frostfs-node/pkg/services/reputation/common/managers.go

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package common
import (
"fmt"
"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
netmapcore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/netmap"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
apiNetmap "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
apireputation "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/reputation"
"git.frostfs.info/TrueCloudLab/hrw"
"go.uber.org/zap"
)
// managerBuilder is implementation of reputation ManagerBuilder interface.
// It sorts nodes in NetMap with HRW algorithms and
// takes the next node after the current one as the only manager.
type managerBuilder struct {
log *logger.Logger
nmSrc netmapcore.Source
opts *mngOptions
}
// ManagersPrm groups the required parameters of the managerBuilder's constructor.
//
// All values must comply with the requirements imposed on them.
// Passing incorrect parameter values will result in constructor
// failure (error or panic depending on the implementation).
type ManagersPrm struct {
NetMapSource netmapcore.Source
}
// NewManagerBuilder creates a new instance of the managerBuilder.
//
// Panics if at least one value of the parameters is invalid.
//
// The created managerBuilder does not require additional
// initialization and is completely ready for work.
func NewManagerBuilder(prm ManagersPrm, opts ...MngOption) ManagerBuilder {
switch {
case prm.NetMapSource == nil:
panic(fmt.Sprintf("invalid NetMapSource (%T):%v", prm.NetMapSource, prm.NetMapSource))
}
o := defaultMngOpts()
for i := range opts {
opts[i](o)
}
return &managerBuilder{
log: o.log,
nmSrc: prm.NetMapSource,
opts: o,
}
}
// implements Server on apiNetmap.NodeInfo.
type nodeServer apiNetmap.NodeInfo
func (x nodeServer) PublicKey() []byte {
return (apiNetmap.NodeInfo)(x).PublicKey()
}
func (x nodeServer) IterateAddresses(f func(string) bool) {
(apiNetmap.NodeInfo)(x).IterateNetworkEndpoints(f)
}
func (x nodeServer) NumberOfAddresses() int {
return (apiNetmap.NodeInfo)(x).NumberOfNetworkEndpoints()
}
func (x nodeServer) ExternalAddresses() []string {
return (apiNetmap.NodeInfo)(x).ExternalAddresses()
}
// BuildManagers sorts nodes in NetMap with HRW algorithms and
// takes the next node after the current one as the only manager.
func (mb *managerBuilder) BuildManagers(epoch uint64, p apireputation.PeerID) ([]ServerInfo, error) {
mb.log.Debug(logs.CommonStartBuildingManagers,
zap.Uint64("epoch", epoch),
zap.Stringer("peer", p),
)
nm, err := mb.nmSrc.GetNetMapByEpoch(epoch)
if err != nil {
return nil, err
}
nmNodes := nm.Nodes()
// make a copy to keep order consistency of the origin netmap after sorting
nodes := make([]apiNetmap.NodeInfo, len(nmNodes))
copy(nodes, nmNodes)
hrw.SortHasherSliceByValue(nodes, epoch)
for i := range nodes {
if apireputation.ComparePeerKey(p, nodes[i].PublicKey()) {
managerIndex := i + 1
if managerIndex == len(nodes) {
managerIndex = 0
}
return []ServerInfo{nodeServer(nodes[managerIndex])}, nil
}
}
return nil, nil
}
type mngOptions struct {
log *logger.Logger
}
type MngOption func(*mngOptions)
func defaultMngOpts() *mngOptions {
return &mngOptions{
log: &logger.Logger{Logger: zap.L()},
}
}
// WithLogger returns MngOption to specify logging component.
func WithLogger(l *logger.Logger) MngOption {
return func(o *mngOptions) {
if l != nil {
o.log = l
}
}
}