package client import ( "context" "github.com/milvus-io/milvus/client/v2/entity" "github.com/milvus-io/milvus/pkg/util/conc" "github.com/milvus-io/milvus/pkg/util/typeutil" ) // CollectionCache stores the cached collection schema information. type CollectionCache struct { sf conc.Singleflight[*entity.Collection] collections *typeutil.ConcurrentMap[string, *entity.Collection] fetcher func(context.Context, string) (*entity.Collection, error) } func (c *CollectionCache) GetCollection(ctx context.Context, collName string) (*entity.Collection, error) { coll, ok := c.collections.Get(collName) if ok { return coll, nil } coll, err, _ := c.sf.Do(collName, func() (*entity.Collection, error) { coll, err := c.fetcher(ctx, collName) if err != nil { return nil, err } c.collections.Insert(collName, coll) return coll, nil }) return coll, err } // Reset clears all cached info, used when client switching env. func (c *CollectionCache) Reset() { c.collections = typeutil.NewConcurrentMap[string, *entity.Collection]() } func NewCollectionCache(fetcher func(context.Context, string) (*entity.Collection, error)) *CollectionCache { return &CollectionCache{ collections: typeutil.NewConcurrentMap[string, *entity.Collection](), fetcher: fetcher, } } func (c *Client) getCollection(ctx context.Context, collName string) (*entity.Collection, error) { return c.collCache.GetCollection(ctx, collName) }