integration/read-bq-write-bq/transforms.py

# Copyright 2020 Spotify AB
#
# Licensed 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.
#
"""
Klio DoFn for basic integration test.
"""
import apache_beam as beam

import json

from klio.transforms import decorators


class LogKlioMessage(beam.DoFn):
    @decorators.handle_klio
    def process(self, item):
        self._klio.logger.info("Hello, Klio!")
        self._klio.logger.info("Received element {}".format(item.element))
        self._klio.logger.info("Received payload {}".format(item.payload))

        element_str = item.element.decode("utf-8")
        row = {"entity_id": element_str, "value": element_str}
        yield json.dumps(row)