90 lines
2 KiB
Go
90 lines
2 KiB
Go
package tree
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import (
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"bytes"
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"crypto/sha256"
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"fmt"
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"sync"
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"github.com/hashicorp/golang-lru/simplelru"
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"github.com/nspcc-dev/neofs-node/pkg/core/container"
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"github.com/nspcc-dev/neofs-node/pkg/services/object_manager/placement"
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cidSDK "github.com/nspcc-dev/neofs-sdk-go/container/id"
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netmapSDK "github.com/nspcc-dev/neofs-sdk-go/netmap"
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)
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type containerCache struct {
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sync.Mutex
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nm *netmapSDK.NetMap
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lru *simplelru.LRU
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}
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func (c *containerCache) init() {
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c.lru, _ = simplelru.NewLRU(defaultContainerCacheSize, nil) // no error, size is positive
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}
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type containerCacheItem struct {
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cnr *container.Container
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local int
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nodes []netmapSDK.NodeInfo
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}
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const defaultContainerCacheSize = 10
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// getContainerNodes returns nodes in the container and a position of local key in the list.
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func (s *Service) getContainerNodes(cid cidSDK.ID) ([]netmapSDK.NodeInfo, int, error) {
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nm, err := s.nmSource.GetNetMap(0)
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if err != nil {
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return nil, -1, fmt.Errorf("can't get netmap: %w", err)
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}
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cnr, err := s.cnrSource.Get(cid)
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if err != nil {
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return nil, -1, fmt.Errorf("can't get container: %w", err)
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}
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cidStr := cid.String()
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s.containerCache.Lock()
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if s.containerCache.nm != nm {
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s.containerCache.lru.Purge()
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} else if v, ok := s.containerCache.lru.Get(cidStr); ok {
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item := v.(containerCacheItem)
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if item.cnr == cnr {
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s.containerCache.Unlock()
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return item.nodes, item.local, nil
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}
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}
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s.containerCache.Unlock()
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policy := cnr.Value.PlacementPolicy()
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rawCID := make([]byte, sha256.Size)
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cid.Encode(rawCID)
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cntNodes, err := nm.ContainerNodes(policy, rawCID)
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if err != nil {
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return nil, -1, err
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}
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nodes := placement.FlattenNodes(cntNodes)
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localPos := -1
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for i := range nodes {
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if bytes.Equal(nodes[i].PublicKey(), s.rawPub) {
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localPos = i
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break
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}
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}
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s.containerCache.Lock()
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s.containerCache.nm = nm
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s.containerCache.lru.Add(cidStr, containerCacheItem{
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cnr: cnr,
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local: localPos,
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nodes: nodes,
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})
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s.containerCache.Unlock()
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return nodes, localPos, err
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}
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