/* 更新新加入节点的前继节点的后继和后继的后继，
* 以及新加入节点的后继节点的前继和前继的前继
*/
void Join::update_neighbour()
{
theApp.scout<<"++++update neighbour++++"<<endl;
int suc = peer->fingerTable.sucId;
string sucIp = peer->fingerTable.sucIP;
int sucPort = peer->fingerTable.sucPort;
int pre = peer->fingerTable.preId;
string preIp = peer->fingerTable.preIP;
int prePort = peer->fingerTable.prePort;
//更新前继节点的后继和后继的后继
stringstream ss1,ss2,ss3,ss4,ss5,ss6;
ss1<<peer->fingerTable.port;ss2<<sucPort;ss3<<prePort;
ss4<<peer->getId();ss5<<suc;ss6<<pre;
string cmd = "newSuc " + peer->fingerTable.ip + " " + ss1.str() + " " + ss4.str() + " " + ss5.str() + " " + sucIp + " " + ss2.str();
CSocket socket;
socket.Connect(preIp.c_str(),prePort);
socket.WriteLine(cmd);
socket.Close();
//更新后继节点的前继和前继的前继
cmd = "newPre " + peer->fingerTable.ip + " " + ss1.str() + " " + ss4.str() + " " + ss6.str() + " " + preIp + " " + ss3.str();
socket.Connect(sucIp.c_str(),sucPort);
socket.WriteLine(cmd);
socket.Close();
//更新前继的前继和后继的后继，他们只需要部分字段
suc_suc_pre_pre();
}
/* 更新新加入节点的前继的前继和后继的后继
* 通过向前继节点发出yourpre命令找出前继的前继，向后继节点发出yoursuc命令找出后继的后继
*/
void Join::init_suc_suc_pre_pre()
{
//后继的后继
string cmd = "yoursuc";
CSocket socket;
socket.Connect(peer->fingerTable.sucIP.c_str(),peer->fingerTable.sucPort);
socket.WriteLine(cmd);
string k = socket.ReadLine();
vector<string> s = Tool::Split(k," ");
peer->fingerTable.sucsucIP = s[0];
peer->fingerTable.sucsucPort = atoi(s[1].c_str());
peer->fingerTable.sucsucId = atoi(s[2].c_str());
socket.Close();
theApp.scout<<"@@@@@@@@@@@@@@@"<<endl;
//前继的前继
cmd = "yourpre";
socket.Connect(peer->fingerTable.preIP.c_str(),peer->fingerTable.prePort);
socket.WriteLine(cmd);
k = socket.ReadLine();
s = Tool::Split(k," ");
peer->fingerTable.prepreIP = s[0];
peer->fingerTable.preprePort = atoi(s[1].c_str());
peer->fingerTable.prepreId = atoi(s[2].c_str());
socket.Close();
}
/*更新前继的前继和后继的后继*/
void Join::suc_suc_pre_pre()
{
CSocket socket;
socket.Connect(peer->fingerTable.sucsucIP.c_str(),peer->fingerTable.sucsucPort);
string cmd = "set_your_pre_pre ";
stringstream ss,ss1;ss<<peer->getId();ss1<<peer->getPort();
cmd += (ss.str() + " " + peer->getLocalIp() + " " + ss1.str());
socket.WriteLine(cmd);
socket.Close();
socket.Connect(peer->fingerTable.prepreIP.c_str(),peer->fingerTable.preprePort);
cmd = "set_your_suc_suc ";
cmd += (ss.str() + " " + peer->getLocalIp() + " " + ss1.str());
socket.WriteLine(cmd);
socket.Close();
}
/*根据ip和port来寻找pre*/
string Join::findPre(string ip, int port)
{
CSocket socket;
socket.Connect(ip.c_str(),port);//连接服务器
string cmd = "yourpre";
socket.WriteLine(cmd);
//读取查询结果
string result = socket.ReadLine();
theApp.scout<<result<<endl;
return result;
}
/*在要连接的节点的后继节点链表中，找出离新节点最近且是新节点的前继的节点*/
string Join::findClosestPrecedingFinger(int id, string remoteIp, int remotePort)
{
stringstream ss;
ss<<id;
string cmd = "closestprecedingfinger " + ss.str();
CSocket socket;
socket.Connect(remoteIp.c_str(),remotePort);
socket.WriteLine(cmd);
//读取查询结果
string result = socket.ReadLine();
theApp.scout<<result<<endl;
return result;
}
/*
* 新节点加入拓扑时，需要把本属于它的key的hash从别的节点上转移过来
*/
void Join::transfer_keys()
{
theApp.scout<<"++++ In the transfer key++++"<<endl;
int sucId = peer->fingerTable.sucId;
string sucIp = peer->fingerTable.sucIP;
int sucPort = peer->fingerTable.sucPort;
stringstream ss1,ss2,ss3,ss4;ss1<<peer->fingerTable.port;ss2<<peer->getId();ss3<<peer->fingerTable.preId;
string cmd = "transfer_key " + peer->fingerTable.ip + " " + ss1.str() + " " + ss2.str() + " " + ss3.str();
if (sucId == peer->getId())
return;
CSocket socket;
socket.Connect(peer->fingerTable.sucIP.c_str(),peer->fingerTable.sucPort);
socket.WriteLine(cmd);
socket.Close();
}
/* 更新环上每一个节点的FingerTable中的后继列表
*/
void Join::update_others()
{
theApp.scout<<"++++update others++++"<<endl;
int localId = peer->getId();
string localIp = peer->fingerTable.ip;
int localport = peer->fingerTable.port;
int suc = peer->fingerTable.sucId;
string sucIp = peer->fingerTable.sucIP;
int sucPort = peer->fingerTable.sucPort;
stringstream ss,ss1;ss<<localport;ss1<<localId;
string cmd = "new_node " + localIp + " " + ss.str() + " " + ss1.str();
CSocket socket;
socket.Connect(sucIp.c_str(),sucPort);
socket.WriteLine(cmd);
socket.Close();
}