public ReservationMessage AbortReservation(ReservationMessage message, int timeout)
{
Console.WriteLine("[Calling] AbortReservation");
Console.WriteLine("Cleaning Thread Lists");
lock (User.userLoger)
{
User.userLoger.IncrementNumberOfExchangedMessages("TwoPhaseCommit");
}
localThreadList.Clear();
disseminationThreadList.Clear();
threadResponses.Clear();
threadResponses2.Clear();
int reservationTicketNumber = message.reservation.getTicket();
List<ReservationSlot> reservationSlotList = message.reservation.getSlotList();
lock (User.ReservationPerSlot) {
foreach (ReservationSlot rslot in reservationSlotList) {
//remove each reservation from the slots it was assigned to
ReservationPerSlot reservationOnTheSlot = User.ReservationPerSlot[rslot.GetNumber()];
foreach (Reservation r in reservationOnTheSlot.GetReservations()) {
if (r.getTicket().Equals(reservationTicketNumber)) {
User.ReservationPerSlot[rslot.GetNumber()].RemoveReservation(message.reservation);
if (!User.ReservationPerSlot[rslot.GetNumber()].HasReservations()) {
Console.WriteLine("Slot " + rslot.GetNumber() + " does not have any reservation. Set state to Free");
lock (User.Calendar) {
User.Calendar[rslot.GetNumber()-1].setFree();
}
}
}
}
}
}
return message;
}
/// <summary>
/// Method the will be called by the threads the DisseminateReservationw will create.
/// This method will make a remote call to a specific user (proxy)
/// </summary>
/// <param name="proxy"></param>
/// <param name="reservation"></param>
///
private void CallSendReservation(object context)
{
Console.WriteLine("[Calling] CallSendReservation");
lock (User.userLoger)
{
User.userLoger.IncrementNumberOfExchangedMessages("CallSendReservation");
}
ThreadInfo threadInfo = context as ThreadInfo;
UserInterface proxy = threadInfo.proxy;
Reservation reservation = threadInfo.reservationMessage.reservation;
Console.WriteLine("Thread Number: " + threadInfo.threadNumber);
ReservationMessage response = null;
RemoteAsyncDelegate remoteDelegate = new RemoteAsyncDelegate(proxy.SendReservation);
String userName = threadInfo.userName;
int originalMessageCounter = threadInfo.reservationMessage.messageCounter;
String threadName = Thread.CurrentThread.Name;
JacobsonKarels timeoutAlgoritm = User.KnownUsersTimeout[userName];
timeoutAlgoritm.ModifiedUpdateTimeout();
int timeout = timeoutAlgoritm.GetTimeout();
//dissemination
if (threadName.Length == 3)
{
timeout = timeout / 2;
}
IAsyncResult result = remoteDelegate.BeginInvoke(threadInfo.reservationMessage, timeout, null, null);
//colocar timeout dinamico!
