" Slicing Monolith into a CQRS / Event sourcing microservice: joys and pains"
summary
Wallapop slices a payment/delivery slice out of a monolith into CQRS and event sourced microservices using Axon + Spring + Kotlin, RabbitMQ and MySQL, and deploys it live. Migrations run without downtime by replaying commands to rebuild projections, eventual consistency is handled with server push notifications to the client, and failures to third parties use dead-letter queue retries with exponential backoff. Event evolution uses versioned events or compensating “fix” events rather than in-place edits. Result: faster, smaller-team releases and resilient processing in production.
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chapters (6)
- 0:00Start
- 9:21Event storming session
- 17:00Solutions
- 31:01Migration
- 32:58Hard to understand flows
- 33:28Store flow state
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