//处理查找节点的请求
//本节点定期查询已知节点是否在线，更新节点信息
func read() {
for {
nodeIdStr := <-nodeStore.OutFindNode
session, ok := engine.GetController().GetSession(nodeStore.SuperName)
//root节点刚启动就没有超级节点
if !ok {
continue
}
findNodeOne := &msg.FindNode{
NodeId: nodeStore.GetRootIdInfoString(),
IsProxy: false,
ProxyId: nodeStore.GetRootIdInfoString(),
WantId: nodeIdStr,
}
/*
当查找id等于自己的时候：
超级节点：查找邻居节点
普通节点：查找离自己最近的超级节点，查找邻居节点做备用超级节点
*/
if nodeIdStr == nodeStore.ParseId(nodeStore.GetRootIdInfoString()) {
//普通节点查找最近的超级节点
if !nodeStore.Root.IsSuper {
findNodeOne.NodeId = session.GetName()
findNodeOne.IsProxy = true
// findNodeOne.WantId = nodeIdStr
findNodeOne.IsSuper = nodeStore.Root.IsSuper
findNodeOne.Addr = nodeStore.Root.Addr
findNodeOne.TcpPort = nodeStore.Root.TcpPort
findNodeOne.UdpPort = nodeStore.Root.UdpPort
resultBytes, _ := json.Marshal(findNodeOne)
session.Send(msg.FindNodeNum, &resultBytes)
findNodeOne.WantId = "left"
findNodeBytes, _ := json.Marshal(findNodeOne)
err := session.Send(msg.FindNodeNum, &findNodeBytes)
if err != nil {
fmt.Println("manager发送数据出错：", err.Error())
}
findNodeOne.WantId = "right"
findNodeBytes, _ = json.Marshal(findNodeOne)
err = session.Send(msg.FindNodeNum, &findNodeBytes)
if err != nil {
fmt.Println("manager发送数据出错：", err.Error())
}
continue
}
//先发送左邻居节点查找请求
findNodeOne.WantId = "left"
id := nodeStore.GetLeftNode(*nodeStore.Root.IdInfo.GetBigIntId(), 1)
if id == nil {
continue
}
findNodeBytes, _ := json.Marshal(findNodeOne)
ok := false
var clientConn engine.Session
if nodeStore.Root.IsSuper {
clientConn, ok = engine.GetController().GetSession(string(id[0].IdInfo.Build()))
} else {
clientConn, ok = engine.GetController().GetSession(nodeStore.SuperName)
}
if !ok {
continue
}
err := clientConn.Send(msg.FindNodeNum, &findNodeBytes)
if err != nil {
fmt.Println("manager发送数据出错：", err.Error())
}
//发送右邻居节点查找请求
findNodeOne.WantId = "right"
id = nodeStore.GetRightNode(*nodeStore.Root.IdInfo.GetBigIntId(), 1)
if id == nil {
continue
}
findNodeBytes, _ = json.Marshal(findNodeOne)
if nodeStore.Root.IsSuper {
if clientConn, ok = engine.GetController().GetSession(string(id[0].IdInfo.Build())); !ok {
continue
}
}
err = clientConn.Send(msg.FindNodeNum, &findNodeBytes)
if err != nil {
fmt.Println("manager发送数据出错：", err.Error())
}
continue
}
//自己不是超级节点，就不需要保存逻辑节点
// if !nodeStore.Root.IsSuper {
// continue
// }
//--------------------------------------------
// 查找普通节点，只有超级节点才需要查找
//--------------------------------------------
//这里临时加上去
//去掉后有性能问题
findNodeBytes, _ := json.Marshal(findNodeOne)
remote := nodeStore.Get(nodeIdStr, false, "")
if remote == nil {
continue
}
session, _ = engine.GetController().GetSession(string(remote.IdInfo.Build()))
if session == nil {
continue
}
err := session.Send(msg.FindNodeNum, &findNodeBytes)
