/
clusters.go
165 lines (151 loc) · 3.39 KB
/
clusters.go
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package httpfsclient
import (
"sync"
"time"
"github.com/RocksonZeta/httpfsclient/kv"
)
var clusters *Clusters
var serverUts sync.Map
func init() {
serverUts = sync.Map{} //clusterId:serverId => ServerUt
clusters = new(Clusters)
}
type ServerUt struct {
Ut int64
UpdateCount int
}
func GetClusters() *Clusters {
return clusters
}
func GetServer(clusterId, serverId string) Server {
cs := GetClusters()
if nil == cs {
return Server{}
}
return cs.GetServer(clusterId, serverId)
}
func InitClusters(url string, clusterIds ...string) {
conf := kv.RedisConfig{
Url: url,
}
factory := kv.NewFactory(&conf)
load(factory, clusterIds...)
go func() {
ticker := time.NewTicker(60 * time.Second)
for {
select {
case <-ticker.C:
load(factory, clusterIds...)
}
}
}()
}
// load redis clusters
func load(factory *kv.ServiceFactory, clusterIds ...string) {
redis := factory.Get()
defer redis.Close()
for _, cid := range clusterIds {
var servers map[string]Server
redis.HMGetAll(cid, &servers)
cluster := &Cluster{Id: cid}
for k, v := range servers {
v.available = available(v)
cluster.servers.Store(k, v)
}
clusters.clusters.Store(cid, cluster)
}
}
func available(server Server) bool {
if s, ok := serverUts.Load(server.Id()); ok {
if su, ok1 := s.(ServerUt); ok1 {
var r bool
if su.Ut != server.Ut {
r = true
su.UpdateCount = 0
} else {
r = su.UpdateCount <= 5
su.UpdateCount++
}
su.Ut = server.Ut
serverUts.Store(server.Id(), su)
return r
}
}
serverUts.Store(server.Id(), ServerUt{Ut: server.Ut, UpdateCount: 0})
return true
}
//Clusters include many clusters
type Clusters struct {
// clusters map[string]Cluster // clusterId :Server
clusters sync.Map // clusterId :*Server
}
func (c *Clusters) GetCluster(clusterId string) (*Cluster, bool) {
if cluster, ok := c.clusters.Load(clusterId); ok {
return cluster.(*Cluster), ok
}
return nil, false
}
func (c *Clusters) GetServer(clusterId, serverId string) Server {
if cluster, ok := c.clusters.Load(clusterId); ok {
return cluster.(*Cluster).GetServer(serverId)
}
return Server{}
}
func (c *Clusters) Url(clusterId, serverId string) string {
if cluster, ok := c.clusters.Load(clusterId); ok {
return cluster.(*Cluster).Url(serverId)
}
return ""
}
func (c *Clusters) HfsId(url string) (clusterId, serverId string) {
c.clusters.Range(func(k, v interface{}) bool {
clusterId, serverId = v.(*Cluster).HfsId(url)
if serverId != "" {
return false
}
return true
})
return
}
type Cluster struct {
Id string
// serverm map[string]Server //serverId : Server
servers sync.Map //serverId : Server
}
func (c Cluster) ChooseServer() Server {
var r Server
var maxFreeSpace int
c.servers.Range(func(k, v interface{}) bool {
s := v.(Server)
if s.FreeSpace > maxFreeSpace && s.available {
maxFreeSpace = s.FreeSpace
r = s
}
return true
})
return r
}
func (c Cluster) Url(serverId string) string {
if v, ok := c.servers.Load(serverId); ok {
return v.(Server).Proxy
}
return ""
}
func (c Cluster) HfsId(url string) (clusterId, serverId string) {
c.servers.Range(func(k, v interface{}) bool {
s := v.(Server)
if s.Proxy == url {
clusterId = s.ClusterId
serverId = s.ServerId
return false
}
return true
})
return
}
func (c Cluster) GetServer(serverId string) Server {
if v, ok := c.servers.Load(serverId); ok {
return v.(Server)
}
return Server{}
}