Saga

Dapr Workflow Go Tutorial: Orchestrated Saga Pattern Compensation handlers configuration in Dapr to guarantee atomic rollback. How to handle transient workflows when the orchestrator instance restarts mid-transaction. Most Go developers building microservices know the Choreography Saga pattern: service A emits an event, service B reacts, service C reacts to B, and so on. If step C fails, services emit “compensation” events in reverse order. The pattern works elegantly for simple flows, but breaks down as the number of steps grows: debugging a failed saga requires tracing events across five message broker topics, and implementing compensation logic requires every service to understand the full saga’s state. ...

Mastering Event-Driven Architecture with Dapr Pub/Sub in Go In my previous post, we explored how abandoning monolithic architecture in favor of strict Domain-Driven Design (DDD) bounded contexts allowed an e-commerce platform to scale beyond 10,000+ orders per day. However, splitting one big database into 20+ isolated Postgres databases introduces a terrifying new problem: How do we maintain data consistency across disconnected services? The answer is Event-Driven Architecture (EDA). Rather than chaining blocking synchronous HTTP calls across the network — which guarantees a cascading failure if a single service is down — each microservice independently broadcasts out-of-band “Events” through a centralized broker. Services are decoupled from each other’s availability. A brief outage in the Notification service does not cause a checkout failure. ...