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dynamicdiscovery.go
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dynamicdiscovery.go
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package cluster
import (
"errors"
"github.com/duanhf2012/origin/log"
"github.com/duanhf2012/origin/rpc"
"github.com/duanhf2012/origin/service"
)
const DynamicDiscoveryMasterName = "DiscoveryMaster"
const DynamicDiscoveryClientName = "DiscoveryClient"
const RegServiceDiscover = DynamicDiscoveryMasterName + ".RPC_RegServiceDiscover"
const SubServiceDiscover = DynamicDiscoveryClientName + ".RPC_SubServiceDiscover"
const AddSubServiceDiscover = DynamicDiscoveryMasterName + ".RPC_AddSubServiceDiscover"
type DynamicDiscoveryMaster struct {
service.Service
mapNodeInfo map[int32]struct{}
nodeInfo []*rpc.NodeInfo
}
type DynamicDiscoveryClient struct {
service.Service
funDelService FunDelNode
funSetService FunSetNodeInfo
localNodeId int
mapDiscovery map[int32]map[int32]struct{} //map[masterNodeId]map[nodeId]struct{}
}
var masterService DynamicDiscoveryMaster
var clientService DynamicDiscoveryClient
func getDynamicDiscovery() IServiceDiscovery {
return &clientService
}
func init() {
masterService.SetName(DynamicDiscoveryMasterName)
clientService.SetName(DynamicDiscoveryClientName)
}
func (ds *DynamicDiscoveryMaster) isRegNode(nodeId int32) bool {
_, ok := ds.mapNodeInfo[nodeId]
return ok
}
func (ds *DynamicDiscoveryMaster) addNodeInfo(nodeInfo *rpc.NodeInfo) {
if len(nodeInfo.PublicServiceList) == 0 {
return
}
_, ok := ds.mapNodeInfo[nodeInfo.NodeId]
if ok == true {
return
}
ds.mapNodeInfo[nodeInfo.NodeId] = struct{}{}
ds.nodeInfo = append(ds.nodeInfo, nodeInfo)
}
func (ds *DynamicDiscoveryMaster) OnInit() error {
ds.mapNodeInfo = make(map[int32]struct{}, 20)
ds.RegRpcListener(ds)
return nil
}
func (ds *DynamicDiscoveryMaster) OnStart() {
var nodeInfo rpc.NodeInfo
localNodeInfo := cluster.GetLocalNodeInfo()
if localNodeInfo.Private == true {
return
}
nodeInfo.NodeId = int32(localNodeInfo.NodeId)
nodeInfo.NodeName = localNodeInfo.NodeName
nodeInfo.ListenAddr = localNodeInfo.ListenAddr
nodeInfo.PublicServiceList = localNodeInfo.PublicServiceList
nodeInfo.MaxRpcParamLen = localNodeInfo.MaxRpcParamLen
ds.addNodeInfo(&nodeInfo)
}
func (ds *DynamicDiscoveryMaster) OnNodeConnected(nodeId int) {
//没注册过结点不通知
if ds.isRegNode(int32(nodeId)) == false {
return
}
//向它发布所有服务列表信息
var notifyDiscover rpc.SubscribeDiscoverNotify
notifyDiscover.IsFull = true
notifyDiscover.NodeInfo = ds.nodeInfo
notifyDiscover.MasterNodeId = int32(cluster.GetLocalNodeInfo().NodeId)
ds.GoNode(nodeId, SubServiceDiscover, ¬ifyDiscover)
}
func (ds *DynamicDiscoveryMaster) OnNodeDisconnect(nodeId int) {
if ds.isRegNode(int32(nodeId)) == false {
return
}
var notifyDiscover rpc.SubscribeDiscoverNotify
notifyDiscover.MasterNodeId = int32(cluster.GetLocalNodeInfo().NodeId)
notifyDiscover.DelNodeId = int32(nodeId)
//删除结点
cluster.DelNode(nodeId, true)
//无注册过的结点不广播,避免非当前Master网络中的连接断开时通知到本网络
ds.CastGo(SubServiceDiscover, ¬ifyDiscover)
}
func (ds *DynamicDiscoveryMaster) RpcCastGo(serviceMethod string, args interface{}) {
for nodeId, _ := range ds.mapNodeInfo {
ds.GoNode(int(nodeId), serviceMethod, args)
}
}
// 收到注册过来的结点
func (ds *DynamicDiscoveryMaster) RPC_RegServiceDiscover(req *rpc.ServiceDiscoverReq, res *rpc.Empty) error {
if req.NodeInfo == nil {
err := errors.New("RPC_RegServiceDiscover req is error.")
