Documentation
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Overview ¶
Command service is the Tier-B example main from the flows design (§18.6): a plug-and-play HTTP service that runs the engine IN-PROCESS with still ZERO third-party dependencies. It wires the full service stack — a registry of compiled graphs, an in-memory control plane, the worker loop (flow.Serve), and the REST ingress — behind a single, secure-defaults http.Server.
The composition mirrors §18.6's Tier-B snippet exactly, so the Tier-B→C upgrade (durable + distributed over NATS, Phase 9) is just two constructor swaps — controlplane.Mem()/flow.NewMemStore() → nats.ControlPlane(nc)/ nats.Store(nc) — with the graph, worker loop, and ingress wiring unchanged.
main() IS dependency injection: it constructs the concretions (store, control plane, registry, auth) and hands them to the engine seams. The wiring is factored into buildService(ctx) so it is testable WITHOUT binding a real port (the smoke test drives the returned handler via httptest); main() then serves it on a real socket via ingress.Server's secure defaults and shuts down cleanly on SIGINT/SIGTERM.
Source Files