the created Task
:rtype: str
"""
task = self.get_conn().create_task(
SourceLocationArn=source_location_arn,
DestinationLocationArn=destination_location_arn,
**create_task_kwargs,
)
self._refresh_tasks()
return task["TaskArn"]
[docs] def update_task(self, task_arn: str, **update_task_kwargs) -> None:
r"""Update a Task.
:param str task_arn: The TaskArn to update.
:param update_task_kwargs: Passed to ``boto.update_task()``, See AWS boto3 datasync documentation.
"""
self.get_conn().update_task(TaskArn=task_arn, **update_task_kwargs)
[docs] def delete_task(self, task_arn: str) -> None:
r"""Delete a Task.
:param str task_arn: The TaskArn to delete.
"""
self.get_conn().delete_task(TaskArn=task_arn)
[docs] def _refresh_tasks(self) -> None:
"""Refreshes the local list of Tasks"""
self.tasks = []
next_token = None
while True:
if next_token:
tasks = self.get_conn().list_tasks(NextToken=next_token)
else:
tasks = self.get_conn().list_tasks()
self.tasks.extend(tasks["Tasks"])
if "NextToken" not in tasks:
break
next_token = tasks["NextToken"]
[docs] def get_task_arns_for_location_arns(
self,
source_location_arns: list,
destination_location_arns: list,
) -> list:
"""
Return list of TaskArns for which use any one of the specified
source LocationArns and any one of the specified destination LocationArns.
:param list source_location_arns: List of source LocationArns.
:param list destination_location_arns: List of destination LocationArns.
:return: list
:rtype: list(TaskArns)
:raises AirflowBadRequest: if ``source_location_arns`` or ``destination_location_arns`` are empty.
"""
if not source_location_arns:
raise AirflowBadRequest("source_location_arns not specified")
if not destination_location_arns:
raise AirflowBadRequest("destination_location_arns not specified")
if not self.tasks:
self._refresh_tasks()
result = []
for task in self.tasks:
task_arn = task["TaskArn"]
task_description = self.get_task_description(task_arn)
if task_description["SourceLocationArn"] in source_location_arns:
if task_description["DestinationLocationArn"] in destination_location_arns:
result.append(task_arn)
return result
[docs] def start_task_execution(self, task_arn: str, **kwargs) -> str:
r"""
Start a TaskExecution for the specified task_arn.
Each task can have at most one TaskExecution.
:param str task_arn: TaskArn
:return: TaskExecutionArn
:param kwargs: kwargs sent to ``boto3.start_task_execution()``
:rtype: str
:raises ClientError: If a TaskExecution is already busy running for this ``task_arn``.
:raises AirflowBadRequest: If ``task_arn`` is empty.
"""
if not task_arn:
raise AirflowBadRequest("task_arn not specified")
task_execution = self.get_conn().start_task_execution(TaskArn=task_arn, **kwargs)
return task_execution["TaskExecutionArn"]
[docs] def cancel_task_execution(self, task_execution_arn: str) -> None:
"""
Cancel a TaskExecution for the specified ``task_execution_arn``.
:param str task_execution_arn: TaskExecutionArn.
:raises AirflowBadRequest: If ``task_execution_arn`` is empty.
"""
if not task_execution_arn:
raise AirflowBadRequest("task_execution_arn not specified")
self.get_conn().cancel_task_execution(TaskExecutionArn=task_execution_arn)
[docs] def get_task_description(self, task_arn: str) -> dict:
"""
Get description for the specified ``task_arn``.
:param str task_arn: TaskArn
:return: AWS metadata about a task.
:rtype: dict
:raises AirflowBadRequest: If ``task_arn`` is empty.
"""
if not task_arn:
raise AirflowBadRequest("task_arn not specified")
return self.get_conn().describe_task(TaskArn=task_arn)
[docs] def describe_task_execution(self, task_execution_arn: str) -> dict:
"""
Get description for the specified ``task_execution_arn``.
:param str task_execution_arn: TaskExecutionArn
:return: AWS metadata about a task execution.
:rtype: dict
:raises AirflowBadRequest: If ``task_execution_arn`` is empty.
"""
return self.get_conn().describe_task_execution(TaskExecutionArn=task_execution_arn)
[docs] def get_current_task_execution_arn(self, task_arn: str) -> Optional[str]:
"""
Get current TaskExecutionArn (if one exists) for the specified ``task_arn``.
:param str task_arn: TaskArn
:return: CurrentTaskExecutionArn for this ``task_arn`` or None.
:rtype: str
:raises AirflowBadRequest: if ``task_arn`` is empty.
"""
if not task_arn:
raise AirflowBadRequest("task_arn not specified")
task_description = self.get_task_description(task_arn)
if "CurrentTaskExecutionArn" in task_description:
return task_description["CurrentTaskExecutionArn"]
return None
[docs] def wait_for_task_execution(self, task_execution_arn: str, max_iterations: int = 2 * 180) -> bool:
"""
Wait for Task Execution status to be complete (SUCCESS/ERROR).
The ``task_execution_arn`` must exist, or a boto3 ClientError will be raised.
:param str task_execution_arn: TaskExecutionArn
:param int max_iterations: Maximum number of iterations before timing out.
:return: Result of task execution.
:rtype: bool
:raises AirflowTaskTimeout: If maximum iterations is exceeded.
:raises AirflowBadRequest: If ``task_execution_arn`` is empty.
"""
if not task_execution_arn:
raise AirflowBadRequest("task_execution_arn not specified")
status = None
iterations = max_iterations
while status is None or status in self.TASK_EXECUTION_INTERMEDIATE_STATES:
task_execution = self.get_conn().describe_task_execution(TaskExecutionArn=task_execution_arn)
status = task_execution["Status"]
self.log.info("status=%s", status)
iterations -= 1
if status in self.TASK_EXECUTION_FAILURE_STATES:
break
if status in self.TASK_EXECUTION_SUCCESS_STATES:
break
if iterations <= 0:
break
time.sleep(self.wait_interval_seconds)
if status in self.TASK_EXECUTION_SUCCESS_STATES:
return True
if status in self.TASK_EXECUTION_FAILURE_STATES:
return False
if iterations <= 0:
raise AirflowTaskTimeout("Max iterations exceeded!")
raise AirflowException("Unknown status: %s" % status) # Should never happen