public static bool Init()
{
_channel = new TcpChannel();
ChannelServices.RegisterChannel(_channel, false);
_master = (MasterInterface)Activator.GetObject(typeof(MasterInterface), "tcp://localhost:8087/Server");
_isInTransaction = false;
_references = new Dictionary <int, PADInt>();
_serverList = new List <string>();
return(true);
}
public TransactionalServer(int id, MasterInterface master, string url)
{
_id = id;
_padints = new Dictionary <int, PADInt>();
_transactions = new Dictionary <int, List <int> >();
_pendingRequests = new Dictionary <MethodInfo, List <Object> >();
_alive = new Timer(TIMEOUT);
_alive.Elapsed += IsAlive;
_alive.Enabled = true;
_master = master;
_url = url;
_prepared = false;
_status = true;
}
static void Main(string[] args)
{
RemotingConfiguration.Configure(@"../../App.config", true);
KeyValuePair <int, int> idAndPort;
System.Console.WriteLine("Bootstrapping...");
TcpChannel channel = new TcpChannel();
ChannelServices.RegisterChannel(channel, false);
System.Console.WriteLine("Registered Channel @random");
string address = System.IO.File.ReadAllText(@"../../../mServerLocation.dat");
MasterInterface mServer = (MasterInterface)Activator.GetObject(typeof(MasterInterface), address);
idAndPort = mServer.RegisterTransactionalServer(getIP());
System.Console.WriteLine("Registered at Master");
ChannelServices.UnregisterChannel(channel);
System.Console.WriteLine("Unbinding old port");
BinaryServerFormatterSinkProvider provider = new BinaryServerFormatterSinkProvider();
provider.TypeFilterLevel = TypeFilterLevel.Full;
IDictionary props = new Hashtable();
props["port"] = idAndPort.Value;
channel = new TcpChannel(props, null, provider);
ChannelServices.RegisterChannel(channel, false);
System.Console.WriteLine("Registered Channel @" + idAndPort.Value);
TransactionalServer ts = new TransactionalServer(idAndPort.Key, mServer, "tcp://" + getIP() + ":" + idAndPort.Value + "/Server");
RemotingServices.Marshal(ts, "Server", typeof(TransactionalServer));
System.Console.WriteLine("SERVER ON");
System.Console.WriteLine("Server: " + idAndPort.Key + " Port: " + idAndPort.Value + " IP: " + getIP());
System.Console.ReadLine();
}
public void CreateReservation(String description, List<UserView> userList, List<ReservationSlot> slotList, String creator, MasterInterface master)
{
if (!User.IsRegistered) {
User.Register();
}
Console.WriteLine("[Calling] CreateReservation");
Console.WriteLine("Printing slot list..");
foreach (ReservationSlot s in slotList) {
Console.WriteLine(s.ToString());
}
int ticket = master.RequestTicketNumber();
Reservation reservation = new Reservation(description, userList, slotList, creator, ticket);
//reservation has no participants. Medical dentist consult example
if (userList.Count == 0)
{
Console.WriteLine("No participants");
SinglePersonReservation(slotList, reservation);
return;
}
User.CreatedReservations.Add(reservation);
ChangeCalendarSlotStatus(slotList, true);
ReservationMessage reservationMessage = new ReservationMessage();
reservationMessage.senderName = User.Name;
reservationMessage.reservation = reservation;
reservationMessage.messageCounter = 1;
//send reservation
DisseminateInformation(reservationMessage, MessageTypeToDisseminate.SEND_RESERVATION,false);
List<UserView> usersThatNotAnswered = UsersThatNotAnsweredSendReservationCall(reservationMessage.reservation, false);
if (usersThatNotAnswered.Count == 0) {
Console.WriteLine("All users have answered");
}
else {
List<UserView> newList = RemoveUsersThatNotAnsweredFromTheUserList(reservationMessage.reservation.getUserList(), usersThatNotAnswered);
localThreadList.Clear();
threadResponses.Clear();
threadResponses2.Clear();
disseminationThreadList.Clear();
PrepareRetrySendReservation(usersThatNotAnswered, reservationMessage);
usersThatNotAnswered.Clear();
usersThatNotAnswered = UsersThatNotAnsweredSendReservationCall(reservationMessage.reservation, true);
Console.WriteLine("Not answered retry!");
foreach (UserView u in usersThatNotAnswered) {
Console.WriteLine("User " + u.getName() + " did not answered. Dead? Maybe...");
}
newList = RemoveUsersThatNotAnsweredFromTheUserList(reservationMessage.reservation.getUserList(), usersThatNotAnswered);
if (newList.Count == 0) {
DisseminateInformation(reservationMessage, MessageTypeToDisseminate.ABORT_RESERVATION, false);
localThreadList.Clear(); disseminationThreadList.Clear();
threadResponses.Clear(); threadResponses2.Clear();
return;
}
reservationMessage.reservation.SetUserList(newList);
}
localThreadList.Clear();
//changes the reservation slot status based on the answers received
//if the reservation if null them all slots are aborted -> Abort the reservation
Reservation temporaryReservation = null;
