Evgenii Stratonikov
286df198c9
Also, write tests. Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
87 lines
1.9 KiB
Go
87 lines
1.9 KiB
Go
package placement
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import (
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"crypto/sha256"
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"fmt"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/netmap"
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cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
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netmapSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
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oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
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)
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type netMapBuilder struct {
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nmSrc netmap.Source
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containerCache *ContainerNodesCache
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}
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type netMapSrc struct {
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netmap.Source
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nm *netmapSDK.NetMap
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}
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func NewNetworkMapBuilder(nm *netmapSDK.NetMap) Builder {
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return &netMapBuilder{
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nmSrc: &netMapSrc{nm: nm},
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containerCache: NewContainerNodesCache(0),
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}
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}
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func NewNetworkMapSourceBuilder(nmSrc netmap.Source) Builder {
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return &netMapBuilder{
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nmSrc: nmSrc,
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containerCache: NewContainerNodesCache(0),
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}
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}
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func (s *netMapSrc) GetNetMap(_ uint64) (*netmapSDK.NetMap, error) {
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return s.nm, nil
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}
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func (b *netMapBuilder) BuildPlacement(cnr cid.ID, obj *oid.ID, p netmapSDK.PlacementPolicy) ([][]netmapSDK.NodeInfo, error) {
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nm, err := netmap.GetLatestNetworkMap(b.nmSrc)
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if err != nil {
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return nil, fmt.Errorf("could not get network map: %w", err)
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}
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cn, err := b.containerCache.ContainerNodes(nm, cnr, p)
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if err != nil {
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return nil, err
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}
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return BuildObjectPlacement(nm, cn, obj)
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}
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func BuildObjectPlacement(nm *netmapSDK.NetMap, cnrNodes [][]netmapSDK.NodeInfo, id *oid.ID) ([][]netmapSDK.NodeInfo, error) {
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if id == nil {
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return cnrNodes, nil
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}
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binObj := make([]byte, sha256.Size)
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id.Encode(binObj)
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on, err := nm.PlacementVectors(cnrNodes, binObj)
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if err != nil {
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return nil, fmt.Errorf("could not get placement vectors for object: %w", err)
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}
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return on, nil
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}
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// FlattenNodes appends each row to the flat list.
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func FlattenNodes(ns [][]netmapSDK.NodeInfo) []netmapSDK.NodeInfo {
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var sz int
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for i := range ns {
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sz += len(ns[i])
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}
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result := make([]netmapSDK.NodeInfo, 0, sz)
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for i := range ns {
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result = append(result, ns[i]...)
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}
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return result
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}
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