mirror of https://github.com/milvus-io/milvus.git
81 lines
2.3 KiB
Go
81 lines
2.3 KiB
Go
package milvusclient
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import (
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"context"
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"math"
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"github.com/cockroachdb/errors"
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"github.com/milvus-io/milvus/client/v2/entity"
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"github.com/milvus-io/milvus/pkg/v2/util/conc"
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"github.com/milvus-io/milvus/pkg/v2/util/merr"
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"github.com/milvus-io/milvus/pkg/v2/util/retry"
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"github.com/milvus-io/milvus/pkg/v2/util/typeutil"
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)
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// CollectionCache stores the cached collection schema information.
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type CollectionCache struct {
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sf conc.Singleflight[*entity.Collection]
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collections *typeutil.ConcurrentMap[string, *entity.Collection]
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fetcher func(context.Context, string) (*entity.Collection, error)
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}
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func (c *CollectionCache) GetCollection(ctx context.Context, collName string) (*entity.Collection, error) {
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coll, ok := c.collections.Get(collName)
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if ok {
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return coll, nil
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}
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coll, err, _ := c.sf.Do(collName, func() (*entity.Collection, error) {
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coll, err := c.fetcher(ctx, collName)
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if err != nil {
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return nil, err
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}
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c.collections.Insert(collName, coll)
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return coll, nil
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})
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return coll, err
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}
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// Evict removes the collection cache related to the provided collection name.
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func (c *CollectionCache) Evict(collName string) {
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c.collections.Remove(collName)
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}
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// Reset clears all cached info, used when client switching env.
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func (c *CollectionCache) Reset() {
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c.collections = typeutil.NewConcurrentMap[string, *entity.Collection]()
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}
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func NewCollectionCache(fetcher func(context.Context, string) (*entity.Collection, error)) *CollectionCache {
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return &CollectionCache{
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collections: typeutil.NewConcurrentMap[string, *entity.Collection](),
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fetcher: fetcher,
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}
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}
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func (c *Client) getCollection(ctx context.Context, collName string) (*entity.Collection, error) {
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return c.collCache.GetCollection(ctx, collName)
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}
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func (c *Client) retryIfSchemaError(ctx context.Context, collName string, work func(ctx context.Context) (uint64, error)) error {
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var lastTs uint64 = math.MaxUint64
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return retry.Handle(ctx, func() (bool, error) {
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ts, err := work(ctx)
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if err != nil {
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// if schema error
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if errors.Is(err, merr.ErrCollectionSchemaMismatch) {
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sameTs := ts == lastTs
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lastTs = ts
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if !sameTs {
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c.collCache.Evict(collName)
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}
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// retry if not same ts
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return !sameTs, err
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}
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return false, err
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}
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return false, nil
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})
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}
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