/
peers.go
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/
peers.go
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package peers
import (
request2 "github.com/Futuremine-chain/future/service/request"
log "github.com/Futuremine-chain/future/tools/log/log15"
"github.com/Futuremine-chain/future/types"
"github.com/libp2p/go-libp2p-core/peer"
"math/rand"
"sync"
"time"
)
const (
module = "peers"
maxPeers = 1000000
monitoringInterval = 60 * 30
)
type Peers struct {
local *types.Peer
cache map[string]*types.Peer
remove map[string]*types.Peer
idList []string
rwm sync.RWMutex
close chan bool
peerInfo map[string]*types.Local
infoWm sync.RWMutex
reqHandler request2.IRequestHandler
}
func NewPeers(reqHandler request2.IRequestHandler) *Peers {
return &Peers{
cache: make(map[string]*types.Peer, maxPeers),
remove: make(map[string]*types.Peer, maxPeers),
close: make(chan bool),
peerInfo: make(map[string]*types.Local),
reqHandler: reqHandler,
}
}
func (p *Peers) Name() string {
return module
}
func (p *Peers) Start() error {
log.Info("Peers started successfully", "module", module)
go p.monitoring()
go p.peerLocal()
return nil
}
func (p *Peers) Stop() error {
log.Info("Peers was stopped", "module", module)
return nil
}
func (p *Peers) Info() map[string]interface{} {
return map[string]interface{}{
"connections": p.Count(),
}
}
func (p *Peers) AddressExist(address *peer.AddrInfo) bool {
p.rwm.RLock()
defer p.rwm.RUnlock()
if _, ok := p.cache[address.ID.String()]; !ok {
return false
}
return true
}
func (p *Peers) AddPeer(peer *types.Peer) {
p.rwm.Lock()
defer p.rwm.Unlock()
if len(p.cache) >= maxPeers {
return
}
if peer.Speed == 0 {
peer.Speed = 500
}
p.cache[peer.Address.ID.String()] = peer
p.idList = append(p.idList, peer.Address.ID.String())
log.Info("Add a peer", "module", module, "id", peer.Address.ID.String(), "address", peer.Address.String())
}
func (p *Peers) RemovePeer(reId string) {
p.rwm.Lock()
defer p.rwm.Unlock()
for index, id := range p.idList {
if id == reId {
p.idList = append(p.idList[0:index], p.idList[index+1:]...)
if peer, ok := p.cache[reId]; ok {
delete(p.cache, reId)
p.remove[reId] = peer
log.Info("Delete a peer", "id", reId)
}
break
}
}
}
func (p *Peers) SetSpeed(id string, speed uint64) {
p.rwm.Lock()
defer p.rwm.Unlock()
if peer, ok := p.cache[id]; ok {
p.cache[peer.Address.ID.String()].Speed = speed
}
}
func (p *Peers) monitoring() {
t := time.NewTicker(time.Second * monitoringInterval)
defer t.Stop()
for {
select {
case _ = <-t.C:
for id, peer := range p.remove {
if id != p.local.Address.ID.String() {
if p.isAlive(peer) && !p.AddressExist(peer.Address) {
p.AddPeer(peer)
}
}
}
for id, peer := range p.cache {
if id != p.local.Address.ID.String() {
if !p.isAlive(peer) {
p.RemovePeer(id)
}
}
}
}
}
}
func (p *Peers) peerLocal() {
t := time.NewTicker(time.Second * 180)
defer t.Stop()
for {
select {
case _ = <-t.C:
p.requestPeerLocal()
}
}
}
func (p *Peers) requestPeerLocal() {
peers := p.PeersMap()
for id, peer := range peers {
if id != p.local.Address.ID.String() {
local, err := p.reqHandler.LocalInfo(peer.Conn)
if err == nil {
p.infoWm.Lock()
p.peerInfo[id] = local
p.infoWm.Unlock()
}
}
}
}
func (p *Peers) isAlive(peer *types.Peer) bool {
stream, err := peer.Conn.Create(peer.Address.ID)
if err != nil {
return false
}
stream.Reset()
stream.Close()
return true
}
func (p *Peers) RandomPeer() *types.Peer {
p.rwm.Lock()
defer p.rwm.Unlock()
if len(p.idList) == 0 {
return nil
}
index := rand.New(rand.NewSource(time.Now().Unix())).Int31n(int32(len(p.idList)))
peerId := p.idList[index]
return p.cache[peerId]
}
func (p *Peers) Local() *types.Peer {
return p.local
}
func (p *Peers) SetLocal(local *types.Peer) {
p.local = local
}
func (p *Peers) PeersMap() map[string]*types.Peer {
p.rwm.RLock()
defer p.rwm.RUnlock()
re := make(map[string]*types.Peer)
for key, value := range p.cache {
re[key] = value
}
return re
}
func (p *Peers) PeersInfo() []*types.Local {
p.infoWm.RLock()
defer p.infoWm.RUnlock()
re := make([]*types.Local, len(p.peerInfo))
i := 0
for _, value := range p.peerInfo {
re[i] = value
i++
}
return re
}
func (p *Peers) Count() uint32 {
p.rwm.RLock()
defer p.rwm.RUnlock()
count := uint32(len(p.cache))
return count
}
func (p *Peers) Peer(id string) *types.Peer {
p.rwm.RLock()
defer p.rwm.RUnlock()
peer := p.cache[id]
return peer
}