implement grpc gateway and addl handler support

pkg/app/init.go

@@ -0,0 +1,70 @@
+package app
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/codes"
+
+	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/otel"
+	srvgrpc "gitea.libretechconsulting.com/rmcguire/go-app/pkg/srv/grpc"
+	grpcopts "gitea.libretechconsulting.com/rmcguire/go-app/pkg/srv/grpc/opts"
+	srvhttp "gitea.libretechconsulting.com/rmcguire/go-app/pkg/srv/http"
+)
+
+func (a *App) initGRPC(ctx context.Context) error {
+	ctx, span := a.tracer.Start(ctx, "init.grpc")
+	defer span.End()
+
+	shutdown, doneChan, err := srvgrpc.InitGRPCServer(ctx,
+		&grpcopts.GRPCOpts{
+			GRPCConfig: a.cfg.GRPC,
+			AppGRPC:    a.GRPC,
+		})
+	if err != nil {
+		span.RecordError(err)
+		span.SetStatus(codes.Error, err.Error())
+		return err
+	}
+
+	a.shutdownFuncs = append(a.shutdownFuncs, shutdown)
+	a.GRPC.GRPCDone = doneChan
+
+	span.SetStatus(codes.Ok, "")
+	return nil
+}
+
+func (a *App) initHTTP(ctx context.Context) error {
+	var err error
+	var httpShutdown shutdownFunc
+
+	_, span := a.tracer.Start(ctx, "init.http")
+	defer span.End()
+
+	span.SetAttributes(
+		attribute.Int("numHTTPFuncs", len(a.HTTP.Funcs)),
+		attribute.Int("numHTTPMiddlewares", len(a.HTTP.Middleware)),
+		attribute.Int("numHTTPHealthChecks", len(a.HTTP.HealthChecks)),
+	)
+
+	a.HTTP.Ctx = a.AppContext
+	httpShutdown, a.HTTP.HTTPDone, err = srvhttp.InitHTTPServer(a.HTTP)
+
+	a.shutdownFuncs = append(a.shutdownFuncs, httpShutdown)
+
+	if err != nil {
+		span.RecordError(err)
+		span.SetStatus(codes.Error, err.Error())
+	} else {
+		span.SetStatus(codes.Ok, "")
+	}
+
+	return err
+}
+
+func (a *App) initOTEL() {
+	var otelShutdown shutdownFunc
+	a.AppContext, otelShutdown = otel.Init(a.AppContext)
+	a.shutdownFuncs = append(a.shutdownFuncs, otelShutdown)
+	a.tracer = otel.MustTracerFromCtx(a.AppContext)
+}