static void *handle_ping(void *arg) //master handle ping from server
{
Pthread_detach(pthread_self());
char *buf = (char *)arg;
pair <int, int> srv_name;
depacketize(buf, srv_name);
//printf("%s\n",seperator);
printf("Ping received: 127.0.0.1:%d\n",srv_name.second);
ms.update_time_sheet(srv_name);
//ms.display_time_sheet();
if (!ms.Server_exists(srv_name)) //if the server doesn't exist, it means that new server joined, start chain extension
{
printf("New server joined:127.0.0.1:%d, chain extension start\n",srv_name.second);
Server *s = new Server(srv_name);
ms.Addserver(s);
ms.client_notify(srv_name, true);
ms.server_notify(srv_name, true);
}
}
static void *probing(void *arg) //master probe the time_sheet in every 5 seconds
{
Pthread_detach(pthread_self());
while (1)
{
sleep(5);
printf("start probing\n");
time_t cur_time = time(NULL);
for(map<pair<int, int>, time_t >::iterator it = ms.Gettimesheet().begin(); it != ms.Gettimesheet().end(); ++it)
{
if (cur_time - (it->second) > 5) //if certain server's last ping from now is more than 5 seconds, it means the server fails, start notify client and server the failure
{
printf("%s\n",seperator);
printf("Server 127.0.0.1:%d FAILS\n",it->first.second);
ms.client_notify(it->first, false);
ms.server_notify(it->first, false);
it = ms.Gettimesheet().erase(it);
if (it == ms.Gettimesheet().end())
break;
}
}
}
}