if err != nil {
fmt.Println("manager发送数据出错：", err.Error())
}
}
}
/*
查看本地保存的节点中，小于本节点id的所有节点
*/
func SeeLeftNode() {
nodes := nodeStore.GetLeftNode(*nodeStore.Root.IdInfo.GetBigIntId(), nodeStore.MaxRecentCount)
for _, id := range nodes {
fmt.Println(id.IdInfo.GetId())
}
}
//查找结点消息
func (this *NodeManager) FindNode(c engine.Controller, msg engine.GetPacket) {
findNode := new(FindNode)
json.Unmarshal(msg.Date, findNode)
findNodeIdInfo := new(nodeStore.IdInfo)
json.Unmarshal([]byte(findNode.NodeId), findNodeIdInfo)
// proto.Unmarshal(msg.Date, findNode)
// store := c.GetAttribute("nodeStore").(*nodeStore.NodeManager)
//--------------------------------------------
// 接收查找请求
//--------------------------------------------
if findNode.FindId != "" {
//普通节点收到自己发出的代理查找请求
if findNode.IsProxy && (findNode.ProxyId == nodeStore.GetRootIdInfoString()) {
//自己保存这个节点
this.saveNode(findNode, c)
// if nodeStore.SuperName != findNode.FindId {
// fmt.Println("自己获得的超级节点:", findNode.FindId)
// }
return
}
//是自己发出的非代理查找请求
if findNode.NodeId == nodeStore.GetRootIdInfoString() {
//是自己的代理节点发的请求
if findNode.IsProxy {
this.sendMsg(findNode.ProxyId, &msg.Date, c)
return
}
//不是代理查找，自己接收这个
// fmt.Println("找到一个节点：", findNode.GetFindId())
this.saveNode(findNode, c)
return
}
//不是自己发出的查找请求转发粗去
//查找除了刚发过来的节点并且包括自己，的临近结点
targetNode := nodeStore.Get(findNode.WantId, true, nodeStore.ParseId(msg.Name))
//查找的就是自己，但这个节点已经下线
// if hex.EncodeToString(targetNode.NodeId.Bytes()) == store.GetRootId() {
if targetNode.IdInfo.GetId() == nodeStore.ParseId(nodeStore.GetRootIdInfoString()) {
//这里要想个办法解决下
fmt.Println("想办法解决下这个问题")
fmt.Println("from:", nodeStore.ParseId(findNode.ProxyId), "\nwantId: ", findNode.WantId, "\ntargerNodeid: ", targetNode.IdInfo.GetId())
// fmt.Println(findNode)
return
}
//转发粗去
this.sendMsg(string(targetNode.IdInfo.Build()), &msg.Date, c)
return
}
//--------------------------------------------
// 发出查找请求
//--------------------------------------------
//--------------------------------------------
// 查找邻居节点
//--------------------------------------------
if findNode.WantId == "left" || findNode.WantId == "right" {
//需要查找的节点id
nodeIdInt, _ := new(big.Int).SetString(nodeStore.ParseId(findNode.ProxyId), nodeStore.IdStrBit)
var nodes []*nodeStore.Node
//查找左邻居节点
if findNode.WantId == "left" {
nodes = nodeStore.GetLeftNode(*nodeIdInt, nodeStore.MaxRecentCount)
if nodes == nil {
return
}
}
//查找右邻居节点
if findNode.WantId == "right" {
nodes = nodeStore.GetRightNode(*nodeIdInt, nodeStore.MaxRecentCount)
if nodes == nil {
return
}
}
//把找到的邻居节点返回给查找者
for _, nodeOne := range nodes {
rspMsg := FindNode{
NodeId: findNode.NodeId,
WantId: findNode.WantId,
FindId: string(nodeOne.IdInfo.Build()),
IsProxy: findNode.IsProxy,
