| # |
| # 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. |
| # |
| """ |
| Test pipeline for use by pubsub_integration_test. |
| """ |
| |
| from __future__ import absolute_import |
| |
| import argparse |
| |
| import apache_beam as beam |
| from apache_beam.options.pipeline_options import PipelineOptions |
| from apache_beam.options.pipeline_options import SetupOptions |
| from apache_beam.options.pipeline_options import StandardOptions |
| |
| |
| def run_pipeline(argv, with_attributes, id_label, timestamp_attribute): |
| """Build and run the pipeline.""" |
| |
| parser = argparse.ArgumentParser() |
| parser.add_argument( |
| '--output_topic', required=True, |
| help=('Output PubSub topic of the form ' |
| '"projects/<PROJECT>/topic/<TOPIC>".')) |
| parser.add_argument( |
| '--input_subscription', required=True, |
| help=('Input PubSub subscription of the form ' |
| '"projects/<PROJECT>/subscriptions/<SUBSCRIPTION>."')) |
| known_args, pipeline_args = parser.parse_known_args(argv) |
| |
| # We use the save_main_session option because one or more DoFn's in this |
| # workflow rely on global context (e.g., a module imported at module level). |
| pipeline_options = PipelineOptions(pipeline_args) |
| pipeline_options.view_as(SetupOptions).save_main_session = True |
| pipeline_options.view_as(StandardOptions).streaming = True |
| p = beam.Pipeline(options=pipeline_options) |
| runner_name = type(p.runner).__name__ |
| |
| # Read from PubSub into a PCollection. |
| if runner_name == 'TestDirectRunner': |
| messages = p | beam.io.ReadFromPubSub( |
| subscription=known_args.input_subscription, |
| with_attributes=with_attributes, |
| timestamp_attribute=timestamp_attribute) |
| else: |
| messages = p | beam.io.ReadFromPubSub( |
| subscription=known_args.input_subscription, |
| id_label=id_label, |
| with_attributes=with_attributes, |
| timestamp_attribute=timestamp_attribute) |
| |
| def add_attribute(msg, timestamp=beam.DoFn.TimestampParam): |
| msg.data += b'-seen' |
| msg.attributes['processed'] = 'IT' |
| if timestamp_attribute in msg.attributes: |
| msg.attributes[timestamp_attribute + '_out'] = timestamp.to_rfc3339() |
| return msg |
| |
| def modify_data(data): |
| return data + b'-seen' |
| |
| if with_attributes: |
| output = messages | 'add_attribute' >> beam.Map(add_attribute) |
| else: |
| output = messages | 'modify_data' >> beam.Map(modify_data) |
| |
| # Write to PubSub. |
| if runner_name == 'TestDirectRunner': |
| _ = output | beam.io.WriteToPubSub(known_args.output_topic, |
| with_attributes=with_attributes) |
| else: |
| _ = output | beam.io.WriteToPubSub(known_args.output_topic, |
| id_label=id_label, |
| with_attributes=with_attributes, |
| timestamp_attribute=timestamp_attribute) |
| |
| result = p.run() |
| result.wait_until_finish() |