Part 7: Phase 2 — Dual-Write with Dapr PubSub
← Previous Chapter: Part 6: Phase 1 — Strangler Fig Read-Only | Series Table of Contents | Next Chapter: Part 8: Phase 3 — Full Cutover Zero Downtime → Answer-first: Phase 2 enables write APIs on the Go microservice system alongside Magento thanks to asynchronous Dual-Write via Dapr Pub/Sub and the Transactional Outbox, with feature flags and automatic data conflict resolution. In Phase 1, both systems existed side by side but only one of them was allowed to write data: Magento. In Phase 2, both systems write at the same time. This is the most technically complex stage — and the place where most migration projects corrupt their own data if they do not have a crystal-clear conflict resolution strategy prepared up front. ...