/
list_lite_topics_example.py
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/
list_lite_topics_example.py
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#!/usr/bin/env python
# Copyright 2020 Google Inc. 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.
"""This application demonstrates how to list topics with the Pub/Sub
Lite API. For more information, see the root level README.md and the
documentation at https://cloud.google.com/pubsub/lite/docs/topics.
"""
import argparse
def list_lite_topics(project_number, cloud_region, zone_id, regional):
# [START pubsublite_list_topics]
from google.cloud.pubsublite import AdminClient
from google.cloud.pubsublite.types import CloudRegion, CloudZone, LocationPath
# TODO(developer):
# project_number = 1122334455
# cloud_region = "us-central1"
# zone_id = "a"
# regional = True
location = None
if regional:
# A region.
location = CloudRegion(cloud_region)
else:
# A zone.
location = CloudZone(CloudRegion(cloud_region), zone_id)
location_path = LocationPath(project_number, location)
client = AdminClient(cloud_region)
response = client.list_topics(location_path)
for topic in response:
print(topic)
print(f"{len(response)} topic(s) listed in your project and location.")
# [END pubsublite_list_topics]
if __name__ == "__main__":
parser = argparse.ArgumentParser(
description=__doc__,
formatter_class=argparse.RawDescriptionHelpFormatter,
)
parser.add_argument("project_number", help="Your Google Cloud Project Number")
parser.add_argument("cloud_region", help="Your Cloud Region, e.g. 'us-central1'")
parser.add_argument("zone_id", help="Your Zone ID, e.g. 'a'")
parser.add_argument("regional", type=bool, help="Regional topic or not")
args = parser.parse_args()
list_lite_topics(
args.project_number,
args.cloud_region,
args.zone_id,
args.regional,
)