log.SError(err.Error())
return err
}
//广播给其他所有结点
var notifyDiscover rpc.SubscribeDiscoverNotify
notifyDiscover.MasterNodeId = int32(cluster.GetLocalNodeInfo().NodeId)
notifyDiscover.NodeInfo = append(notifyDiscover.NodeInfo, req.NodeInfo)
ds.RpcCastGo(SubServiceDiscover, ¬ifyDiscover)
//存入本地
ds.addNodeInfo(req.NodeInfo)
//初始化结点信息
var nodeInfo NodeInfo
nodeInfo.NodeId = int(req.NodeInfo.NodeId)
nodeInfo.NodeName = req.NodeInfo.NodeName
nodeInfo.Private = req.NodeInfo.Private
nodeInfo.ServiceList = req.NodeInfo.PublicServiceList
nodeInfo.PublicServiceList = req.NodeInfo.PublicServiceList
nodeInfo.ListenAddr = req.NodeInfo.ListenAddr
nodeInfo.MaxRpcParamLen = req.NodeInfo.MaxRpcParamLen
//主动删除已经存在的结点,确保先断开,再连接
cluster.serviceDiscoveryDelNode(nodeInfo.NodeId, true)
//加入到本地Cluster模块中,将连接该结点
cluster.serviceDiscoverySetNodeInfo(&nodeInfo)
return nil
}
func (dc *DynamicDiscoveryClient) OnInit() error {
dc.RegRpcListener(dc)
dc.mapDiscovery = map[int32]map[int32]struct{}{}
return nil
}
func (dc *DynamicDiscoveryClient) addMasterNode(masterNodeId int32, nodeId int32) {
_, ok := dc.mapDiscovery[masterNodeId]
if ok == false {
dc.mapDiscovery[masterNodeId] = map[int32]struct{}{}
}
dc.mapDiscovery[masterNodeId][nodeId] = struct{}{}
}
func (dc *DynamicDiscoveryClient) removeMasterNode(masterNodeId int32, nodeId int32) {
mapNodeId, ok := dc.mapDiscovery[masterNodeId]
if ok == false {
return
}
delete(mapNodeId, nodeId)
}
func (dc *DynamicDiscoveryClient) findNodeId(nodeId int32) bool {
for _, mapNodeId := range dc.mapDiscovery {
_, ok := mapNodeId[nodeId]
if ok == true {
return true
}
}
return false
}
func (dc *DynamicDiscoveryClient) OnStart() {
//2.添加并连接发现主结点
dc.addDiscoveryMaster()
}
func (dc *DynamicDiscoveryClient) addDiscoveryMaster() {
discoveryNodeList := cluster.GetDiscoveryNodeList()
for i := 0; i < len(discoveryNodeList); i++ {
if discoveryNodeList[i].NodeId == cluster.GetLocalNodeInfo().NodeId {
continue
}
dc.funSetService(&discoveryNodeList[i])
}
}
func (dc *DynamicDiscoveryClient) fullCompareDiffNode(masterNodeId int32, mapNodeInfo map[int32]*rpc.NodeInfo) []int32 {
if mapNodeInfo == nil {
return nil
}
diffNodeIdSlice := make([]int32, 0, len(mapNodeInfo))
mapNodeId := map[int32]struct{}{}
mapNodeId, ok := dc.mapDiscovery[masterNodeId]
if ok == false {
return nil
}
//本地任何Master都不存在的,放到diffNodeIdSlice
for nodeId, _ := range mapNodeId {
_, ok := mapNodeInfo[nodeId]
if ok == false {
diffNodeIdSlice = append(diffNodeIdSlice, nodeId)
}
}
return diffNodeIdSlice
}
//订阅发现的服务通知
func (dc *DynamicDiscoveryClient) RPC_SubServiceDiscover(req *rpc.SubscribeDiscoverNotify) error {
//整理当前master结点需要筛选的NeighborService
masterDiscoveryNodeInfo := cluster.GetMasterDiscoveryNodeInfo(int(req.MasterNodeId))
mapMasterDiscoveryService := map[string]struct{}{}
if masterDiscoveryNodeInfo != nil {
for i := 0; i < len(masterDiscoveryNodeInfo.NeighborService); i++ {
mapMasterDiscoveryService[masterDiscoveryNodeInfo.NeighborService[i]] = struct{}{}
}
}
mapNodeInfo := map[int32]*rpc.NodeInfo{}
for _, nodeInfo := range req.NodeInfo {
//不对本地结点或者不存在任何公开服务的结点
if int(nodeInfo.NodeId) == dc.localNodeId {
continue
}
if cluster.IsMasterDiscoveryNode() == false && len(nodeInfo.PublicServiceList) == 1 &&
nodeInfo.PublicServiceList[0] == DynamicDiscoveryClientName {
continue
}
//遍历所有的公开服务,并筛选之
for _, serviceName := range nodeInfo.PublicServiceList {
//只有存在配置时才做筛选
if len(mapMasterDiscoveryService) > 0 {
if _, ok := mapMasterDiscoveryService[serviceName]; ok == false {
continue
}
}
nInfo := mapNodeInfo[nodeInfo.NodeId]
if nInfo == nil {
nInfo = &rpc.NodeInfo{}
nInfo.NodeId = nodeInfo.NodeId
nInfo.NodeName = nodeInfo.NodeName
nInfo.ListenAddr = nodeInfo.ListenAddr
nInfo.MaxRpcParamLen = nodeInfo.MaxRpcParamLen
mapNodeInfo[nodeInfo.NodeId] = nInfo
}
nInfo.PublicServiceList = append(nInfo.PublicServiceList, serviceName)
}
}
//如果为完整同步,则找出差异的结点
var willDelNodeId []int32
//如果不是邻居结点,则做筛选
if req.IsFull == true {
diffNode := dc.fullCompareDiffNode(req.MasterNodeId, mapNodeInfo)
if len(diffNode) > 0 {
willDelNodeId = append(willDelNodeId, diffNode...)
