public LookupTable()
{
lookupTable = new List<TableRow>();
//mudar este range para Int32.Max
//DefaultUIDRange = new UIDRange(0, 2048);
DefaultUIDRange = new UIDRange(int.MinValue, int.MaxValue);
}
public LookupTable()
{
lookupTable = new List <TableRow>();
//mudar este range para Int32.Max
//DefaultUIDRange = new UIDRange(0, 2048);
DefaultUIDRange = new UIDRange(int.MinValue, int.MaxValue);
}
public TableRow(ServerPair servers, UIDRange uidRange)
{
this.servers = servers;
this.uidRange = uidRange;
}
public bool AddServer(string URL)
{
//Console.WriteLine("AddServer called");
int index = getIndex();
String primary_url = URL;
String replica_url = String.Empty;
UIDRange newUIDRange = null;
if (lookupTable.Size() == 0)
{
//Primeiro servidor
newUIDRange = lookupTable.DefaultUIDRange;
}
else
{
TableRow temp = lookupTable.GetRow(index);
string oldPrimaryUrl = temp.GetServerPair().GetPrimary();
newUIDRange = temp.GetUIDRange().Split();
replica_url = serverReplicasTable.getReplica();
IServer oldPrimaryServer = (IServer)Activator.GetObject(typeof(IServer), oldPrimaryUrl);
ulong oldPrimaryTid = oldPrimaryServer.GetMaxTID();
oldPrimaryServer.AddTIDToPendingTable(primary_url, oldPrimaryTid, newUIDRange.GetRangeStart(), newUIDRange.GetRangeEnd());
IServer newPrimaryServer = (IServer)Activator.GetObject(typeof(IServer), primary_url);
newPrimaryServer.Init(oldPrimaryTid, replica_url);
//A tabela so temos o servidor 1 e entrou um novo srvidor
//como agora temos 2 servidores, o novo servidor pode
//ser replica do servidor 1
if (lookupTable.Size() == 1)
{
//Como era o unico servidor no sistema nao tinha replica
//adiciona-mos a replica agora que entrou um segundo
//servidor, e este o que entrou (primary_url) e a replica
//do anterior
//outlink
ServerPair sp = new ServerPair(temp.GetServerPair().GetPrimary(), primary_url);
lookupTable.ReplaceRow(index, new TableRow(sp, temp.GetUIDRange()));
//inlink
serverReplicasTable.addReplicaToServer(primary_url, temp.GetServerPair().GetPrimary());
oldPrimaryServer.SetReplica(primary_url);
}
}
//outlinks
ServerPair newServerPair = new ServerPair(primary_url, replica_url);
TableRow newTableRow = new TableRow(newServerPair, newUIDRange);
lookupTable.InsertRow(index, newTableRow);
//inlinks
//primary_url e adicionado como candidato para
//ser escolhido como replica de qualquer outro
//servidor
serverReplicasTable.addPrimary(primary_url);
//Se existir replica disponivel
//replica_url e responsavel por primary_url
if (!replica_url.Equals(String.Empty))
{
serverReplicasTable.addReplicaToServer(replica_url, primary_url);
}
return(true);
}
public TableRow(ServerPair servers, UIDRange uidRange)
{
this.servers = servers;
this.uidRange = uidRange;
}