54 lines
1.8 KiB
Go
54 lines
1.8 KiB
Go
package rpc
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import (
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"context"
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"time"
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"telesrv/internal/domain"
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"telesrv/internal/readmodelcache"
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)
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const (
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stickerCatalogCacheMaxEntries = 8
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// stickerCatalogCacheTTL 对齐客户端 trending/贴纸目录 ~5min 刷新率：TTL 内 getAllStickers/
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// getFeaturedStickers/getStickers(emoji 索引重建) 复用同一份集目录，避免每请求 ListStickerSets。
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stickerCatalogCacheTTL = 5 * time.Minute
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)
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// stickerCatalogCache 缓存 kind→贴纸集目录（全局、非 per-viewer：ListStickerSets 无用户维度）。
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// 内建 TTL + singleflight，让"先查后判 hash"的目录类 RPC 在 hash 命中时不打 PG。
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type stickerCatalogCache struct {
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cache *readmodelcache.Cache[domain.StickerSetKind, []domain.StickerSet]
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}
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func newStickerCatalogCache(now func() time.Time) *stickerCatalogCache {
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return &stickerCatalogCache{
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cache: readmodelcache.New[domain.StickerSetKind, []domain.StickerSet](readmodelcache.Config[domain.StickerSetKind, []domain.StickerSet]{
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MaxEntries: stickerCatalogCacheMaxEntries,
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TTL: stickerCatalogCacheTTL,
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Now: now,
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}),
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}
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}
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// stickerCatalogSets 返回某 kind 的（缓存的）贴纸集目录。Files 缺失或出错返回 nil。
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// 返回的切片只读（调用方不得修改元素），需要派生时各自计算 hash/过滤。
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func (r *Router) stickerCatalogSets(ctx context.Context, kind domain.StickerSetKind) []domain.StickerSet {
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if r.deps.Files == nil {
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return nil
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}
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if r.stickerCatalog == nil {
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sets, err := r.deps.Files.ListStickerSets(ctx, kind)
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if err != nil {
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return nil
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}
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return sets
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}
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sets, err := r.stickerCatalog.cache.GetOrLoad(ctx, kind, func() ([]domain.StickerSet, error) {
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return r.deps.Files.ListStickerSets(ctx, kind)
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})
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if err != nil {
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return nil
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}
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return sets
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}
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