Applying the Event Sourcing and CQRS Patterns

In this chapter, the following recipes will be covered:

• Creating a data lake
• Applying the event-first variant of the Event Sourcing pattern
• Creating a micro event store
• Applying the database-first variant of the Event Sourcing pattern with DynamoDB
• Applying the database-first variant of the Event Sourcing pattern with Cognito datasets
• Creating a materialized view in DynamoDB
• Creating a materialized view in S3
• Creating a materialized view in Elasticsearch
• Creating a materialized view in a Cognito dataset
• Replaying events
• Indexing the data lake
• Implementing bi-directional synchronization