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The complete honest ledger for a Key Vault-backed service discovery layer after years in production - the debts I would pay tomorrow, the trade-offs I would sign again, and the concrete signals that it is time to graduate to App Configuration, APIM, Dapr or a mesh. Part 8, the finale of Service Discovery Without a Service Mesh.
FeedR's weather feed is the pattern for every external integration: poll a REST API inside an IAsyncEnumerable, guard it with a typed HttpClient and Polly retries, translate its JSON at the boundary, and republish it as a push. Plus the retry clause I can't defend and a hard-coded API key with a lesson in it. Part 6 of the FeedR deep dive.
Pacco ships a second API gateway built on Ocelot that hand-rolls everything the Ntrada YAML declares - auth bypass, async bus routes, edge-minted IDs, correlation headers - plus the estate's only circuit breakers. It is instructive, revealing, and deployed by absolutely nothing.
AssignVehicleToOrder is the one command in Pacco that cannot finish alone - Orders calls Vehicles, then Pricing, and Pricing calls Customers, a synchronous enrichment chain on the write path of a messaging estate. At the end of it sits a deliberately bus-less calculator with a loyalty ladder, an unassigned Id and a discount logged in dollars.
A complete broker-requeue retry implementation sits in DShop.Common's subscriber, fully written and never called - and its comment explains exactly why.
