Cloud Native Development Patterns and Best Practices

Example – database-first event sourcing

This example builds on the cloud-native database and event stream examples and pieces them together to demonstrate the publishing side of the Database-First Variant. As depicted in the diagram at the top of the pattern, a command writes to the database (AWS DynamoDB) and a stream processor (AWS Lambda) consumes the database events, transforms them to domain events, and then publishes the domain events to the event stream (AWS Kinesis). The following fragment from a Serverless Framework serverless.yml file demonstrates provisioning a function to be triggered by a cloud-native database, such as AWS DynamoDB. It is very similar to consuming from an event stream. This also shows configuring environment ...