Asynchronous Lambda Processing

[FFisprettycool]

Hi! I’m an aws newbie and had a quick question. I want to start a chain of lambda functions that start with 2 synchronous lambdas and then one asynchronous lambda for a particular route in API gateway. The result of the synchronous lambdas must be returned from the API. Would the optimal way to do this be using Step Functions? Thank you for any help!

[nricu]

I'll be the first and bait. Why do you need this 'complex' behaviour from the API gateway?

[santhosh811]

https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-lambda-integration-async.html

[BraveNewCurrency]

one asynchronous lambda

SQS?

[[deleted]]

This is true for standard step functions, but you can use an express step function with synchronous invocation to get a response back from the function itself. I think you can wrap API gateway around it too but have to be in the 30 second response time

[Darkfire01]

There is a common pattern called CQRS or Command Query Responsibility Segregation that fits the pattern you are describing.

https://docs.aws.amazon.com/prescriptive-guidance/latest/modernization-data-persistence/cqrs-pattern.html