frostfs-node/pkg/services/object_manager/placement/netmap.go

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package placement
import (
netmapSDK "github.com/nspcc-dev/neofs-api-go/pkg/netmap"
"github.com/nspcc-dev/neofs-api-go/pkg/object"
"github.com/nspcc-dev/neofs-node/pkg/core/netmap"
"github.com/pkg/errors"
)
type netMapBuilder struct {
nmSrc netmap.Source
}
type netMapSrc struct {
nm *netmapSDK.Netmap
}
func NewNetworkMapBuilder(nm *netmapSDK.Netmap) Builder {
return &netMapBuilder{
nmSrc: &netMapSrc{nm},
}
}
func NewNetworkMapSourceBuilder(nmSrc netmap.Source) Builder {
return &netMapBuilder{
nmSrc: nmSrc,
}
}
func (s *netMapSrc) GetNetMap(diff uint64) (*netmapSDK.Netmap, error) {
return s.nm, nil
}
func (b *netMapBuilder) BuildPlacement(a *object.Address, p *netmapSDK.PlacementPolicy) ([]netmapSDK.Nodes, error) {
nm, err := netmap.GetLatestNetworkMap(b.nmSrc)
if err != nil {
return nil, errors.Wrap(err, "could not get network map")
}
cn, err := nm.GetContainerNodes(p, a.ContainerID().ToV2().GetValue())
if err != nil {
return nil, errors.Wrap(err, "could not get container nodes")
}
return BuildObjectPlacement(nm, cn, a.ObjectID())
}
func BuildObjectPlacement(nm *netmapSDK.Netmap, cnrNodes netmapSDK.ContainerNodes, id *object.ID) ([]netmapSDK.Nodes, error) {
objectID := id.ToV2()
if objectID == nil {
return cnrNodes.Replicas(), nil
}
on, err := nm.GetPlacementVectors(cnrNodes, objectID.GetValue())
if err != nil {
return nil, errors.Wrap(err, "could not get placement vectors for object")
}
return on, nil
}
// FlattenNodes appends each row to the flat list.
func FlattenNodes(ns []netmapSDK.Nodes) netmapSDK.Nodes {
result := make(netmapSDK.Nodes, 0, len(ns))
for i := range ns {
result = append(result, ns[i]...)
}
return result
}