Make caches singletons

core/artwork.go

@@ -12,6 +12,7 @@ import (
 	"io"
 	"os"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/deluan/navidrome/core/cache"
@@ -205,15 +206,23 @@ func readFromFile(path string) ([]byte, error) {
 	return buf.Bytes(), nil
 }
 
-func NewImageCache() ArtworkCache {
-	return cache.NewFileCache("Image", conf.Server.ImageCacheSize, consts.ImageCacheDir, consts.DefaultImageCacheMaxItems,
-		func(ctx context.Context, arg cache.Item) (io.Reader, error) {
-			info := arg.(*imageInfo)
-			reader, err := info.a.getArtwork(ctx, info.id, info.path, info.size)
-			if err != nil {
-				log.Error(ctx, "Error loading artwork art", "path", info.path, "size", info.size, err)
-				return nil, err
-			}
-			return reader, nil
-		})
+var (
+	onceImageCache     sync.Once
+	instanceImageCache ArtworkCache
+)
+
+func GetImageCache() ArtworkCache {
+	onceImageCache.Do(func() {
+		instanceImageCache = cache.NewFileCache("Image", conf.Server.ImageCacheSize, consts.ImageCacheDir, consts.DefaultImageCacheMaxItems,
+			func(ctx context.Context, arg cache.Item) (io.Reader, error) {
+				info := arg.(*imageInfo)
+				reader, err := info.a.getArtwork(ctx, info.id, info.path, info.size)
+				if err != nil {
+					log.Error(ctx, "Error loading artwork art", "path", info.path, "size", info.size, err)
+					return nil, err
+				}
+				return reader, nil
+			})
+	})
+	return instanceImageCache
 }