Source code for airflow.providers.google.cloud.links.base

#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
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# 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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from datetime import datetime
from typing import TYPE_CHECKING, ClassVar, Optional

from airflow.models import BaseOperatorLink, XCom

if TYPE_CHECKING:
    from airflow.models.taskinstance import TaskInstanceKey


[docs]class BaseGoogleLink(BaseOperatorLink):
    """:meta private:"""

[docs]    name: ClassVar[str]
[docs]    key: ClassVar[str]
[docs]    format_str: ClassVar[str]

[docs]    def get_link(
        self,
        operator,
        dttm: Optional[datetime] = None,
        ti_key: Optional["TaskInstanceKey"] = None,
    ) -> str:
        if ti_key is not None:
            conf = XCom.get_value(key=self.key, ti_key=ti_key)
        else:
            assert dttm
            conf = XCom.get_one(
                key=self.key,
                dag_id=operator.dag.dag_id,
                task_id=operator.task_id,
                execution_date=dttm,
            )

        return self.format_str.format(**conf) if conf else ""