private void NetworkStatusStateMachine()
{
bool flag = false;
switch (STATE_MACHINE_NETWORK)
{
case STATE_MACHINE_NETWORK_START:
//Console.WriteLine("IN STATE_MACHINE_NETWORK_START: BEGIN");
serversAlive.Clear();
for (int i = 0; i < Server.AllServers.Count; i++)
{
if (Server.AllServers[i].ID == Server.My_Identification.ID) //Avoid ping himself
{
continue;
}
try
{
ServerService obj = (ServerService)Activator.GetObject(typeof(ServerService), Server.AllServers[i].UID.AbsoluteUri + "MyRemoteObjectName");
Console.WriteLine("CHECK: {0}", Server.AllServers[i].UID.AbsoluteUri);
if (obj.isRoot() == true)
{
Root_id = i; //ID of the current root node
STATE_MACHINE_NETWORK = STATE_MACHINE_NETWORK_KEEP_ALIVE;
flag = true;
Console.WriteLine("ROOT is {0}", Server.AllServers[i].UID.AbsoluteUri);
object[] imageFromRoot = obj.getImage();
ServerService.SetTupleSpace(new TupleSpace((List <MyTuple>)imageFromRoot[0])); //Novo tuplespace criado
ServerService.SetCommunicationLayer((Queue)imageFromRoot[1], (List <Command>)imageFromRoot[2]);
//ServerService.SetTupleSpace( obj.getImage() ); //get the image of the root
Console.WriteLine("Imagem: ");
Console.WriteLine(ServerService.GetTupleSpaceRepresentation());
break;
}
else
{
serversAlive.Add(i); //Server ID
Console.WriteLine("ALIVE: {0}", Server.AllServers[i].UID.AbsoluteUri);
}
}
catch (Exception e)
{
//Console.WriteLine("IN STATE_MACHINE_NETWORK_START: EXCEPTION");
Console.WriteLine("DEAD: {0}", Server.AllServers[i].UID.AbsoluteUri);
//Console.WriteLine(e);
}
}
//Console.WriteLine("IN STATE_MACHINE_NETWORK_START: TEST_FLAG");
if (flag == false)
{
//Console.WriteLine("FLAG==FALSE: {0}", serversAlive.Count);
if (serversAlive.Count == 0) //check if anyone is ROOT
{
//ROOT
ServerService.setRoot(true);
STATE_MACHINE_NETWORK = STATE_MACHINE_NETWORK_IM_ROOT;
}
else
{
//Console.WriteLine("MY_IDENTIFICATION: {0}, {1}", Server.My_Identification.ID, (int)serversAlive[0]);
if ((Server.My_Identification.ID - 1) < (int)serversAlive[0])
{
//ROOT
ServerService.setRoot(true);
STATE_MACHINE_NETWORK = STATE_MACHINE_NETWORK_IM_ROOT;
}
}
}
break;
case STATE_MACHINE_NETWORK_KEEP_ALIVE:
//Console.WriteLine("IN STATE_MACHINE_NETWORK_KEEP_ALIVE");
//ping root
try
{
ServerService obj = (ServerService)Activator.GetObject(typeof(ServerService), Server.AllServers[Root_id].UID.AbsoluteUri + "MyRemoteObjectName");
obj.Ping();
//Console.WriteLine("ALIVE: {0}", Server.AllServers[i].UID.AbsoluteUri);
Thread.Sleep(rand.Next(1000)); //keepalive
}
catch (Exception e)
{
STATE_MACHINE_NETWORK = STATE_MACHINE_NETWORK_START;
//Console.WriteLine("IN STATE_MACHINE_NETWORK_KEEP_ALIVE: EXCEPTION");
//Console.WriteLine("GOING TO STATE_MACHINE_NETWORK_START");
//Console.WriteLine("DEAD: {0}", Server.AllServers[i].UID.AbsoluteUri);
//Console.WriteLine(e);
}
break;
case STATE_MACHINE_NETWORK_IM_ROOT:
Console.WriteLine("I'M THE ROOT SERVER");
STATE_MACHINE_NETWORK = STATE_MACHINE_NETWORK_END;
break;
case STATE_MACHINE_NETWORK_END:
break;
}
}
public static void CheckCommandsInQueue_thread()
{
while (true)
{
while (MustFreeze == true)
{
; //FREEZE ****************************
}
Thread.Sleep(50); //Min time to check commands
if (commLayer.GetQueueSize() > 0) //if there is commands
{
Command cmd = commLayer.RemoveFromCommandQueue();
MyTuple payload = (MyTuple)cmd.GetPayload();
Object tmp;
switch (cmd.GetCommand())
{
case "read":
tmp = ts.Read(payload);
MyTuple a = tmp as MyTuple;
Console.WriteLine("Imagem: ");
Console.WriteLine(ServerService.GetTupleSpaceRepresentation());
if (a == null) //object does not exist in the tuple space so we put in backlog
{
commLayer.InsertInBackLog(cmd);
Console.WriteLine("(ServerService) Comando no Backlog: " + cmd.GetCommand() + " " + cmd.GetPayload().ToString());
}
else
{
GiveBackResult(cmd.GetUriFromSender(), a);
}
break;
case "add":
ts.Add(payload);
//Console.WriteLine(" ================= UMA VEZ ================ ");
Console.WriteLine("Imagem: ");
Console.WriteLine(ServerService.GetTupleSpaceRepresentation());
GiveBackResult(cmd.GetUriFromSender(), null);
MyTuple a1;
//serach in the backlog
for (int i = 0; i < commLayer.GetBackLogSize(); ++i)
{
Command Command_tmp = commLayer.GetBackLogCommand(i);
if (Command_tmp.GetCommand().Equals("read"))
{
tmp = ts.Read((MyTuple)Command_tmp.GetPayload());
a1 = tmp as MyTuple;
if (a1 != null)
{
commLayer.RemoveFromBackLog(i);
i = -1;
Console.WriteLine("(ServerService) Comando Atendido e Removido do Backlog: " + cmd.GetCommand() + " " + cmd.GetPayload().ToString());
GiveBackResult(Command_tmp.GetUriFromSender(), a1);
}
}
else
{
if (Command_tmp.GetCommand().Equals("take"))
{
tmp = ts.Take((MyTuple)Command_tmp.GetPayload());
a1 = tmp as MyTuple;
if (a1 != null) //test if is a MyTuple
{
commLayer.RemoveFromBackLog(i);
i = -1;
GiveBackResult(Command_tmp.GetUriFromSender(), a1);
}
}
}
}
break;
case "take":
tmp = ts.Take(payload);
MyTuple a2 = tmp as MyTuple;
if (a2 == null) //object does not exist in the tuple space so we put in backlog
{
commLayer.InsertInBackLog(cmd);
Console.WriteLine("(ServerService) Comando no Backlog: " + cmd.GetCommand() + " " + cmd.GetPayload().ToString());
}
else
{
Console.WriteLine("Imagem: ");
Console.WriteLine(ServerService.GetTupleSpaceRepresentation());
GiveBackResult(cmd.GetUriFromSender(), a2);
}
break;
}
}
}
}