bool responseInTime = result.AsyncWaitHandle.WaitOne(timeout, true);
Console.WriteLine("Work time is over! Response in time? " + responseInTime);
//didn't get a response till timeout
if (responseInTime == false) {
Console.WriteLine("Timeout! Did not receive any answer!");
result.AsyncWaitHandle.Close();
response = new ReservationMessage();
//add an empty dicionary indicating that the user did not answered
response.AddSlotResponse(userName, new Dictionary<int, String>());
result.AsyncWaitHandle.Close();
}
else {
IncrementUserTrust(threadInfo.userName);
response = remoteDelegate.EndInvoke(result);
Console.WriteLine("Received: " + response);
result.AsyncWaitHandle.Close();
}
String currentThreadName = Thread.CurrentThread.Name;
char[] separator = { ' ' };
String[] splitedThreadName = currentThreadName.Split(separator);
String currentThreadNumber = splitedThreadName[0];
int currentTNumber = int.Parse(currentThreadNumber);
if (threadResponses.ContainsKey(currentTNumber)) {
threadResponses.Remove(currentTNumber);
}
//adds the response the response dicionary
//if is the retry
if (originalMessageCounter < 0) {
if (threadResponses2.ContainsKey(threadInfo.userName))
threadResponses2.Remove(threadInfo.userName);
threadResponses2.Add(threadInfo.userName, response);
}
else
threadResponses.Add(threadInfo.threadNumber, response);
}
private void CallProposeSlot(object context)
{
Console.WriteLine("[Calling] CallProposeSlot");
lock (User.userLoger)
{
User.userLoger.IncrementNumberOfExchangedMessages("CallProposeSlot");
}
ThreadInfo threadInfo = context as ThreadInfo;
UserInterface proxy = threadInfo.proxy;
Console.WriteLine("Thread Number: " + threadInfo.threadNumber);
ReservationMessage response = null;
ProposeSlotAsyncDelegate remoteDelegate = new ProposeSlotAsyncDelegate(proxy.ProposeSlot);
String userName = threadInfo.userName;
JacobsonKarels timeoutAlgoritm = User.KnownUsersTimeout[userName];
timeoutAlgoritm.ModifiedUpdateTimeout();
int timeout = timeoutAlgoritm.GetTimeout();
IAsyncResult result = remoteDelegate.BeginInvoke(threadInfo.reservationMessage.proposedSlot, threadInfo.reservationMessage, timeout, null, null);
bool responseInTime = result.AsyncWaitHandle.WaitOne(timeout, true);
Console.WriteLine("Work time is over! Response in time? " + responseInTime);
//didn't get a response till timeout
if (responseInTime == false) {
Console.WriteLine("Timeout! Did not receive any answer!");
result.AsyncWaitHandle.Close();
response = new ReservationMessage();
response.AddProposedSlotResponse(userName, "Timeout");
result.AsyncWaitHandle.Close();
}
else {
IncrementUserTrust(threadInfo.userName);
response = remoteDelegate.EndInvoke(result);
Console.WriteLine("User " + userName);
Console.WriteLine("Proposed slot answer: " + response.GetProposedSlotResponseByUser(userName));
result.AsyncWaitHandle.Close();
}
String currentThreadName = Thread.CurrentThread.Name;
char[] separator = { ' ' };
String[] splitedThreadName = currentThreadName.Split(separator);
String currentThreadNumber = splitedThreadName[0];
int currentTNumber = int.Parse(currentThreadNumber);
if (threadResponses.ContainsKey(currentTNumber)) {
threadResponses.Remove(currentTNumber);
}
threadResponses.Add(threadInfo.threadNumber, response);
return;
}
public ReservationMessage TwoPhaseCommit(ReservationMessage message, int timeout)
{
Console.WriteLine("[Calling] TwoPhaseCommit");
lock (User.userLoger)
{
User.userLoger.IncrementNumberOfExchangedMessages("TwoPhaseCommit");
}
ReservationMessage response = new ReservationMessage();
if (User.connected == false)
{
Console.WriteLine("I am not connect. Do not answer call");
Thread.Sleep(2 * timeout);
return response;
}
