[#74] Replace atomics with mutex for reloadable params

Signed-off-by: Marina Biryukova <m.biryukova@yadro.com>

cmd/http-gw/app.go

@@ -50,7 +50,7 @@ type (
 		resolver  *resolver.ContainerResolver
 		metrics   *gateMetrics
 		services  []*metrics.Service
-		settings  *handler.Settings
+		settings  *appSettings
 		servers   []Server
 	}
 
@@ -69,6 +69,13 @@ type (
 		mu       sync.RWMutex
 		enabled  bool
 	}
+
+	// appSettings stores reloading parameters, so it has to provide getters and setters which use RWMutex.
+	appSettings struct {
+		mu               sync.RWMutex
+		defaultTimestamp bool
+		zipCompression   bool
+	}
 )
 
 // WithLogger returns Option to set a specific logger.
@@ -133,8 +140,32 @@ func newApp(ctx context.Context, opt ...Option) App {
 	return a
 }
 
+func (s *appSettings) DefaultTimestamp() bool {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.defaultTimestamp
+}
+
+func (s *appSettings) setDefaultTimestamp(val bool) {
+	s.mu.Lock()
+	s.defaultTimestamp = val
+	s.mu.Unlock()
+}
+
+func (s *appSettings) ZipCompression() bool {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.zipCompression
+}
+
+func (s *appSettings) setZipCompression(val bool) {
+	s.mu.Lock()
+	s.zipCompression = val
+	s.mu.Unlock()
+}
+
 func (a *app) initAppSettings() {
-	a.settings = &handler.Settings{}
+	a.settings = &appSettings{}
 
 	a.updateSettings()
 }
@@ -415,8 +446,8 @@ func (a *app) configReload(ctx context.Context) {
 }
 
 func (a *app) updateSettings() {
-	a.settings.SetDefaultTimestamp(a.cfg.GetBool(cfgUploaderHeaderEnableDefaultTimestamp))
-	a.settings.SetZipCompression(a.cfg.GetBool(cfgZipCompression))
+	a.settings.setDefaultTimestamp(a.cfg.GetBool(cfgUploaderHeaderEnableDefaultTimestamp))
+	a.settings.setZipCompression(a.cfg.GetBool(cfgZipCompression))
 }
 
 func (a *app) startServices() {