introduce userlog service

Signed-off-by: jkoberg <jkoberg@owncloud.com>

services/userlog/pkg/command/server.go

@@ -0,0 +1,101 @@
+package command
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/cs3org/reva/v2/pkg/events"
+	"github.com/cs3org/reva/v2/pkg/events/stream"
+	"github.com/oklog/run"
+	"github.com/owncloud/ocis/v2/ocis-pkg/config/configlog"
+	ogrpc "github.com/owncloud/ocis/v2/ocis-pkg/service/grpc"
+	"github.com/owncloud/ocis/v2/ocis-pkg/version"
+	"github.com/owncloud/ocis/v2/services/userlog/pkg/config"
+	"github.com/owncloud/ocis/v2/services/userlog/pkg/config/parser"
+	"github.com/owncloud/ocis/v2/services/userlog/pkg/logging"
+	"github.com/owncloud/ocis/v2/services/userlog/pkg/metrics"
+	"github.com/owncloud/ocis/v2/services/userlog/pkg/server/http"
+	"github.com/urfave/cli/v2"
+	"go-micro.dev/v4/store"
+)
+
+// all events we care about
+var _registeredEvents = []events.Unmarshaller{
+	events.UploadReady{},
+}
+
+// Server is the entrypoint for the server command.
+func Server(cfg *config.Config) *cli.Command {
+	return &cli.Command{
+		Name:     "server",
+		Usage:    fmt.Sprintf("start the %s service without runtime (unsupervised mode)", cfg.Service.Name),
+		Category: "server",
+		Before: func(c *cli.Context) error {
+			return configlog.ReturnFatal(parser.ParseConfig(cfg))
+		},
+		Action: func(c *cli.Context) error {
+			logger := logging.Configure(cfg.Service.Name, cfg.Log)
+
+			err := ogrpc.Configure(ogrpc.GetClientOptions(cfg.GRPCClientTLS)...)
+			if err != nil {
+				return err
+			}
+
+			gr := run.Group{}
+			ctx, cancel := func() (context.Context, context.CancelFunc) {
+				if cfg.Context == nil {
+					return context.WithCancel(context.Background())
+				}
+				return context.WithCancel(cfg.Context)
+			}()
+			mtrcs := metrics.New()
+
+			defer cancel()
+
+			consumer, err := stream.NatsFromConfig(stream.NatsConfig(cfg.Events))
+			if err != nil {
+				return err
+			}
+
+			var st store.Store
+			switch cfg.Store.Type {
+			case "inmemory":
+				st = store.NewMemoryStore()
+			default:
+				return fmt.Errorf("unknown store '%s' configured", cfg.Store.Type)
+			}
+
+			mtrcs.BuildInfo.WithLabelValues(version.GetString()).Set(1)
+
+			{
+				server, err := http.Server(
+					http.Logger(logger),
+					http.Context(ctx),
+					http.Config(cfg),
+					http.Metrics(mtrcs),
+					http.Store(st),
+					http.Consumer(consumer),
+					http.RegisteredEvents(_registeredEvents),
+				)
+
+				if err != nil {
+					logger.Info().Err(err).Str("transport", "http").Msg("Failed to initialize server")
+					return err
+				}
+
+				gr.Add(func() error {
+					return server.Run()
+				}, func(err error) {
+					logger.Error().
+						Str("transport", "http").
+						Err(err).
+						Msg("Shutting down server")
+
+					cancel()
+				})
+			}
+
+			return gr.Run()
+		},
+	}
+}