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main.py
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main.py
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"""This module shows how to move data from BigQuery to AlloyDB with Dataflow"""
# Copyright 2023 Google LLC All Rights Reserved
#
# 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.
import argparse
import logging
import typing
import apache_beam as beam
from apache_beam.options.pipeline_options import PipelineOptions
from apache_beam.options.pipeline_options import SetupOptions
from apache_beam.io.jdbc import WriteToJdbc
from apache_beam import coders
class EthereumTokenTransfersRowType(typing.NamedTuple):
"""Class that defines the Row Type of the AlloyDB table"""
from_address: str
to_address: str
value: float
block_timestamp: str
def run(argv=None, save_main_session=True):
"""Runs the pipeline"""
parser = argparse.ArgumentParser()
parser.add_argument('--alloydb_username',
dest='alloydb_username',
required=True,
help='AlloyDB username')
parser.add_argument('--alloydb_password',
dest='alloydb_password',
required=True,
help='AlloyDB password')
parser.add_argument('--alloydb_ip',
dest='alloydb_ip',
required=True,
help='AlloyDB IP Address')
parser.add_argument('--alloydb_port',
dest='alloydb_port',
default="5432",
help='AlloyDB Port')
parser.add_argument('--alloydb_database',
dest='alloydb_database',
required=True,
help='AlloyDB Database name')
parser.add_argument('--alloydb_table',
dest='alloydb_table',
required=True,
help='AlloyDB table name')
parser.add_argument(
'--bq_query',
dest='bq_query',
required=True,
help='Query to be executed by BigQuery for extracting the source data')
known_args, pipeline_args = parser.parse_known_args(argv)
pipeline_options = PipelineOptions(pipeline_args)
pipeline_options.view_as(SetupOptions).save_main_session = save_main_session
with beam.Pipeline(options=pipeline_options) as p:
coders.registry.register_coder(EthereumTokenTransfersRowType,
coders.RowCoder)
(p | 'ReadFromBigQuery' >> beam.io.ReadFromBigQuery(
query=known_args.bq_query, use_standard_sql=True) |
'ConvertToRows' >> beam.Map(lambda bq_row: beam.Row(
from_address=bq_row['from_address'],
to_address=bq_row['to_address'],
value=bq_row['value'],
block_timestamp=bq_row['block_timestamp'].isoformat()
)).with_output_types(EthereumTokenTransfersRowType) | 'Write to jdbc'
>> WriteToJdbc(driver_class_name='org.postgresql.Driver',
table_name=known_args.alloydb_table,
jdbc_url=(f'jdbc:postgresql://{known_args.alloydb_ip}:'
f'{known_args.alloydb_port}'
f'/{known_args.alloydb_database}'),
username=known_args.alloydb_username,
password=known_args.alloydb_password,
connection_properties='stringtype=unspecified'))
if __name__ == '__main__':
logging.getLogger().setLevel(logging.INFO)
run()