configx-watch

configx-watch

Demonstrates configx Watch hot reload.

Run from repository root:

go run ./examples/configx-watch

Expected output (timing may vary):

loaded config: log.level=info
watching log.level... (rewrite the file to trigger reload)
rewrote file: log.level=debug
reload detected: log.level=debug
done

The example writes a config file, loads it, registers a Watch callback on log.level, then rewrites the file to trigger a reload. The watcher (backed by fsnotify) detects the file change and fires the callback.

Watch contract:

• Watch(key, observer) requires the key to exist at registration time.
• Multiple observers per key are supported.
• Observers fire synchronously inside Load; keep them short and non-blocking.
• Use an atomic.Value to ferry the new value back to your application code.

For the full pattern (including WithResolveActualTypes, layered env override, and custom decoders), see configx/example_test.go and configx/example_business_test.go.