improve shutdown and app service boilerplate

pkg/demo/demo.go

@@ -0,0 +1,54 @@
+// Package demo provides a reference implementation
+// of service.AppService. It packages out the GRPC and HTTP
+// functionality, for the sake of structure.
+package demo
+
+import (
+	"context"
+
+	optsgrpc "gitea.libretechconsulting.com/rmcguire/go-app/pkg/srv/grpc/opts"
+	optshttp "gitea.libretechconsulting.com/rmcguire/go-app/pkg/srv/http/opts"
+
+	"gitea.libretechconsulting.com/rmcguire/go-server-with-otel/pkg/config"
+	"gitea.libretechconsulting.com/rmcguire/go-server-with-otel/pkg/demo/demogrpc"
+	"gitea.libretechconsulting.com/rmcguire/go-server-with-otel/pkg/demo/demohttp"
+	"gitea.libretechconsulting.com/rmcguire/go-server-with-otel/pkg/service"
+)
+
+type DemoService struct {
+	ctx    context.Context
+	config *config.ServiceConfig
+	http   *demohttp.DemoHTTPServer
+	grpc   *demogrpc.DemoGRPCServer
+}
+
+func (d *DemoService) Init(ctx context.Context, config *config.ServiceConfig,
+) (service.ShutdownFunc, error) {
+	d.config = config
+	d.ctx = ctx
+
+	// These don't HAVE to be split into separate packages
+	// This is, after all, a demo app. Just implement the interface.
+	d.http = demohttp.NewDemoHTTPServer(ctx, config)
+	d.grpc = demogrpc.NewDemoGRPCServer(ctx, config)
+
+	// TODO: This should actually do shutdown stuff
+	return func(_ context.Context) (string, error) {
+		return "DemoService", nil
+	}, nil
+}
+
+func (d *DemoService) GetGRPC() *optsgrpc.AppGRPC {
+	return &optsgrpc.AppGRPC{
+		Services:     d.grpc.GetServices(),
+		GRPCDialOpts: d.grpc.GetDialOpts(),
+	}
+}
+
+func (d *DemoService) GetHTTP() *optshttp.AppHTTP {
+	return &optshttp.AppHTTP{
+		Ctx:          d.ctx,
+		Funcs:        d.http.GetHandleFuncs(),
+		HealthChecks: d.http.GetHealthCheckFuncs(),
+	}
+}