}
}
//指定删除结点
if req.DelNodeId > 0 && req.DelNodeId != int32(dc.localNodeId) {
willDelNodeId = append(willDelNodeId, req.DelNodeId)
}
//删除不必要的结点
for _, nodeId := range willDelNodeId {
nodeInfo,_ := cluster.GetNodeInfo(int(nodeId))
cluster.TriggerDiscoveryEvent(false,int(nodeId),nodeInfo.PublicServiceList)
dc.removeMasterNode(req.MasterNodeId, int32(nodeId))
if dc.findNodeId(nodeId) == false {
dc.funDelService(int(nodeId), false)
}
}
//设置新结点
for _, nodeInfo := range mapNodeInfo {
dc.addMasterNode(req.MasterNodeId, nodeInfo.NodeId)
dc.setNodeInfo(nodeInfo)
if len(nodeInfo.PublicServiceList) == 0 {
continue
}
cluster.TriggerDiscoveryEvent(true,int(nodeInfo.NodeId),nodeInfo.PublicServiceList)
}
return nil
}
func (dc *DynamicDiscoveryClient) isDiscoverNode(nodeId int) bool {
for i := 0; i < len(cluster.masterDiscoveryNodeList); i++ {
if cluster.masterDiscoveryNodeList[i].NodeId == nodeId {
return true
}
}
return false
}
func (dc *DynamicDiscoveryClient) OnNodeConnected(nodeId int) {
nodeInfo := cluster.GetMasterDiscoveryNodeInfo(nodeId)
if nodeInfo == nil {
return
}
var req rpc.ServiceDiscoverReq
req.NodeInfo = &rpc.NodeInfo{}
req.NodeInfo.NodeId = int32(cluster.localNodeInfo.NodeId)
req.NodeInfo.NodeName = cluster.localNodeInfo.NodeName
req.NodeInfo.ListenAddr = cluster.localNodeInfo.ListenAddr
req.NodeInfo.MaxRpcParamLen = cluster.localNodeInfo.MaxRpcParamLen
//MasterDiscoveryNode配置中没有配置NeighborService,则同步当前结点所有服务
if len(nodeInfo.NeighborService) == 0 {
req.NodeInfo.PublicServiceList = cluster.localNodeInfo.PublicServiceList
} else {
req.NodeInfo.PublicServiceList = append(req.NodeInfo.PublicServiceList, DynamicDiscoveryClientName)
}
//向Master服务同步本Node服务信息
err := dc.AsyncCallNode(nodeId, RegServiceDiscover, &req, func(res *rpc.Empty, err error) {
if err != nil {
log.SError("call ", RegServiceDiscover, " is fail :", err.Error())
return
}
})
if err != nil {
log.SError("call ", RegServiceDiscover, " is fail :", err.Error())
}
}
func (dc *DynamicDiscoveryClient) setNodeInfo(nodeInfo *rpc.NodeInfo) {
if nodeInfo == nil || nodeInfo.Private == true || int(nodeInfo.NodeId) == dc.localNodeId {
return
}
//筛选关注的服务
localNodeInfo := cluster.GetLocalNodeInfo()
if len(localNodeInfo.DiscoveryService) > 0 {
var discoverServiceSlice = make([]string, 0, 24)
for _, pubService := range nodeInfo.PublicServiceList {
for _, discoverService := range localNodeInfo.DiscoveryService {
if pubService == discoverService {
discoverServiceSlice = append(discoverServiceSlice, pubService)
}
}
}
nodeInfo.PublicServiceList = discoverServiceSlice
}
if len(nodeInfo.PublicServiceList) == 0 {
return
}
var nInfo NodeInfo
nInfo.ServiceList = nodeInfo.PublicServiceList
nInfo.PublicServiceList = nodeInfo.PublicServiceList
nInfo.NodeId = int(nodeInfo.NodeId)
nInfo.NodeName = nodeInfo.NodeName
nInfo.ListenAddr = nodeInfo.ListenAddr
nInfo.MaxRpcParamLen = nodeInfo.MaxRpcParamLen
dc.funSetService(&nInfo)
}
func (dc *DynamicDiscoveryClient) OnNodeDisconnect(nodeId int) {
//将Discard结点清理
cluster.DiscardNode(nodeId)
}
func (dc *DynamicDiscoveryClient) InitDiscovery(localNodeId int, funDelNode FunDelNode, funSetNodeInfo FunSetNodeInfo) error {
dc.localNodeId = localNodeId
dc.funDelService = funDelNode
dc.funSetService = funSetNodeInfo
return nil
}
func (dc *DynamicDiscoveryClient) OnNodeStop() {
}