response.response2PC.Add(User.Name, "YES");
response.messageCounter += 1;
response.senderName = User.Name;
bool isDisseminating = IsDisseminating("2PC");
if (isDisseminating) return response;
int lenght = 2;
if (Thread.CurrentThread.Name == null)
{
Console.WriteLine("Thread Name is null. Original remote invocation thread");
}
else
{
String tName = Thread.CurrentThread.Name;
Console.WriteLine("Thread Name: " + tName);
char[] separator = { ' ' };
String[] words = tName.Split(separator);
lenght = words.Length;
}
//Calls the gossip dissemination protocol to send the message to other nodes
//Before sending the message we need to remove the user that sent the message
int userListSize = message.reservation.getUserList().Count;
double userListDouble = (double)userListSize;
double messageCounterDouble = (double)message.messageCounter;
if ((messageCounterDouble <= (userListDouble / 2)) && (userListSize != 1) && messageCounterDouble > 0)
{
if (Thread.CurrentThread.Name == null || lenght == 2)
{
Console.WriteLine("Disseminate!");
message.reservation = DeleteSenderFromUserList(message);
message.messageCounter *= 2;
DisseminateInformation(message, MessageTypeToDisseminate.TWO_PHASE_COMMIT, true);
//add received answers to the answer we will send
foreach (KeyValuePair<int, ReservationMessage> responses in threadResponses)
{
foreach (KeyValuePair<String, String> index in responses.Value.response2PC)
{
if(!response.response2PC.ContainsKey(index.Key))
response.response2PC.Add(index.Key,index.Value);
}
}
}
else Console.WriteLine("Thread has no permission to disseminate!");
}
return response;
}
public ReservationMessage SendReservation(ReservationMessage reservationMessage, int timeout)
{
Console.WriteLine("[Calling] SendReservation");
lock (User.userLoger)
{
User.userLoger.IncrementNumberOfExchangedMessages("SendReservation");
}
if (User.Calendar == null) {
Console.WriteLine("Calendar is null...initializing it");
CreateCalendar();
}
Console.WriteLine("Timeout to send message: " + timeout);
if (User.connected == false) {
Console.WriteLine("I am not connected. Do not answer call");
Thread.Sleep(2 * timeout);
return new ReservationMessage();
}
List<ReservationSlot> slotList = reservationMessage.reservation.getSlotList();
bool isDisseminating = IsDisseminating("SEND_RESERVATION");
if (isDisseminating)
{
Dictionary<int, String> sResponse = ChangeCalendarSlotStatus(slotList, false);
ReservationMessage a = new ReservationMessage();
a.reservation = reservationMessage.reservation;
a.messageCounter *= 2;
a.senderName = User.Name;
a.AddSlotResponse(User.Name, sResponse);
return a;
}
List<UserView> unknownUsers = GetUnkownUsersFromReservationUserList(reservationMessage.reservation.getUserList());
Console.WriteLine("Printing unknown users...");
foreach (UserView u in unknownUsers) {
Console.WriteLine("User: "******"Print received slots");
foreach (ReservationSlot s in slotList) {
Console.WriteLine(s.ToString());
if (!ExistsReservationInTheList(reservationMessage.reservation, s.GetNumber())) {
User.ReservationPerSlot[s.GetNumber()].addReservation(reservationMessage.reservation);
Console.WriteLine("Added Reservation: " + User.ReservationPerSlot[s.GetNumber()].GetReservations()[0].ToString());
}
else Console.WriteLine("Reservation was already in the slot list. Do not add it");
}
Dictionary<int, String> slotResponse = ChangeCalendarSlotStatus(slotList, false);
ReservationMessage answer = new ReservationMessage();
answer.reservation = reservationMessage.reservation;
answer.messageCounter *= 2;
answer.senderName = User.Name;
answer.AddSlotResponse(User.Name, slotResponse);
int lenght = 2;
if (Thread.CurrentThread.Name == null) {
