fix configuration

src/udi/dispatcher/dispatcher.go

@@ -21,11 +21,37 @@ var archiverChannel chan handler.MessageT = make(chan handler.MessageT, 100)
 func InitDispatcher() {
   log.Printf("Initializing dispatcher")
   go archiver()
-  handlerMap["TTN"] = ttn.NewTTNHandler()
-  handlerMap["IoT"] = iot.NewIoTHandler()
-  handlerMap["PV"] = pv.NewPvHandler(config.Config.Handlers["PV"])
-  handlerMap["MBGW3"] = mbgw3.NewMbgw3Handler(config.Config.Handlers["MBGW3"])
-  handlerMap["SVE"] = sve.NewSveHandler(config.Config.Handlers["SVE"])
+
+  for _, mapping := range config.Config.TopicMappings {
+    log.Printf("Trying to initialize %s", mapping)
+
+    var factory interface{}
+    switch mapping.Handler {
+    case "TTN":
+      factory = ttn.NewTTNHandler
+    case "IoT":
+      factory = iot.NewIoTHandler
+    case "PV":
+      factory = pv.NewPvHandler
+    case "MBGW3":
+      factory = mbgw3.NewMbgw3Handler
+    case "SVE":
+      factory = sve.NewSveHandler
+    default:
+      factory = nil
+      log.Printf("No handler %s found, ignore mapping", mapping.Handler)
+    }
+
+    fn, ok := factory.(func(config.HandlerConfigT) handler.Handler)
+    if ! ok {
+      log.Println("Typ Assertion failed")
+      break
+    }
+    handler := fn(mapping.Config)
+    handlerMap[mapping.Id] = handler
+  }
+
+  log.Printf("handlerMap: %s", handlerMap)
 }
 
 func storeMessage(filename string, item handler.MessageT) {
@@ -85,13 +111,13 @@ func handleMessage(message handler.MessageT) {
     for _, subscribedTopic := range mapping.Topics {
       // log.Printf("Testing %s in %s", message.Topic, subscribedTopic)
       if mqtt.TopicMatchesSubscription(message.Topic, subscribedTopic) {
-        log.Printf("Handle message in handler %s", mapping.Handler)
-        handler, exists := handlerMap[mapping.Handler]
+        log.Printf("Handle message in handler %s", mapping.Id)
+        handler, exists := handlerMap[mapping.Id]
         if exists {
           handler.Handle(message)
           return
         } else {
-          log.Printf("Handler %s not found, message %s is lost", mapping.Handler, message)
+          log.Printf("Handler %s not found, message %s is lost", mapping.Id, message)
         }
       }
     }