//begin se for a primeira vez que vai ao server x.
public void AddParticipant(ulong currentTid, int uid)
{
//foreach(KeyValuePair<int ,String> st in endpoints)
// Console.WriteLine("Tid: " + currentTid + "Value: " + st.Value + "Key:" + st.Key);
IServer server = servers[uid];
String url = endpoints[uid];
if (!participants.Contains(url))
{
server.BeginTransaction(currentTid, "");
participants.Add(url);
}
}
