superset feature_flag_manager 源码
superset feature_flag_manager 代码
文件路径：/superset/utils/feature_flag_manager.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 copy import deepcopy
from typing import Dict
from flask import Flask
class FeatureFlagManager:
def __init__(self) -> None:
super().__init__()
self._get_feature_flags_func = None
self._is_feature_enabled_func = None
self._feature_flags: Dict[str, bool] = {}
def init_app(self, app: Flask) -> None:
self._get_feature_flags_func = app.config["GET_FEATURE_FLAGS_FUNC"]
self._is_feature_enabled_func = app.config["IS_FEATURE_ENABLED_FUNC"]
self._feature_flags = app.config["DEFAULT_FEATURE_FLAGS"]
self._feature_flags.update(app.config["FEATURE_FLAGS"])
def get_feature_flags(self) -> Dict[str, bool]:
if self._get_feature_flags_func:
return self._get_feature_flags_func(deepcopy(self._feature_flags))
if callable(self._is_feature_enabled_func):
return dict(
map(
lambda kv: (kv[0], self._is_feature_enabled_func(kv[0], kv[1])),
self._feature_flags.items(),
)
)
return self._feature_flags
def is_feature_enabled(self, feature: str) -> bool:
"""Utility function for checking whether a feature is turned on"""
if self._is_feature_enabled_func:
return (
self._is_feature_enabled_func(feature, self._feature_flags[feature])
if feature in self._feature_flags
else False
)
feature_flags = self.get_feature_flags()
if feature_flags and feature in feature_flags:
return feature_flags[feature]
return False
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