Console.WriteLine("Thread Name is null. Original remote invocation thread");
}
else {
String tName = Thread.CurrentThread.Name;
Console.WriteLine("Thread Name: " + tName);
char[] separator = { ' ' };
String[] words = tName.Split(separator);
lenght = words.Length;
}
//Calls the gossip dissemination protocol to send the message to other nodes
//Before sending the message we need to remove the user that sent the message
int userListSize = reservationMessage.reservation.getUserList().Count;
double userListDouble = (double)userListSize;
double messageCounterDouble = (double)reservationMessage.messageCounter;
if ((messageCounterDouble <= (userListDouble / 2)) && (userListSize != 1) && messageCounterDouble > 0) {
if (Thread.CurrentThread.Name == null || lenght == 2) {
Console.WriteLine("Disseminate!");
reservationMessage.reservation = DeleteSenderFromUserList(reservationMessage);
reservationMessage.messageCounter *= 2;
PrintReservation(reservationMessage.reservation);
DisseminateInformation(reservationMessage, MessageTypeToDisseminate.SEND_RESERVATION, true);
//add received answers to the answer we will send
foreach (KeyValuePair<int, ReservationMessage> responses in threadResponses) {
Console.WriteLine("Thread " + responses.Key + " responses");
Console.WriteLine(responses.Value.PrintSlotResponses());
foreach (KeyValuePair<String, Dictionary<int, String>> rpsIndex in responses.Value.GetAllResponses()) {
answer.AddSlotResponse(rpsIndex.Key, rpsIndex.Value);
}
}
}
else Console.WriteLine("Thread has no permission to disseminate!");
}
Console.WriteLine("Answer to send");
Console.WriteLine(answer.ToString());
return answer;
}
public ReservationMessage ProposeSlot(ReservationSlot slot, ReservationMessage reservation, int timeout)
{
Console.WriteLine("[Calling] ProposeSlot");
lock (User.userLoger)
{
User.userLoger.IncrementNumberOfExchangedMessages("ProposeSlot");
}
Console.WriteLine("Timeout to send message: " + timeout);
if (User.connected == false) {
Console.WriteLine("I am not connected. Do not answer call");
Thread.Sleep(2 * timeout);
return new ReservationMessage();
}
bool isDisseminating = IsDisseminating("PROPOSE"); ;
List<Reservation> rsvList = User.ReservationPerSlot[slot.GetNumber()].GetReservations();
Console.WriteLine("Proposed slot: " + slot.GetNumber());
ReservationMessage response = new ReservationMessage();
response.senderName = User.Name;
if (rsvList.Count == 1) {
Console.WriteLine("Slot Found! Send Ack");
if (!response.GetAllProposedSlotResponses().ContainsKey(response.senderName))
response.AddProposedSlotResponse(User.Name, "Ack");
}
else {
bool isNak = false;
foreach (Reservation r in rsvList) {
if (r.areEqual(reservation.reservation))
continue;
//exists a reservation for this slot whose ticket number is lower
if (r.getTicket() < reservation.reservation.getTicket()) {
Console.WriteLine("A reservation with a lower ticket number was found! It has higher priority! Send Nak");
if (!response.GetAllProposedSlotResponses().ContainsKey(response.senderName)) {
response.AddProposedSlotResponse(response.senderName, "Nak");
isNak = true;
}
//return "Nak";
}
}
if (!isNak) {
if (!response.GetAllProposedSlotResponses().ContainsKey(response.senderName))
response.AddProposedSlotResponse(response.senderName, "Ack");
}
}
if (isDisseminating)
return response;
int lenght = 2;
if (Thread.CurrentThread.Name == null) {
Console.WriteLine("Thread Name is null. Original remote invocation thread");
}
else {
String tName = Thread.CurrentThread.Name;
Console.WriteLine("Thread Name: " + tName);
char[] separator = { ' ' };
String[] words = tName.Split(separator);
lenght = words.Length;
}
//Calls the gossip dissemination protocol to send the message to other nodes
