forked from TrueCloudLab/frostfs-node
[#35] Implement netmap source interface in morph wrapper
Netmap source interface used by object service to build placement based on current or previous network map. Signed-off-by: Alex Vanin <alexey@nspcc.ru>
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1 changed files with 37 additions and 6 deletions
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@ -1,12 +1,43 @@
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package wrapper
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// NetMap represents the NeoFS network map.
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// FIXME: correct the definition.
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type NetMap struct{}
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import (
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"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
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v2netmap "github.com/nspcc-dev/neofs-api-go/v2/netmap"
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grpcNetmap "github.com/nspcc-dev/neofs-api-go/v2/netmap/grpc"
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client "github.com/nspcc-dev/neofs-node/pkg/morph/client/netmap"
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"github.com/pkg/errors"
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)
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// GetNetMap receives information list about storage nodes
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// through the Netmap contract call, composes network map
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// from them and returns it.
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func (w *Wrapper) GetNetMap() (*NetMap, error) {
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panic("implement me")
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// from them and returns it. With diff == 0 returns current
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// network map, else return snapshot of previous network map.
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func (w Wrapper) GetNetMap(diff uint64) (*netmap.Netmap, error) {
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args := client.GetSnapshotArgs{}
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args.SetDiff(diff)
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peers, err := w.client.Snapshot(args)
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if err != nil {
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return nil, err
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}
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rawPeers := peers.Peers() // slice of serialized node infos
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infos := make([]v2netmap.NodeInfo, 0, len(rawPeers))
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for _, peer := range rawPeers {
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grpcNodeInfo := new(grpcNetmap.NodeInfo) // transport representation of struct
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err = grpcNodeInfo.Unmarshal(peer)
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if err != nil {
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// consider unmarshalling into different major versions
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// of NodeInfo structure, if there any
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return nil, errors.Wrap(err, "can't unmarshal peer info")
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}
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v2 := v2netmap.NodeInfoFromGRPCMessage(grpcNodeInfo)
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infos = append(infos, *v2)
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}
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nodes := netmap.NodesFromV2(infos)
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return netmap.NewNetmap(nodes)
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}
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