Using AWS Lambda for streaming analytics

Description

Summary

• In this blog post, I explain how this feature works with Kinesis Data Streams and DynamoDB Streams, together with example use-cases.
• For example, in Amazon Kinesis Data Firehose, a Lambda function transforms the current batch of records with no information or state from previous batches.
• The third tumbling window invokes the Lambda function with a state value of 18 and the next window of values.
• This function code processes the incoming event to aggregate a sales attribute, and return this aggregated result in a state object.