start implementing gw serve mux support

pkg/srv/grpc/logger.go

@@ -0,0 +1,51 @@
+package grpc
+
+import (
+	"context"
+
+	grpclogging "github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/logging"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+)
+
+// A grpc logging middleware compatible logger
+// implementation using a zerolog logger, either from
+// the global logger or a context logger
+type GRPCLogger struct {
+	logger zerolog.Logger
+}
+
+// Returns a grpcLogger using the global zerolog Logger
+func NewGRPCLogger() *GRPCLogger {
+	return &GRPCLogger{logger: log.Logger}
+}
+
+// Returns a grpcLogger using the zerolog logger in the provided context
+func NewGRPCContextLogger(ctx context.Context) *GRPCLogger {
+	logger := log.Ctx(ctx)
+	return &GRPCLogger{logger: *logger}
+}
+
+// Log logs the fields for given log level. We can assume users (middleware library) will put fields in pairs and
+// those will be unique.
+func (l *GRPCLogger) Log(ctx context.Context, level grpclogging.Level, msg string, fields ...any) {
+	var event *zerolog.Event
+
+	switch level {
+	case grpclogging.LevelDebug:
+		event = l.logger.Debug()
+	case grpclogging.LevelInfo:
+		event = l.logger.Info()
+	case grpclogging.LevelWarn:
+		event = l.logger.Warn()
+	case grpclogging.LevelError:
+		event = l.logger.Error()
+	default:
+		event = l.logger.Warn().
+			Int("unknowngrpcloglevel", int(level))
+	}
+
+	event.Ctx(ctx)
+	event.Fields(fields)
+	event.Msg(msg)
+}