improve ss

pkg/metadata/metadata.go

@@ -0,0 +1,61 @@
+package metadata
+
+import "time"
+
+type Metadata interface {
+	Get(key string) interface{}
+	GetBool(key string) bool
+	GetInt(key string) int
+	GetFloat(key string) float64
+	GetString(key string) string
+	GetDuration(key string) time.Duration
+}
+
+type MapMetadata map[string]interface{}
+
+func (m MapMetadata) Get(key string) interface{} {
+	if m != nil {
+		return m[key]
+	}
+	return nil
+}
+
+func (m MapMetadata) GetBool(key string) (v bool) {
+	if m != nil {
+		v, _ = m[key].(bool)
+	}
+	return
+}
+
+func (m MapMetadata) GetInt(key string) (v int) {
+	if m != nil {
+		v, _ = m[key].(int)
+	}
+	return
+}
+
+func (m MapMetadata) GetFloat(key string) (v float64) {
+	if m != nil {
+		v, _ = m[key].(float64)
+	}
+	return
+}
+
+func (m MapMetadata) GetString(key string) (v string) {
+	if m != nil {
+		v, _ = m[key].(string)
+	}
+	return
+}
+
+func (m MapMetadata) GetDuration(key string) (v time.Duration) {
+	if m != nil {
+		switch vv := m[key].(type) {
+		case int:
+			return time.Duration(vv) * time.Second
+		case string:
+			v, _ = time.ParseDuration(vv)
+		}
+	}
+	return
+}