add role conversion service

node/service/role_conversion.go

@@ -0,0 +1,52 @@
+package service
+
+import (
+	"github.com/harmony-one/harmony/internal/utils"
+)
+
+// RoleConversion is the role conversion service.
+type RoleConversion struct {
+	stopChan    chan struct{}
+	stoppedChan chan struct{}
+}
+
+// NewRoleConversion returns role conversion service.
+func NewRoleConversion() *RoleConversion {
+	return &RoleConversion{}
+}
+
+// StartService starts role conversion service.
+func (cs *RoleConversion) StartService() {
+	cs.stopChan = make(chan struct{})
+	cs.stoppedChan = make(chan struct{})
+
+	cs.Init()
+	cs.Run(cs.stopChan, cs.stoppedChan)
+}
+
+// Init initializes role conversion service.
+func (cs *RoleConversion) Init() {
+}
+
+// Run runs role conversion.
+func (cs *RoleConversion) Run(stopChan chan struct{}, stoppedChan chan struct{}) {
+	go func() {
+		defer close(stoppedChan)
+		for {
+			select {
+			default:
+				utils.GetLogInstance().Info("Running role conversion")
+			case <-stopChan:
+				return
+			}
+		}
+	}()
+}
+
+// StopService stops role conversion service.
+func (cs *RoleConversion) StopService() {
+	utils.GetLogInstance().Info("Stopping role conversion service.")
+	cs.stopChan <- struct{}{}
+	<-cs.stoppedChan
+	utils.GetLogInstance().Info("Role conversion stopped.")
+}