support json schema

pkg/ambient/ambient.go

@@ -77,13 +77,17 @@ func (aw *AmbientWeather) Init() *AmbientWeather {
 	// Choose weather recorder for grpc / api requests,
 	// default is memory recorder
 	var r recorders.Recorder
-	switch aw.Config.RecorderConfig.Type {
-	case config.TypeMemory:
+	if aw.Config == nil || aw.Config.RecorderConfig == nil {
 		r = &memory.MemoryRecorder{}
-	case config.TypeRedis:
-		r = &redis.RedisRecorder{}
-	case config.TypeNoop:
-		r = &noop.NoopRecorder{}
+	} else {
+		switch aw.Config.RecorderConfig.Type {
+		case config.TypeMemory:
+			r = &memory.MemoryRecorder{}
+		case config.TypeRedis:
+			r = &redis.RedisRecorder{}
+		case config.TypeNoop:
+			r = &noop.NoopRecorder{}
+		}
 	}
 
 	aw.weatherRecorder = recorder.MustNewWeatherRecorder(&recorder.Opts{