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from __future__ import annotations

import tempfile
from typing import TYPE_CHECKING, Sequence

from airflow.models import BaseOperator
from import GlacierHook
from import GCSHook

    from airflow.utils.context import Context

[docs]class GlacierToGCSOperator(BaseOperator): """ Transfers data from Amazon Glacier to Google Cloud Storage. .. note:: Please be warn that GlacierToGCSOperator may depends on memory usage. Transferring big files may not working well. .. seealso:: For more information on how to use this operator, take a look at the guide: :ref:`howto/operator:GlacierToGCSOperator` :param aws_conn_id: The reference to the AWS connection details :param gcp_conn_id: The reference to the GCP connection details :param vault_name: the Glacier vault on which job is executed :param bucket_name: the Google Cloud Storage bucket where the data will be transferred :param object_name: the name of the object to check in the Google cloud storage bucket. :param gzip: option to compress local file or file data for upload :param chunk_size: size of chunk in bytes the that will be downloaded from Glacier vault :param google_impersonation_chain: Optional Google service account to impersonate using short-term credentials, or chained list of accounts required to get the access_token of the last account in the list, which will be impersonated in the request. If set as a string, the account must grant the originating account the Service Account Token Creator IAM role. If set as a sequence, the identities from the list must grant Service Account Token Creator IAM role to the directly preceding identity, with first account from the list granting this role to the originating account (templated). """
[docs] template_fields: Sequence[str] = ("vault_name", "bucket_name", "object_name")
def __init__( self, *, aws_conn_id: str | None = "aws_default", gcp_conn_id: str = "google_cloud_default", vault_name: str, bucket_name: str, object_name: str, gzip: bool, chunk_size: int = 1024, google_impersonation_chain: str | Sequence[str] | None = None, **kwargs, ) -> None: super().__init__(**kwargs) self.aws_conn_id = aws_conn_id self.gcp_conn_id = gcp_conn_id self.vault_name = vault_name self.bucket_name = bucket_name self.object_name = object_name self.gzip = gzip self.chunk_size = chunk_size self.impersonation_chain = google_impersonation_chain
[docs] def execute(self, context: Context) -> str: glacier_hook = GlacierHook(aws_conn_id=self.aws_conn_id) gcs_hook = GCSHook( gcp_conn_id=self.gcp_conn_id, impersonation_chain=self.impersonation_chain, ) job_id = glacier_hook.retrieve_inventory(vault_name=self.vault_name) with tempfile.NamedTemporaryFile() as temp_file: glacier_data = glacier_hook.retrieve_inventory_results( vault_name=self.vault_name, job_id=job_id["jobId"] ) # Read the file content in chunks using StreamingBody # stream = glacier_data["body"] for chunk in stream.iter_chunks(chunk_size=self.chunk_size): temp_file.write(chunk) temp_file.flush() gcs_hook.upload( bucket_name=self.bucket_name, object_name=self.object_name,, gzip=self.gzip, ) return f"gs://{self.bucket_name}/{self.object_name}"

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