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#
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#
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from __future__ import annotations
import asyncio
from functools import cached_property
from typing import Any, AsyncIterator
from airflow.providers.amazon.aws.hooks.glue import GlueJobHook
from airflow.providers.amazon.aws.hooks.glue_catalog import GlueCatalogHook
from airflow.triggers.base import BaseTrigger, TriggerEvent
[docs]class GlueJobCompleteTrigger(BaseTrigger):
"""
Watches for a glue job, triggers when it finishes.
:param job_name: glue job name
:param run_id: the ID of the specific run to watch for that job
:param verbose: whether to print the job's logs in airflow logs or not
:param aws_conn_id: The Airflow connection used for AWS credentials.
"""
def __init__(
self,
job_name: str,
run_id: str,
verbose: bool,
aws_conn_id: str | None,
job_poll_interval: int | float,
):
super().__init__()
self.job_name = job_name
self.run_id = run_id
self.verbose = verbose
self.aws_conn_id = aws_conn_id
self.job_poll_interval = job_poll_interval
[docs] def serialize(self) -> tuple[str, dict[str, Any]]:
return (
# dynamically generate the fully qualified name of the class
self.__class__.__module__ + "." + self.__class__.__qualname__,
{
"job_name": self.job_name,
"run_id": self.run_id,
"verbose": str(self.verbose),
"aws_conn_id": self.aws_conn_id,
"job_poll_interval": self.job_poll_interval,
},
)
[docs] async def run(self) -> AsyncIterator[TriggerEvent]:
hook = GlueJobHook(aws_conn_id=self.aws_conn_id, job_poll_interval=self.job_poll_interval)
await hook.async_job_completion(self.job_name, self.run_id, self.verbose)
yield TriggerEvent({"status": "success", "message": "Job done", "value": self.run_id})
[docs]class GlueCatalogPartitionTrigger(BaseTrigger):
"""
Asynchronously waits for a partition to show up in AWS Glue Catalog.
:param database_name: The name of the catalog database where the partitions reside.
:param table_name: The name of the table to wait for, supports the dot
notation (my_database.my_table)
:param expression: The partition clause to wait for. This is passed as
is to the AWS Glue Catalog API's get_partitions function,
and supports SQL like notation as in ``ds='2015-01-01'
AND type='value'`` and comparison operators as in ``"ds>=2015-01-01"``.
See https://docs.aws.amazon.com/glue/latest/dg/aws-glue-api-catalog-partitions.html
#aws-glue-api-catalog-partitions-GetPartitions
:param aws_conn_id: ID of the Airflow connection where
credentials and extra configuration are stored
:param region_name: Optional aws region name (example: us-east-1). Uses region from connection
if not specified.
:param waiter_delay: Number of seconds to wait between two checks. Default is 60 seconds.
"""
def __init__(
self,
database_name: str,
table_name: str,
expression: str = "",
aws_conn_id: str | None = "aws_default",
region_name: str | None = None,
waiter_delay: int = 60,
):
self.database_name = database_name
self.table_name = table_name
self.expression = expression
self.aws_conn_id = aws_conn_id
self.region_name = region_name
self.waiter_delay = waiter_delay
[docs] def serialize(self) -> tuple[str, dict[str, Any]]:
return (
# dynamically generate the fully qualified name of the class
self.__class__.__module__ + "." + self.__class__.__qualname__,
{
"database_name": self.database_name,
"table_name": self.table_name,
"expression": self.expression,
"aws_conn_id": self.aws_conn_id,
"region_name": self.region_name,
"waiter_delay": self.waiter_delay,
},
)
@cached_property
[docs] def hook(self) -> GlueCatalogHook:
return GlueCatalogHook(aws_conn_id=self.aws_conn_id, region_name=self.region_name)
[docs] async def poke(self, client: Any) -> bool:
if "." in self.table_name:
self.database_name, self.table_name = self.table_name.split(".")
self.log.info(
"Poking for table %s. %s, expression %s", self.database_name, self.table_name, self.expression
)
partitions = await self.hook.async_get_partitions(
client=client,
database_name=self.database_name,
table_name=self.table_name,
expression=self.expression,
)
return bool(partitions)
[docs] async def run(self) -> AsyncIterator[TriggerEvent]:
async with self.hook.async_conn as client:
while True:
result = await self.poke(client=client)
if result:
yield TriggerEvent({"status": "success"})
break
else:
await asyncio.sleep(self.waiter_delay)