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Getting money into a wallet in Inflow takes five HTTP requests and nine in-process reactions nobody documents. Reconstructing that path from source is the only way to get it - and every failure along it returns 204 No Content.
Trill's Timeline service stores each story body once and fans out only the identifier into every follower's sorted set - the right hybrid design, executed as a sequential foreach with one Redis round trip per follower and no batching anywhere.
What an in-process event dispatcher actually guarantees when there is no outbox, no dead letter, no correlation id and no drain on shutdown - and the one static field the whole thing depends on.
Nobody in Pacco approves an order - a vehicle reservation does. A tour of DevMentors' parcel-delivery estate, the domain it models, and the fifteen-part series it earns.
A retrospective on nine DShop services - the order aggregate and checkout saga that genuinely work, sitting next to the discount that only prints, the emails that never send, and a currency guard that guards nothing. Part 15 of Nine Services and a Message Bus.
DShop answers the shared-kernel question twice - eight services copy every event contract locally, one references a shared package - and both answers are in the same estate with their real costs on show. Part 4 of Nine Services and a Message Bus.
DShop moves data between services two opposite ways - one rebuilds a local replica from the event payload, the other treats the event as a doorbell and fetches over HTTP - and the estate runs both at once. Part 5 of Nine Services and a Message Bus.
The same event is declared three times across DShop, and one copy quietly drops a field - here is the contract drift in the real source and the canonical-model cure that would have caught it. Part 3 of Nine Services and a Message Bus.
DShop is one e-commerce shop stamped out as nine microservices over RabbitMQ - this series reads the real source to see how the topology holds together and where it drifts. Part 1 of Nine Services and a Message Bus.
