Created
November 11, 2018 08:06
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| import argparse | |
| def list_subscriptions_in_topic(project_id, topic_name): | |
| from google.cloud import pubsub_v1 | |
| publisher = pubsub_v1.PublisherClient() | |
| topic_path = publisher.topic_path(project_id, topic_name) | |
| for subscription in publisher.list_topic_subscriptions(topic_path): | |
| print(subscription) | |
| def create_subscription(project_id, topic_name, subscription_name): | |
| from google.cloud import pubsub_v1 | |
| subscriber = pubsub_v1.SubscriberClient() | |
| topic_path = subscriber.topic_path(project_id, topic_name) | |
| subscription_path = subscriber.subscription_path( | |
| project_id, subscription_name) | |
| subscription = subscriber.create_subscription( | |
| subscription_path, topic_path) | |
| print('Subscription created: {}'.format(subscription)) | |
| def receive_messages(project_id, subscription_name): | |
| import time | |
| from google.cloud import pubsub_v1 | |
| subscriber = pubsub_v1.SubscriberClient() | |
| subscription_path = subscriber.subscription_path( | |
| project_id, subscription_name) | |
| def callback(message): | |
| print('Received message: {}'.format(message)) | |
| message.ack() | |
| subscriber.subscribe(subscription_path, callback=callback) | |
| print('Listening for messages on {}'.format(subscription_path)) | |
| while True: | |
| time.sleep(60) | |
| if __name__ == '__main__': | |
| parser = argparse.ArgumentParser( | |
| description=__doc__, | |
| formatter_class=argparse.RawDescriptionHelpFormatter | |
| ) | |
| parser.add_argument('project_id', help='Your Google Cloud project ID') | |
| subparsers = parser.add_subparsers(dest='command') | |
| list_in_topic_parser = subparsers.add_parser( | |
| 'list_in_topic', help=list_subscriptions_in_topic.__doc__) | |
| list_in_topic_parser.add_argument('topic_name') | |
| create_parser = subparsers.add_parser( | |
| 'create', help=create_subscription.__doc__) | |
| create_parser.add_argument('topic_name') | |
| create_parser.add_argument('subscription_name') | |
| receive_parser = subparsers.add_parser( | |
| 'receive', help=receive_messages.__doc__) | |
| receive_parser.add_argument('subscription_name') | |
| args = parser.parse_args() | |
| if args.command == 'list_in_topic': | |
| list_subscriptions_in_topic(args.project_id, args.topic_name) | |
| elif args.command == 'create': | |
| create_subscription( | |
| args.project_id, args.topic_name, args.subscription_name) | |
| elif args.command == 'receive': | |
| receive_messages(args.project_id, args.subscription_name) |
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