//Before sending the message we need to remove the user that sent the message
int userListSize = reservation.reservation.getUserList().Count;
double userListDouble = (double)userListSize;
double messageCounterDouble = (double)reservation.messageCounter;
if ((messageCounterDouble <= (userListDouble / 2)) && (userListSize != 1)) {
if (Thread.CurrentThread.Name == null || lenght == 2) {
Console.WriteLine("Disseminate!");
reservation.reservation = DeleteSenderFromUserList(reservation);
reservation.messageCounter *= 2;
Console.WriteLine("Thread responses size: " + threadResponses.Count);
DisseminateInformation(reservation, MessageTypeToDisseminate.PROPOSE_SLOT, true);
//add received answers to the answer we will send
foreach (KeyValuePair<int, ReservationMessage> responses in threadResponses) {
Console.WriteLine("Thread " + responses.Key + " responses");
foreach (KeyValuePair<String, String> x in responses.Value.GetAllProposedSlotResponses()) {
}
Console.WriteLine(responses.Value.PrintSlotResponses());
//only adds the response if it does not exist
if (!response.GetAllProposedSlotResponses().ContainsKey(responses.Value.senderName))
response.AddProposedSlotResponse(responses.Value.senderName, responses.Value.GetProposedSlotResponseByUser(responses.Value.senderName));
}
}
else Console.WriteLine("Thread has no permission to disseminate!");
}
Console.WriteLine("Printing answer");
foreach (KeyValuePair<String, String> i in response.GetAllProposedSlotResponses()) {
Console.WriteLine("User " + i.Key + " response: " + i.Value);
}
return response;
}
/// <summary>
/// Changes the slots that are TB on the reservation to Booked on the Calendar
/// </summary>
/// <param name="reservation"></param>
/// <param name="timeout"></param>
/// <returns></returns>
public ReservationMessage ReservationSlotsUpdate(ReservationMessage reservation, int timeout)
{
if (User.Calendar == null) CreateCalendar();
Console.WriteLine("[Calling] Reservation Slots Update");
if (User.connected == false) {
Console.WriteLine("I am not connected. Do not answer call");
Thread.Sleep(2 * timeout);
return new ReservationMessage();
}
lock (User.Calendar) {
foreach (ReservationSlot slot in reservation.reservation.getSlotList()) {
UserCalendarSlot calendarSlot = User.Calendar[slot.GetNumber()-1];
if (slot.isTentativelyBooked() && !calendarSlot.isBooked() && !calendarSlot.isAssigned()) {
Console.WriteLine("Setting slot " + slot.GetNumber() + " to Booked");
User.Calendar[slot.GetNumber()-1].setBooked();
}
else
Console.WriteLine("Slot is not TB. Do not set calendar slot to Booked");
}
}
return reservation;
}
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();
}
private void PrepareRetryTwoPhaseCommit(List<UserView> listToSend, ReservationMessage reservation)
{
Console.WriteLine("[Calling] PrepareRetryTwoPhaseCommit");
List<UserInterface> usersProxy = new List<UserInterface>();
lock (User.userLoger)
{
User.userLoger.IncrementNumberOfExchangedMessages("TwoPhaseCommit");
}
foreach (UserView u in listToSend)
{
UserInterface proxy = User.GetUser(u.getIPAddress(), u.getPort(), u.getName());
usersProxy.Add(proxy);
}
Console.WriteLine("Creating Threads...");
int i = 0;
foreach (UserInterface ui in usersProxy)
{
ThreadInfo threadInfo = new ThreadInfo();
threadInfo.proxy = ui;
threadInfo.userName = ui.getName();
threadInfo.sendUserName = User.Name;
threadInfo.reservationMessage = reservation;
threadInfo.threadNumber = i++;
//send a message counter equal to the user list size to avoid further dissemination
threadInfo.reservationMessage.messageCounter = -1;
Thread t = new Thread(delegate()
{
CallTwoPhaseCommit(threadInfo);
});
t.Name = threadInfo.threadNumber + " 2PC";
