S3 has built-in functionality to trigger a Lambda function when certain events occur (e.g., object creation). For example, see http://docs.aws.amazon.com/lambda

S3 has built-in functionality to trigger a Lambda function when certain events occur (e.g., object creation). For example, see http://docs.aws.amazon.com/lambda/latest/dg/with-s3-example.html http://docs.aws.amazon.com/lambda/latest/dg/with-s3-example.....