In my last website post I talked about my plans for setting up website notifications on AWS Lambda and DynamoDB. The idea is that a function on AWS Lambda would get called when the site had an update, which would fetch all the site data, diff it against the previous state, and determine which pages actually changed. Those changes would get saved to AWS DynamoDB, which has a streaming feature that other AWS Lambda functions can be triggered by for each event. Multiple Lambda functions (one for each service) would get those updates and fire off whatever integration was necessary for each service.

This would put the burden of running the service and hosting the data to Amazon’s ops crew, which is undoubtedly better than what I would have set up. As long as I stayed within the limits of the AWS free tier, which looked pretty decent, I would be able to run this in perpetuity, right?

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