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Add support for serialization of iceberg tables (#35456)
This adds lightweight support for serialization of Apache Iceberg tables. This means that references are captured and tables are re-instantiated with their catalog information.
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# | ||
# 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 | ||
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from typing import TYPE_CHECKING | ||
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from airflow.utils.module_loading import qualname | ||
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serializers = ["pyiceberg.table.Table"] | ||
deserializers = serializers | ||
stringifiers = serializers | ||
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if TYPE_CHECKING: | ||
from airflow.serialization.serde import U | ||
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__version__ = 1 | ||
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def serialize(o: object) -> tuple[U, str, int, bool]: | ||
from pyiceberg.table import Table | ||
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if not isinstance(o, Table): | ||
return "", "", 0, False | ||
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from airflow.models.crypto import get_fernet | ||
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# we encrypt the catalog information here until we have | ||
# global catalog management in airflow and the properties | ||
# can have sensitive information | ||
fernet = get_fernet() | ||
properties = {} | ||
for k, v in o.catalog.properties.items(): | ||
properties[k] = fernet.encrypt(v.encode("utf-8")).decode("utf-8") | ||
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data = { | ||
"identifier": o.identifier, | ||
"catalog_properties": properties, | ||
} | ||
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return data, qualname(o), __version__, True | ||
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def deserialize(classname: str, version: int, data: dict): | ||
from pyiceberg.catalog import load_catalog | ||
from pyiceberg.table import Table | ||
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from airflow.models.crypto import get_fernet | ||
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if version > __version__: | ||
raise TypeError("serialized version is newer than class version") | ||
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if classname == qualname(Table): | ||
fernet = get_fernet() | ||
properties = {} | ||
for k, v in data["catalog_properties"].items(): | ||
properties[k] = fernet.decrypt(v.encode("utf-8")).decode("utf-8") | ||
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catalog = load_catalog(data["identifier"][0], **properties) | ||
return catalog.load_table((data["identifier"][1], data["identifier"][2])) | ||
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raise TypeError(f"do not know how to deserialize {classname}") |
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