nezha/service/singleton/server.go

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package singleton
import (
"sort"
"sync"
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"github.com/nezhahq/nezha/model"
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)
var (
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ServerList map[uint64]*model.Server // [ServerID] -> model.Server
ServerUUIDToID map[string]uint64 // [ServerUUID] -> ServerID
ServerLock sync.RWMutex
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SortedServerList []*model.Server // 用于存储服务器列表的 slice按照服务器 ID 排序
SortedServerListForGuest []*model.Server
SortedServerLock sync.RWMutex
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)
func InitServer() {
ServerList = make(map[uint64]*model.Server)
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ServerUUIDToID = make(map[string]uint64)
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}
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// loadServers 加载服务器列表并根据ID排序
func loadServers() {
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InitServer()
var servers []model.Server
DB.Find(&servers)
for _, s := range servers {
innerS := s
innerS.Host = &model.Host{}
innerS.State = &model.HostState{}
innerS.GeoIP = new(model.GeoIP)
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ServerList[innerS.ID] = &innerS
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ServerUUIDToID[innerS.UUID] = innerS.ID
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}
ReSortServer()
}
// ReSortServer 根据服务器ID 对服务器列表进行排序ID越大越靠前
func ReSortServer() {
ServerLock.RLock()
defer ServerLock.RUnlock()
SortedServerLock.Lock()
defer SortedServerLock.Unlock()
SortedServerList = make([]*model.Server, 0, len(ServerList))
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SortedServerListForGuest = make([]*model.Server, 0)
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for _, s := range ServerList {
SortedServerList = append(SortedServerList, s)
if !s.HideForGuest {
SortedServerListForGuest = append(SortedServerListForGuest, s)
}
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}
// 按照服务器 ID 排序的具体实现ID越大越靠前
sort.SliceStable(SortedServerList, func(i, j int) bool {
if SortedServerList[i].DisplayIndex == SortedServerList[j].DisplayIndex {
return SortedServerList[i].ID < SortedServerList[j].ID
}
return SortedServerList[i].DisplayIndex > SortedServerList[j].DisplayIndex
})
sort.SliceStable(SortedServerListForGuest, func(i, j int) bool {
if SortedServerListForGuest[i].DisplayIndex == SortedServerListForGuest[j].DisplayIndex {
return SortedServerListForGuest[i].ID < SortedServerListForGuest[j].ID
}
return SortedServerListForGuest[i].DisplayIndex > SortedServerListForGuest[j].DisplayIndex
})
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}
func OnServerDelete(sid []uint64) {
ServerLock.Lock()
defer ServerLock.Unlock()
for _, id := range sid {
serverUUID := ServerList[id].UUID
delete(ServerUUIDToID, serverUUID)
delete(ServerList, id)
}
}