enhancing logging. code broken

hodu.go

@@ -14,14 +14,13 @@ const (
 )
 
 type Logger interface {
-	Write (level LogLevel, fmt string, args ...interface{})
+	Write (id string, level LogLevel, fmt string, args ...interface{})
 }
 
 type Service interface {
-	RunTask (wg *sync.WaitGroup) // blocking. run the actual task loop
+	RunTask (wg *sync.WaitGroup) // blocking. run the actual task loop. it must call wg.Done() upon exit from itself.
 	StartService(data interface{}) // non-blocking. spin up a service. it may be invokded multiple times for multiple instances
 	StopServices() // non-blocking. send stop request to all services spun up
 	WaitForTermination() // blocking. must wait until all services are stopped
+	WriteLog(id string, level LogLevel, fmt string, args ...interface{})
 }
-
-type ExtTask func(svc Service, wg *sync.WaitGroup)