airflow json_schema 源码
airflow json_schema 代码
文件路径：/airflow/serialization/json_schema.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
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# 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
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"""jsonschema for validating serialized DAG and operator."""
from __future__ import annotations
import pkgutil
from typing import TYPE_CHECKING, Iterable
from airflow.exceptions import AirflowException
from airflow.settings import json
from airflow.typing_compat import Protocol
if TYPE_CHECKING:
import jsonschema
class Validator(Protocol):
"""
This class is only used for TypeChecking (for IDEs, mypy, etc)
due to the way ``Draft7Validator`` is created. They are created or do not inherit
from proper classes. Hence you can not have ``type: Draft7Validator``.
"""
def is_valid(self, instance) -> bool:
"""Check if the instance is valid under the current schema"""
...
def validate(self, instance) -> None:
"""Check if the instance is valid under the current schema, raising validation error if not"""
...
def iter_errors(self, instance) -> Iterable[jsonschema.exceptions.ValidationError]:
"""Lazily yield each of the validation errors in the given instance"""
...
def load_dag_schema_dict() -> dict:
"""Load & return Json Schema for DAG as Python dict"""
schema_file_name = 'schema.json'
schema_file = pkgutil.get_data(__name__, schema_file_name)
if schema_file is None:
raise AirflowException(f"Schema file {schema_file_name} does not exists")
schema = json.loads(schema_file.decode())
return schema
def load_dag_schema() -> Validator:
"""Load & Validate Json Schema for DAG"""
import jsonschema
schema = load_dag_schema_dict()
return jsonschema.Draft7Validator(schema)
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