ProxyId: findNode.ProxyId,
Addr: nodeOne.Addr,
IsSuper: nodeOne.IsSuper,
TcpPort: int32(nodeOne.TcpPort),
UdpPort: int32(nodeOne.UdpPort),
}
resultBytes, _ := json.Marshal(&rspMsg)
this.sendMsg(msg.Name, &resultBytes, c)
}
return
}
//自己的代理节点发过来的代理查找请求
if findNode.IsProxy && (msg.Name == findNode.ProxyId) {
if findNode.WantId == "left" || findNode.WantId == "right" {
fmt.Println(findNode.WantId)
}
//超级节点刚上线
if findNode.IsSuper {
newNode := FindNode{
NodeId: findNode.ProxyId,
WantId: findNode.WantId,
FindId: findNode.ProxyId,
IsProxy: findNode.IsProxy,
ProxyId: findNode.ProxyId,
Addr: findNode.Addr,
IsSuper: findNode.IsSuper,
TcpPort: findNode.TcpPort,
UdpPort: findNode.UdpPort,
}
this.saveNode(&newNode, c)
}
//查找超级节点并且包括自己，的临近结点
targetNode := nodeStore.Get(findNode.WantId, true, nodeStore.ParseId(findNode.ProxyId))
//要查找的节点就是自己，则发送给自己的代理节点
if targetNode.IdInfo.GetId() == nodeStore.ParseId(nodeStore.GetRootIdInfoString()) {
// fmt.Println("自己的代理节点发出的查找请求查找到临近结点：", targetNode.NodeId.String())
rspMsg := FindNode{
NodeId: findNode.NodeId,
WantId: findNode.WantId,
FindId: nodeStore.GetRootIdInfoString(),
IsProxy: findNode.IsProxy,
ProxyId: findNode.ProxyId,
Addr: nodeStore.Root.Addr,
IsSuper: nodeStore.Root.IsSuper,
TcpPort: nodeStore.Root.TcpPort,
UdpPort: nodeStore.Root.UdpPort,
}
resultBytes, _ := json.Marshal(&rspMsg)
this.sendMsg(msg.Name, &resultBytes, c)
//是自己的代理节点
if !findNode.IsSuper {
if _, ok := c.GetSession(findNode.ProxyId); ok {
fmt.Println("添加一个代理节点")
findNodeIdInfo := new(nodeStore.IdInfo)
json.Unmarshal([]byte(findNode.ProxyId), findNodeIdInfo)
newNode := &nodeStore.Node{
IdInfo: *findNodeIdInfo,
IsSuper: findNode.IsSuper,
Addr: findNode.Addr,
TcpPort: findNode.TcpPort,
UdpPort: findNode.UdpPort,
}
nodeStore.AddProxyNode(newNode)
}
}
return
}
//转发代理查找请求
rspMsg := FindNode{
// NodeId: nodeStore.GetRootIdInfoString(),
NodeId: findNode.NodeId,
WantId: findNode.WantId,
IsProxy: findNode.IsProxy,
ProxyId: findNode.ProxyId,
}
resultBytes, _ := json.Marshal(&rspMsg)
this.sendMsg(string(targetNode.IdInfo.Build()), &resultBytes, c)
return
}
//查找除了客户端节点并且包括自己的临近结点
targetNode := nodeStore.Get(findNode.WantId, true, nodeStore.ParseId(msg.Name))
//要查找的节点就是自己
if targetNode.IdInfo.GetId() == nodeStore.ParseId(nodeStore.GetRootIdInfoString()) {
rspMsg := FindNode{
NodeId: findNode.NodeId,
WantId: findNode.WantId,
FindId: nodeStore.GetRootIdInfoString(),
IsProxy: findNode.IsProxy,
ProxyId: findNode.ProxyId,
Addr: nodeStore.Root.Addr,
IsSuper: nodeStore.Root.IsSuper,
TcpPort: nodeStore.Root.TcpPort,
UdpPort: nodeStore.Root.UdpPort,
}
resultBytes, _ := json.Marshal(&rspMsg)
this.sendMsg(msg.Name, &resultBytes, c)
return
}
//要找的不是自己，则转发出去
this.sendMsg(string(targetNode.IdInfo.Build()), &msg.Date, c)
}