Source code for airflow.providers.microsoft.azure.sensors.wasb

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from typing import Optional

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



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

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


[docs]    template_fields = ('container_name', 'blob_name')


    @apply_defaults
    def __init__(
        self,
        *,
        container_name: str,
        blob_name: str,
        wasb_conn_id: str = 'wasb_default',
        check_options: Optional[dict] = 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


[docs]    def poke(self, context: dict):
        self.log.info('Poking for blob: %s\nin 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)




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

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


[docs]    template_fields = ('container_name', 'prefix')


    @apply_defaults
    def __init__(
        self,
        *,
        container_name: str,
        prefix: str,
        wasb_conn_id: str = 'wasb_default',
        check_options: Optional[dict] = 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


[docs]    def poke(self, context: dict) -> 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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