Subscribing SNS to SQS in AWS?

Question

Looking at this image :

The messages are really imporant hence I use a queue in the middle. But now - On the right side SNS , I need to have multiple subscribers ( Lambdas).

But now, How can I subscribe the right side SNS to the SQS on the center ?

Question:

Is it possible to subscribe SNS to SQS ? ( meaning - passing the messages from SQS to an SNS)

Answer 1

SNS is a topic, it does not subscribe to anything. It cannot receive data, it needs to be published to.

However, you can publish to it from an application code. For this, you can attach a consumer to your SQS in the middle. This could be a Java application or a simple lambda code.

Here are a few references for doing it in various languages.

1. Java and .NET
2. Python
3. Node JS

Answer 2

First of all create a new Lambda function to send message to a SNS topic . Refer this - https://github.com/aws-samples/serverless-app-examples/tree/master/python/step-functions-send-to-sns

And then you can configure your queue to trigger that Lambda function on receiving of payload.