group update batch

pkg/common/db/cache/utils.go

@@ -0,0 +1,49 @@
+package cache
+
+import (
+	"Open_IM/pkg/utils"
+	"context"
+	"encoding/json"
+	"github.com/dtm-labs/rockscache"
+	"time"
+)
+
+func GetCache[T any](ctx context.Context, rcClient *rockscache.Client, key string, expire time.Duration, fn func(ctx context.Context) (T, error)) (T, error) {
+	var t T
+	var write bool
+	v, err := rcClient.Fetch(key, expire, func() (s string, err error) {
+		t, err = fn(ctx)
+		if err != nil {
+			return "", err
+		}
+		bs, err := json.Marshal(t)
+		if err != nil {
+			return "", utils.Wrap(err, "")
+		}
+		write = true
+		return string(bs), nil
+	})
+	if err != nil {
+		return t, err
+	}
+	if write {
+		return t, nil
+	}
+	err = json.Unmarshal([]byte(v), &t)
+	if err != nil {
+		return t, utils.Wrap(err, "")
+	}
+	return t, nil
+}
+
+func GetCacheFor[E any, T any](ctx context.Context, rcClient *rockscache.Client, list []E, fn func(ctx context.Context, item E) (T, error)) ([]T, error) {
+	rs := make([]T, 0, len(list))
+	for _, e := range list {
+		r, err := fn(ctx, e)
+		if err != nil {
+			return nil, err
+		}
+		rs = append(rs, r)
+	}
+	return rs, nil
+}