callbacks service draft

api/edge/callbacks/internal/ops/module.go

@@ -0,0 +1,36 @@
+package ops
+
+import (
+	"context"
+	"time"
+
+	"github.com/tech/sendico/pkg/api/routers/health"
+	"github.com/tech/sendico/pkg/mlogger"
+)
+
+// Observer records service metrics.
+type Observer interface {
+	ObserveIngest(result string, duration time.Duration)
+	ObserveDelivery(result string, statusCode int, duration time.Duration)
+}
+
+// HTTPServer exposes /metrics and /health.
+type HTTPServer interface {
+	SetStatus(status health.ServiceStatus)
+	Close(ctx context.Context)
+}
+
+// HTTPServerConfig configures observability endpoint.
+type HTTPServerConfig struct {
+	Address string
+}
+
+// NewObserver creates process metrics observer.
+func NewObserver() Observer {
+	return newObserver()
+}
+
+// NewHTTPServer creates observability HTTP server.
+func NewHTTPServer(logger mlogger.Logger, cfg HTTPServerConfig) (HTTPServer, error) {
+	return newHTTPServer(logger, cfg)
+}