localThreadList.Add(t);
t.Start();
}
Console.WriteLine("Waiting for threads to finish...");
foreach (Thread t in localThreadList)
{
t.Join();
}
Console.WriteLine("all threads have finished!");
}
private void DisseminateInformation(ReservationMessage reservationMessage, MessageTypeToDisseminate typeOfMessage, bool secondDissemination)
{
Console.WriteLine("[Calling] DisseminateReservation");
Console.WriteLine("Mode-> " + typeOfMessage.ToString());
Console.WriteLine("");
List<UserView> chosenUsers = null;
if (typeOfMessage.Equals(MessageTypeToDisseminate.UPDATE_USERS_RESERVATION_INFO) || typeOfMessage.Equals(MessageTypeToDisseminate.ABORT_RESERVATION) || typeOfMessage.Equals(MessageTypeToDisseminate.COMMIT_RESERVATION)) {
chosenUsers = reservationMessage.reservation.getUserList();
}
else
chosenUsers = ChooseUsers(reservationMessage.reservation,reservationMessage.messageCounter);
Console.WriteLine("Printing chosen users..");
foreach (UserView u in chosenUsers) {
Console.WriteLine(u.getName() + " port: " + u.getPort());
}
List<UserInterface> chosenUsersProxys = new List<UserInterface>();
foreach (UserView u in chosenUsers) {
UserInterface proxy = User.GetUser(u.getIPAddress(), u.getPort(), u.getName());
chosenUsersProxys.Add(proxy);
}
Console.WriteLine("Creating Threads...");
int i = 0;
foreach (UserInterface ui in chosenUsersProxys) {
ThreadInfo threadInfo = new ThreadInfo();
threadInfo.proxy = ui;
threadInfo.userName = ui.getName(); //caso
threadInfo.sendUserName = User.Name;
threadInfo.reservationMessage = reservationMessage;
threadInfo.threadNumber = i++;
if (secondDissemination) threadInfo.secondDissemination = true;
else threadInfo.secondDissemination = false;
Thread t;
if (typeOfMessage.Equals(MessageTypeToDisseminate.SEND_RESERVATION)) {
t = new Thread(delegate() {
CallSendReservation(threadInfo);
});
if (secondDissemination)
t.Name = threadInfo.threadNumber + " SEND_RESERVATION HAS_DISSEMINATED";
else
t.Name = threadInfo.threadNumber + " SEND_RESERVATION";
}
else if (typeOfMessage.Equals(MessageTypeToDisseminate.UPDATE_USERS_RESERVATION_INFO)) {
t = new Thread(delegate() {
CallUpdateUsersReservationInfo(threadInfo);
});
if (secondDissemination)
t.Name = threadInfo.threadNumber + " UPDATE HAS_DISSEMINATED";
else
t.Name = threadInfo.threadNumber + " UPDATE";
}
else if (typeOfMessage.Equals(MessageTypeToDisseminate.ABORT_RESERVATION)) {
t = new Thread(delegate() {
CallAbortReservation(threadInfo);
});
t.Name = threadInfo.threadNumber + " ABORT";
}
else if (typeOfMessage.Equals(MessageTypeToDisseminate.COMMIT_RESERVATION))
{
t = new Thread(delegate()
{
CallCommitReservation(threadInfo);
});
if (secondDissemination)
t.Name = threadInfo.threadNumber + " COMMIT HAS_DISSEMINATED";
else
t.Name = threadInfo.threadNumber + " COMMIT";
}
else if (typeOfMessage.Equals(MessageTypeToDisseminate.TWO_PHASE_COMMIT))
{
t = new Thread(delegate()
{
CallTwoPhaseCommit(threadInfo);
});
if (secondDissemination)
t.Name = threadInfo.threadNumber + " 2PC HAS_DISSEMINATED";
else
t.Name = threadInfo.threadNumber + " 2PC";
}
else
{
t = new Thread(delegate()
{
CallProposeSlot(threadInfo);
});
if (secondDissemination)
t.Name = threadInfo.threadNumber + " PROPOSE HAS_DISSEMINATED";
else
t.Name = threadInfo.threadNumber + " PROPOSE";
}
//needs to check if there is a thread with the same number on the list
//if there is...remove it and add the new one (t)
String currentThreadName = t.Name;
char[] separator = { ' ' };
String[] splitedThreadName = currentThreadName.Split(separator);
String currentThreadNumber = splitedThreadName[0];
int currentTNumber = int.Parse(currentThreadNumber);
Thread td = ThreadExistsInThreadList(currentTNumber);
//exists...
