Source code for airflow.providers.amazon.aws.triggers.glue

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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)