AWS SNS - How to get SNS topic by name

Question

I am working with AWS SNS to send push notifications to my app. To get a topic that I want, to send push notifications to, I need to load all topics – using SNS client function listTopics() - and check each topic to see if the ARN has the name of the topic that I'm looking for.

I think that it's a very inefficient way to get a topic ARN.  Is there a most efficient way to get this information, like a function getTopicByName?

If not, I'd like to know if ARN is immutable, and if can I store the topic ARN on my database?

Thanks.

Answer 1

If you know the topic already exists or you don't care if it gets created, then a much more direct approach, it is simply to call CreateTopic. Given a name, CreateTopic will return the existing topic, including the ARN.

Comments

What if you dont have createTopic permissions

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It'll throw an error saying "You are unauthorized to perform this action"