Subscription

Subscription to a topic will push messages to the subscriber's protocol whenever a new message is published. For subscription, we need to select the protocol and provide the endpoint of the protocol. So the endpoint-owner needs to confirm the subscription and then only SNS is able to deliver messages to the endpoint. Subscription confirmation is a URL which is received at endpoint-owner ends. This URL contains a token which will help SNS to subscribe the endpoint to a specific token and this token is valid for 3 days.

Let's see how we can subscribe to a topic using email protocol.

AWS Management Console

Go to the AWS SNS Management Console at https://console.aws.amazon.com/sns/v2/home and perform the following steps:

1. Click on Topics in the navigation pane on the left.
2. Click on aws-bootcamp ARN, displayed on the topic listing screen:

Figure 8.3: Topic details

3. Click Create subscription:

Figure 8.4: Creating a subscription

Provide details as follows:

• Topic ARN: By default, Topic ARN will...