v1 List subscriptions in topic (DEPRECATED)

(DEPRECATED) List subscriptions in topic

Code sample

Go

Before trying this sample, follow the Go setup instructions in the Pub/Sub quickstart using client libraries. For more information, see the Pub/Sub Go API reference documentation.

To authenticate to Pub/Sub, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import (
	"context"
	"fmt"

	"cloud.google.com/go/pubsub"
	"google.golang.org/api/iterator"
)

func listSubscriptions(projectID, topicID string) ([]*pubsub.Subscription, error) {
	// projectID := "my-project-id"
	// topicName := "projects/sample-248520/topics/ocr-go-test-topic"
	ctx := context.Background()
	client, err := pubsub.NewClient(ctx, projectID)
	if err != nil {
		return nil, fmt.Errorf("pubsub.NewClient: %w", err)
	}
	defer client.Close()

	var subs []*pubsub.Subscription

	it := client.Topic(topicID).Subscriptions(ctx)
	for {
		sub, err := it.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			return nil, fmt.Errorf("Next: %w", err)
		}
		subs = append(subs, sub)
	}
	return subs, nil
}

Ruby

Before trying this sample, follow the Ruby setup instructions in the Pub/Sub quickstart using client libraries. For more information, see the Pub/Sub Ruby API reference documentation.

To authenticate to Pub/Sub, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

# topic_id = "your-topic-id"

pubsub = Google::Cloud::Pubsub.new

topic         = pubsub.topic topic_id
subscriptions = topic.subscriptions

puts "Subscriptions in topic #{topic.name}:"
subscriptions.each do |subscription|
  puts subscription.name
end

What's next

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