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// Copyright 2019-2020 Google LLC
//
// 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 perform basic operations on
* subscriptions with the Google Cloud Pub/Sub API.
*
* For more information, see the README.md under /pubsub and the documentation
* at https://cloud.google.com/pubsub/docs.
*/
'use strict';
// sample-metadata:
// title: List Subscriptions On a Topic
// description: Lists all subscriptions in the current project, filtering by a topic.
// usage: node listTopicSubscriptions.js <topic-name>
function main(topicName = 'YOUR_TOPIC_NAME') {
// [START pubsub_list_topic_subscriptions]
/**
* TODO(developer): Uncomment this variable before running the sample.
*/
// const topicName = 'YOUR_TOPIC_NAME';
// Imports the Google Cloud client library
const {PubSub} = require('@google-cloud/pubsub');
// Creates a client; cache this for further use
const pubSubClient = new PubSub();
async function listTopicSubscriptions() {
// Lists all subscriptions for the topic
const [subscriptions] = await pubSubClient
.topic(topicName)
.getSubscriptions();
console.log(`Subscriptions for ${topicName}:`);
subscriptions.forEach(subscription => console.log(subscription.name));
}
listTopicSubscriptions().catch(console.error);
// [END pubsub_list_topic_subscriptions]
}
main(...process.argv.slice(2));