refactor datasource caching

pkg/services/cache/cache.go

@@ -0,0 +1,17 @@
+package cache
+
+import (
+	"time"
+
+	gocache "github.com/patrickmn/go-cache"
+)
+
+type CacheService struct {
+	*gocache.Cache
+}
+
+func New(defaultExpiration, cleanupInterval time.Duration) *CacheService {
+	return &CacheService{
+		Cache: gocache.New(defaultExpiration, cleanupInterval),
+	}
+}