if (td != null) {
localThreadList.Remove(td);
}
if (secondDissemination.Equals(true)) {
disseminationThreadList.Add(t);
}
else
localThreadList.Add(t);
Console.WriteLine("Created thread " + t.Name);
t.Start();
}
Console.WriteLine("Waiting for threads to finish...");
if (secondDissemination.Equals(true)) {
foreach (Thread t in disseminationThreadList) {
t.Join();
}
}
else {
foreach (Thread t in localThreadList) {
t.Join();
}
}
Console.WriteLine("all threads have finished!");
}
/// <summary>
/// Deletes the sender from the reservation user's list. This must be done to proceed with the dissemination
/// </summary>
/// <param name="message"></param>
/// <returns></returns>
private Reservation DeleteSenderFromUserList(ReservationMessage message)
{
Reservation reservation = message.reservation;
UserView sender = null;
foreach (UserView user in User.KnownUsers.Keys.ToList()) {
if (user.getName().Equals(message.senderName)) {
sender = user;
break;
}
}
reservation.getUserList().Remove(sender);
return reservation;
}
public ReservationMessage CommitReservation(ReservationMessage message, int timeout)
{
Console.WriteLine("[Calling] CommitReservation");
lock (User.userLoger)
{
User.userLoger.IncrementNumberOfExchangedMessages("CommitReservation");
}
ReservationMessage response=null;
ReservationSlot slotToCommit = message.slotToCommit;
lock (User.Calendar)
{
User.Calendar[slotToCommit.GetNumber() - 1].SetAssigned();
}
return response;
}
private ReservationMessage CreateMessageWithProposedSlot(Reservation reservation, ReservationSlot proposedSlot)
{
Console.WriteLine("[Calling] CreateMessageWithProposedSlot\nSlot: " + proposedSlot.GetNumber());
ReservationMessage messageWithProposedSlot = new ReservationMessage();
messageWithProposedSlot.reservation = reservation;
messageWithProposedSlot.proposedSlot = proposedSlot;
return messageWithProposedSlot;
}
private void CallTwoPhaseCommit(object context)
{
ThreadInfo threadInfo = context as ThreadInfo;
UserInterface proxy = threadInfo.proxy;
Console.WriteLine("Thread Number: " + threadInfo.threadNumber);
lock (User.userLoger)
{
User.userLoger.IncrementNumberOfExchangedMessages("CallTwoPhaseCommit");
}
ReservationMessage response = new ReservationMessage();
RemoteAsyncDelegate remoteDelegate = new RemoteAsyncDelegate(proxy.TwoPhaseCommit);
String userName = threadInfo.userName;
JacobsonKarels timeoutAlgoritm = User.KnownUsersTimeout[userName];
timeoutAlgoritm.ModifiedUpdateTimeout();
int timeout = timeoutAlgoritm.GetTimeout();
IAsyncResult result = remoteDelegate.BeginInvoke(threadInfo.reservationMessage, timeout, null, null);
bool responseInTime = result.AsyncWaitHandle.WaitOne(timeout, true);
Console.WriteLine("Work time is over! Response in time? " + responseInTime);
//didn't get a response till timeout
if (responseInTime == false)
{
Console.WriteLine("Timeout! Did not receive any answer!");
if(!response.response2PC.ContainsKey(userName))
response.response2PC.Add(userName,"Timeout");;
result.AsyncWaitHandle.Close();
return;
}
if (!response.response2PC.ContainsKey(userName))
response.response2PC.Add(userName, "YES");
IncrementUserTrust(threadInfo.userName);
response = remoteDelegate.EndInvoke(result);
Console.WriteLine("Can Commit!");
result.AsyncWaitHandle.Close();
String currentThreadName = Thread.CurrentThread.Name;
char[] separator = { ' ' };
String[] splitedThreadName = currentThreadName.Split(separator);
String currentThreadNumber = splitedThreadName[0];
int currentTNumber = int.Parse(currentThreadNumber);
if (threadResponses.ContainsKey(currentTNumber))
{
threadResponses.Remove(currentTNumber);
}
int originalMessageCounter = threadInfo.reservationMessage.messageCounter;
//if is the retry
if (originalMessageCounter < 0)
{
if (threadResponses2.ContainsKey(threadInfo.userName))
threadResponses2.Remove(threadInfo.userName);
threadResponses2.Add(threadInfo.userName, response);
}
else
threadResponses.Add(threadInfo.threadNumber, response);
}
