What is application protocol of SNS subscription?

Question

SNS allows subscriber has the following type of protocols

HTTP/S
Lambda
SQS
Email/JSON
Application

not sure what does Application protocol refers to

and how can I fill in the endpoint

(a example is arn:aws:sns:us-east-1:5555555555:endpoint/ADM/application-name/uuid)

Answer 1

SNS -- the way I see it, conceptually -- is really two different products under one AWS service.

• HTTP(S), Lambda, SQS, Email, Email/JSON, and SMS (you forgot SMS)

• Mobile push notifications (that's "application" -- mobile apps)

For the application protocol, the endpoint is the EndpointArn of a mobile app and device.

http://docs.aws.amazon.com/sns/latest/api/API_Subscribe.html

Unless you are sending a mobile push notification, you don't publish to an EndpointArn. You publish to a TopicArn.

For everything other than mobile push (https, email, sqs, etc.), when you send a message to a topic, it goes to all of the subscribers to the topic. The individual subscribers aren't individually-addressable (unless there's been a big change that I managed to miss; I welcome correction if that is the case).

With mobile push, you can send messages singly to individually-addressable endpoints (EndpointArn) or to all of the endpoints subscribed to a topic.