Experimenting with AWS API Gateway default response and triggering AWS Lambda

Question

I have been trying to use AWS API Gateway and AWS Lambda to implement a  serverless architecture. Have been going through various blogs and AWS documentation. Even  tried out sample GET/POST operations. But, I have the following requirements w.r.t tracking user events from my custom application:

• Events are posted from my application to API end point
• I wanted the API to respond back with a custom response(acknowledging that the request has been received)
• After the response is sent, hand over the event payload to a AWS Lambda function

 As per the documentation, I understand, a) I can post events to API end point b) On GET/POST trigger an AWS Lambda Function - Respond back from AWS Lambda function to API request.

But what i want is 

a) Post events to API end point a.0) Respond back acknowledging that request is received [Say {'fine'} ] b) Trigger AWS Lambda function to process the event payload.

Any kind of suggestions are welcome.

 

Answer 1

You can try out the following steps 

1. Post an event to an API Gateway endpoint
2. Trigger an AWS Lambda Function A
3. Call asynchronously a Lambda Function B using the AWS SDK in the Lambda Function A
4. Call context.succeed() or context.done() or the callback function in the Lambda Function Aso it respond back to API Gateway
5. The Lambda Function B can process the data while API Gateway already received a response