superset dispatcher 源码
superset dispatcher 代码
文件路径：/superset/databases/commands/importers/dispatcher.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.
import logging
from typing import Any, Dict
from marshmallow.exceptions import ValidationError
from superset.commands.base import BaseCommand
from superset.commands.exceptions import CommandInvalidError
from superset.commands.importers.exceptions import IncorrectVersionError
from superset.databases.commands.importers import v1
logger = logging.getLogger(__name__)
command_versions = [v1.ImportDatabasesCommand]
class ImportDatabasesCommand(BaseCommand):
"""
Import databases.
This command dispatches the import to different versions of the command
until it finds one that matches.
"""
def __init__(self, contents: Dict[str, str], *args: Any, **kwargs: Any):
self.contents = contents
self.args = args
self.kwargs = kwargs
def run(self) -> None:
# iterate over all commands until we find a version that can
# handle the contents
for version in command_versions:
command = version(self.contents, *self.args, **self.kwargs)
try:
command.run()
return
except IncorrectVersionError:
logger.debug("File not handled by command, skipping")
except (CommandInvalidError, ValidationError) as exc:
# found right version, but file is invalid
logger.info("Command failed validation")
raise exc
except Exception as exc:
# validation succeeded but something went wrong
logger.exception("Error running import command")
raise exc
raise CommandInvalidError("Could not find a valid command to import file")
def validate(self) -> None:
pass
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