Bun Service-Oriented Systems: From Modular Monolith to Production

Build ParcelFlow as a tenant-aware order-to-delivery system on Bun: begin with a modular monolith, make state and contracts durable, then extract, observe, deploy, and retire services only when measured coupling and failure evidence justify each boundary.

1. 01One Request, One Complete SystemBuild: ParcelFlow accepts one tenant-scoped order and returns a delivery promise from one Bun process.Published 09 Aug 20267 sections
2. 02Choose Bun and an HTTP FrameworkDecision: keep Bun, adopt Hono as ParcelFlow’s HTTP layer, and preserve a framework-neutral application core.Published 09 Aug 20269 sections
3. 03DRY, SRP, IoC, DI, and the Composition RootRefactor: make ParcelFlow’s policy independent from Hono, Bun.SQL, and the fake payment adapter without adding a DI container.Published 09 Aug 20269 sections
4. 04Durable State, Transactions, and IdempotencyPersist: move ParcelFlow to PostgreSQL through Bun.SQL and prove retries, concurrency, rollback, and restart behaviour.Published 09 Aug 20269 sections
5. 05Earn the First Service BoundaryPublished 09 Aug 20266 sections
6. 06Synchronous Contracts and API EvolutionPublished 09 Aug 20267 sections
7. 07Events, Outbox, and Idempotent ConsumersPublished 09 Aug 20267 sections
8. 08Resilience Under Partial FailurePublished 09 Aug 20267 sections
9. 09Identity, Tenant Isolation, and Service AuthorityBind every human and workload request to one tenant and one explicit permission before it reaches ParcelFlow data.Published 09 Aug 202610 sections
10. 10Observability as an Operating LoopTurn ParcelFlow behavior into correlated evidence, an accountable decision, and a measured recovery.Published 09 Aug 202611 sections
11. 11Containerize and Deploy with PulumiTurn tested ParcelFlow services into immutable Bun containers and a reviewable AWS release with canary rollback.Published 09 Aug 20269 sections
12. 12Full-System E2E Proof and RetirementProve ParcelFlow as one customer system: release, attack, fail, recover, roll back, export, revoke, disable, and retire.Published 09 Aug 202613 sections