Go lifecycle

Go maker initialization, graph construction, source-last startup, and context-bounded drain.

When to use

Use this page when implementing maker hooks, owning resources, or diagnosing startup and shutdown.

initMakers fills missing defaults, then customMakersInit may replace them.
initFunctions and infrastructure makers use errgroup for concurrent creation and sibling cancellation.
ServiceApp.Start builds streams and starts managed connectors, storage, pools, components, Sinks, then Sources.
StopService creates the timeout context consumed by every stop phase.

ConfigurationLoad graph configResolve typed service, stream, connector, and endpoint settings.

FactoriesinitMakersInstall defaults, then run customMakersInit and customFunctionsInit.

ConstructionInvoke makers onceCreate infrastructure and long-lived functions in parallel.

GraphBuild and bindConstruct streams, callers, endpoint consumers, and transports.

StartOpen admission lastStart dependencies and Sinks before Sources and servers.

SignalStop requestedCreate one deadline from shutdownTimeout.

AdmissionListeners and SourcesReject new root work and drain accepted calls.

GraphNested workKeep pools, storage, Sinks, and clients alive.

ResourcesPools, storage, SinksRelease graph dependencies in safe order.

TelemetryFlush and releaseMetrics, traces, and logs stop last.

HTTP admission, components, and ordinary Sources stop first.
Managed connector admission stops after ordinary Sources, preserving Cron-to-Temporal work.
Nested parallel graph calls drain before pools and storage.
Sinks stop before managed clients; telemetry stops last.

Generated extension points and runtime-owned lifecycle boundaries.

PropertyTypeDescription

initMakersgenerated

Installs defaults only where no maker exists.

customMakersInituser hook

Replaces makers before construction.

customFunctionsInituser hook

Adjusts instances before stream construction.

Start(ctx)runtime

Activates downstream resources before Sources.

Stop(ctx)runtime

Uses the deadline applied by StopService.

configure -> make once -> bind -> start -> admit -> drain -> stop