pkg/proxy/config: clean up file.Run()

pkg/proxy/config/file.go

@@ -77,35 +77,38 @@ func (impl ConfigSourceFile) Run() {
 		data, err := ioutil.ReadFile(impl.filename)
 		if err != nil {
 			glog.Errorf("Couldn't read file: %s : %v", impl.filename, err)
-		} else {
-			var config ConfigFile
-			err = json.Unmarshal(data, &config)
-			if err != nil {
-				glog.Errorf("Couldn't unmarshal configuration from file : %s %v", data, err)
-			} else {
-				if !bytes.Equal(lastData, data) {
-					lastData = data
-					// Ok, we have a valid configuration, send to channel for
-					// rejiggering.
-					newServices := make([]api.Service, len(config.Services))
-					newEndpoints := make([]api.Endpoints, len(config.Services))
-					for i, service := range config.Services {
-						newServices[i] = api.Service{JSONBase: api.JSONBase{ID: service.Name}, Port: service.Port}
-						newEndpoints[i] = api.Endpoints{Name: service.Name, Endpoints: service.Endpoints}
-					}
-					if !reflect.DeepEqual(lastServices, newServices) {
-						serviceUpdate := ServiceUpdate{Op: SET, Services: newServices}
-						impl.serviceChannel <- serviceUpdate
-						lastServices = newServices
-					}
-					if !reflect.DeepEqual(lastEndpoints, newEndpoints) {
-						endpointsUpdate := EndpointsUpdate{Op: SET, Endpoints: newEndpoints}
-						impl.endpointsChannel <- endpointsUpdate
-						lastEndpoints = newEndpoints
-					}
-				}
-			}
+			continue
 		}
+
+		if bytes.Equal(lastData, data) {
+			continue
+		}
+		lastData = data
+
+		config := new(ConfigFile)
+		if err = json.Unmarshal(data, config); err != nil {
+			glog.Errorf("Couldn't unmarshal configuration from file : %s %v", data, err)
+			continue
+		}
+		// Ok, we have a valid configuration, send to channel for
+		// rejiggering.
+		newServices := make([]api.Service, len(config.Services))
+		newEndpoints := make([]api.Endpoints, len(config.Services))
+		for i, service := range config.Services {
+			newServices[i] = api.Service{JSONBase: api.JSONBase{ID: service.Name}, Port: service.Port}
+			newEndpoints[i] = api.Endpoints{Name: service.Name, Endpoints: service.Endpoints}
+		}
+		if !reflect.DeepEqual(lastServices, newServices) {
+			serviceUpdate := ServiceUpdate{Op: SET, Services: newServices}
+			impl.serviceChannel <- serviceUpdate
+			lastServices = newServices
+		}
+		if !reflect.DeepEqual(lastEndpoints, newEndpoints) {
+			endpointsUpdate := EndpointsUpdate{Op: SET, Endpoints: newEndpoints}
+			impl.endpointsChannel <- endpointsUpdate
+			lastEndpoints = newEndpoints
+		}
+
 		time.Sleep(5 * time.Second)
 	}
 }