refactor: Modular inbound/outbound manager

adapter/lifecycle.go

@@ -0,0 +1,41 @@
+package adapter
+
+type StartStage uint8
+
+const (
+	StartStateInitialize StartStage = iota
+	StartStateStart
+	StartStatePostStart
+	StartStateStarted
+)
+
+var ListStartStages = []StartStage{
+	StartStateInitialize,
+	StartStateStart,
+	StartStatePostStart,
+	StartStateStarted,
+}
+
+func (s StartStage) Action() string {
+	switch s {
+	case StartStateInitialize:
+		return "initialize"
+	case StartStateStart:
+		return "start"
+	case StartStatePostStart:
+		return "post-start"
+	case StartStateStarted:
+		return "start-after-started"
+	default:
+		panic("unknown stage")
+	}
+}
+
+type NewService interface {
+	NewStarter
+	Close() error
+}
+
+type NewStarter interface {
+	Start(stage StartStage) error
+}