temporaryReservation = ChangeReservationSlotStatus(reservationMessage.reservation);
if (temporaryReservation == null) {
DisseminateInformation(reservationMessage, MessageTypeToDisseminate.ABORT_RESERVATION, false);
localThreadList.Clear();
threadResponses.Clear();
return;
}
reservationMessage.reservation = temporaryReservation;
reservationMessage.reservation = DeleteAbortedSlotsFromReservation(reservationMessage.reservation);
PrintReservation(reservationMessage.reservation); //debug
threadResponses.Clear();
//sends information to the users about the state of the reservation slots
DisseminateInformation(reservationMessage, MessageTypeToDisseminate.UPDATE_USERS_RESERVATION_INFO, false);
//remove the aborted slots from the slotList and start proposing possible slots for the event
localThreadList.Clear();
threadResponses.Clear();
//there are no avaible slots
if (reservationMessage.reservation.getSlotList().Count == 0) {
Console.WriteLine("No avaiable slots. Abort Reservation");
DisseminateInformation(reservationMessage, MessageTypeToDisseminate.ABORT_RESERVATION, false);
localThreadList.Clear();
threadResponses.Clear();
return;
}
bool wasAccepted = false;
int slotListSize = reservationMessage.reservation.getSlotList().Count;
ReservationMessage proposedSlotMessage = new ReservationMessage();
ReservationSlot commitSlot = null;
for (int i = 0; i <= slotListSize; i++) {
proposedSlotMessage = CreateMessageWithProposedSlot(reservationMessage.reservation, reservationMessage.reservation.getSlotList()[i]);
DisseminateInformation(proposedSlotMessage, MessageTypeToDisseminate.PROPOSE_SLOT, false);
//check if the proposed slot was accepted by all participants
wasAccepted = WasProposedSlotAccepted(proposedSlotMessage.proposedSlot);
if (wasAccepted) {
{
commitSlot = proposedSlotMessage.proposedSlot;
break;
}
}
localThreadList.Clear();
threadResponses.Clear();
}
Console.WriteLine("Was accepted? " + wasAccepted);
if (!wasAccepted) {
Console.WriteLine("No slot was accepted! Abort Reservation");
DisseminateInformation(reservationMessage, MessageTypeToDisseminate.ABORT_RESERVATION, false);
localThreadList.Clear();
threadResponses.Clear();
return;
}
Console.WriteLine("AcceptedSlot\n" + proposedSlotMessage.proposedSlot.ToString());
localThreadList.Clear();
threadResponses.Clear();
Console.WriteLine("Starting 2PC");
DisseminateInformation(reservationMessage, MessageTypeToDisseminate.TWO_PHASE_COMMIT, false);
usersThatNotAnswered.Clear();
usersThatNotAnswered = UsersThatNotAnsweredTwoPhaseCommit(reservationMessage.reservation,false);
if (usersThatNotAnswered.Count == 0)
{
Console.WriteLine("All users have answered");
}
else
{
List<UserView> newList = RemoveUsersThatNotAnsweredFromTheUserList(reservationMessage.reservation.getUserList(), usersThatNotAnswered);
PrepareRetryTwoPhaseCommit(usersThatNotAnswered, reservationMessage);
usersThatNotAnswered.Clear();
usersThatNotAnswered = UsersThatNotAnsweredTwoPhaseCommit(reservationMessage.reservation, true);
foreach (UserView u in usersThatNotAnswered)
{
Console.WriteLine("User " + u.getName() + " did not answered. Dead? Maybe...");
}
newList = RemoveUsersThatNotAnsweredFromTheUserList(reservationMessage.reservation.getUserList(), usersThatNotAnswered);
if (newList.Count == 0)
{
DisseminateInformation(reservationMessage, MessageTypeToDisseminate.ABORT_RESERVATION, false);
localThreadList.Clear(); disseminationThreadList.Clear();
threadResponses.Clear(); threadResponses2.Clear();
return;
}
reservationMessage.reservation.SetUserList(newList);
}
Console.WriteLine("Send Commit Reservation!");
ReservationMessage commitMessage = new ReservationMessage();
commitMessage.slotToCommit = commitSlot;
commitMessage.reservation = reservationMessage.reservation;
commitMessage.senderName = User.Name;
commitMessage.messageCounter = 1;
DisseminateInformation(commitMessage, MessageTypeToDisseminate.COMMIT_RESERVATION,false) ;
CommitReservation(commitMessage, 2000);
localThreadList.Clear();
threadResponses.Clear();
}
public TransactionalServer(int id, MasterInterface master, string url)
{
_id = id;
_padints = new Dictionary<int, PADInt>();
_transactions = new Dictionary<int, List<int>>();
_pendingRequests = new Dictionary<MethodInfo, List<Object>>();
_alive = new Timer(TIMEOUT);
_alive.Elapsed += IsAlive;
_alive.Enabled = true;
_master = master;
_url = url;
_prepared = false;
_status = true;
}
public static bool Init()
{
_channel = new TcpChannel();
ChannelServices.RegisterChannel(_channel, false);
_master = (MasterInterface)Activator.GetObject(typeof(MasterInterface), "tcp://localhost:8087/Server");
_isInTransaction = false;
_references = new Dictionary<int, PADInt>();
_serverList = new List<string>();
return true;
}
