airflow wasb 源码

airflow wasb 代码

文件路径：/airflow/providers/microsoft/azure/sensors/wasb.py

#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import annotations

from typing import TYPE_CHECKING, Sequence

from airflow.providers.microsoft.azure.hooks.wasb import WasbHook
from airflow.sensors.base import BaseSensorOperator

if TYPE_CHECKING:
    from airflow.utils.context import Context


class WasbBlobSensor(BaseSensorOperator):
    """
    Waits for a blob to arrive on Azure Blob Storage.

    :param container_name: Name of the container.
    :param blob_name: Name of the blob.
    :param wasb_conn_id: Reference to the :ref:`wasb connection <howto/connection:wasb>`.
    :param check_options: Optional keyword arguments that
        `WasbHook.check_for_blob()` takes.
    """

    template_fields: Sequence[str] = ('container_name', 'blob_name')

    def __init__(
        self,
        *,
        container_name: str,
        blob_name: str,
        wasb_conn_id: str = 'wasb_default',
        check_options: dict | None = None,
        **kwargs,
    ) -> None:
        super().__init__(**kwargs)
        if check_options is None:
            check_options = {}
        self.wasb_conn_id = wasb_conn_id
        self.container_name = container_name
        self.blob_name = blob_name
        self.check_options = check_options

    def poke(self, context: Context):
        self.log.info('Poking for blob: %s\n in wasb://%s', self.blob_name, self.container_name)
        hook = WasbHook(wasb_conn_id=self.wasb_conn_id)
        return hook.check_for_blob(self.container_name, self.blob_name, **self.check_options)


class WasbPrefixSensor(BaseSensorOperator):
    """
    Waits for blobs matching a prefix to arrive on Azure Blob Storage.

    :param container_name: Name of the container.
    :param prefix: Prefix of the blob.
    :param wasb_conn_id: Reference to the wasb connection.
    :param check_options: Optional keyword arguments that
        `WasbHook.check_for_prefix()` takes.
    """

    template_fields: Sequence[str] = ('container_name', 'prefix')

    def __init__(
        self,
        *,
        container_name: str,
        prefix: str,
        wasb_conn_id: str = 'wasb_default',
        check_options: dict | None = None,
        **kwargs,
    ) -> None:
        super().__init__(**kwargs)
        if check_options is None:
            check_options = {}
        self.wasb_conn_id = wasb_conn_id
        self.container_name = container_name
        self.prefix = prefix
        self.check_options = check_options

    def poke(self, context: Context) -> bool:
        self.log.info('Poking for prefix: %s in wasb://%s', self.prefix, self.container_name)
        hook = WasbHook(wasb_conn_id=self.wasb_conn_id)
        return hook.check_for_prefix(self.container_name, self.prefix, **self.check_options)

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