public bool CreateReservation(ReservationRequest reservation)
{
//initiate the reservation
//setup callbacks
//return;
return true;
}
//Verify calendar slots and create reservation states
private List<ReservationSlot> CreateReservationSlots(ReservationRequest req, int resID)
{
List<ReservationSlot> reservationSlots = new List<ReservationSlot>();
foreach (int slot in req.Slots)
{
ReservationSlotState state = ReservationSlotState.INITIATED;
CalendarSlot calendarSlot;
if (_calendar.TryGetValue(slot, out calendarSlot))
{
if (calendarSlot.State == CalendarSlotState.ASSIGNED)
{
state = ReservationSlotState.ABORTED;
}
}
else
{
calendarSlot = new CalendarSlot();
calendarSlot.SlotNum = slot;
calendarSlot.State = CalendarSlotState.FREE;
_calendar[slot] = calendarSlot;
Log.Debug(_userName, "Creating new calendar entry. Slot: " + calendarSlot.SlotNum + ". State: " + calendarSlot.State);
}
Monitor.Enter(calendarSlot);
if (calendarSlot.State == CalendarSlotState.FREE)
{
calendarSlot.State = CalendarSlotState.ACKNOWLEDGED;
}
Monitor.Exit(calendarSlot);
calendarSlot.WaitingBook.Add(resID);
ReservationSlot rs = new ReservationSlot(resID, slot, state);
reservationSlots.Add(rs);
}
return reservationSlots;
}
private Reservation CreateReservation(ReservationRequest req, int resID, string initiatorID, string initiatorIP, int initiatorPort)
{
Reservation thisRes = new Reservation();
thisRes.ReservationID = resID;
thisRes.Description = req.Description;
thisRes.Participants = req.Users;
thisRes.InitiatorID = initiatorID;
thisRes.InitiatorIP = initiatorIP;
thisRes.InitiatorPort = initiatorPort;
return thisRes;
}
/*
* SLOT MANAGER METHODS
*/
public bool StartReservation(ReservationRequest req)
{
//Updates request with sequence number
int resID = RetrieveSequenceNumber();
//Create and populate local reservation
Reservation res = CreateReservation(req, resID, _userName, Helper.GetIPAddress(), _port);
//Mark slots initial states
List<ReservationSlot> reservationSlots = CreateReservationSlots(req, resID);
//Update reservation request, removing aborted slots
foreach (ReservationSlot slot in new List<ReservationSlot>(reservationSlots))
{
if (slot.State == ReservationSlotState.ABORTED)
{
Log.Show(_userName, "Slot " + slot + " not available on initiator. Removing from reservation.");
//removing slot of original request, since it will be passed to participants
reservationSlots.Remove(slot);
req.Slots.Remove(slot.SlotID);
}
}
res.Slots = reservationSlots;
Log.Show(_userName, "Starting reservation " + res.ReservationID + ". With participants " + string.Join(",", res.Participants) + ". Slots: " + string.Join(",", res.Slots));
//If no slots are available, cancel reservation
if (res.Slots.Count == 0)
{
Log.Show(_userName, "No available slots on initiator, aborting reservation.");
return false;
}
//just the initiator is on the reservation
if (req.Users.Count == 1)
{
foreach (ReservationSlot slot in res.Slots)
{
Monitor.Enter(_calendar[slot.SlotID]);
try
{
CalendarSlot cSlot = _calendar[slot.SlotID];
if (slot.State != ReservationSlotState.ABORTED && !cSlot.Locked && cSlot.State != CalendarSlotState.ASSIGNED)
{
AssignCalendarSlot(res, slot, true);
return true;
}
else if (slot.State != ReservationSlotState.ABORTED)
{
AbortReservationSlot(slot, true);
}
}
finally
{
Monitor.Exit(_calendar[slot.SlotID]);
}
}
return false;
}
_clientMonitor.MonitorReservation(res);
//Add reservation to map of active reservations
_activeReservations[res.ReservationID] = res;
foreach (string participantID in res.Participants)
{
if (!participantID.Equals(_userName))
{
_msgDispatcher.SendMessage(MessageType.INIT_RESERVATION, resID, participantID, req, _userName, Helper.GetIPAddress(), _port);
}
}
return true;
}
/*
* BOOKING SERVICE PATICIPANT
*/
void IBookingService.InitReservation(ReservationRequest req, int resID, string initiatorID, string initiatorIP, int initiatorPort)
{
//Create and populate local reservation
Reservation res = CreateReservation(req, resID, _userName, initiatorIP, initiatorPort);
//Mark slots initial states
res.Slots = CreateReservationSlots(req, resID);
Log.Show(_userName, "Initializing reservation " + res.ReservationID + ". Initiator: " + res.InitiatorID + ". Slots: " + string.Join(", ", res.Slots));
bool abortedAll = true;
foreach (ReservationSlot slot in res.Slots)
{
if (slot.State != ReservationSlotState.ABORTED)
{
abortedAll = false;
break;
}
}
//If no slots are available, don't store reservation
if (abortedAll)
{
Log.Show(_userName, "No available slots on this participant. Reservation will not be persisted.");
}
else
{
//Add reservation to map of active reservations
_activeReservations[res.ReservationID] = res;
}
//Reply to initiator
String connectionString = "tcp://" + initiatorIP + ":" + initiatorPort + "/" + initiatorID + "/" + Common.Constants.BOOKING_SERVICE_NAME;
try
{
IBookingService initiator = (IBookingService)Activator.GetObject(
typeof(ILookupService),
connectionString);
res.InitiatorStub = initiator;
initiator.InitReservationReply(res.Slots, _userName);
}
catch (SocketException)
{
Log.Show(_userName, "ERROR: Initiator is not online.");
}
}
bool IClientFacade.CreateReservation(ReservationRequest reservation)
{
return _slotManager.StartReservation(reservation);
}
private void readEventFileAndDispatchEvents()
{
string line = string.Empty;
System.IO.StreamReader sr = new
System.IO.StreamReader(openFileDialog1.FileName);
while ((line = sr.ReadLine()) != null)
{
show(line);
string opcode = line.Split(' ')[0];
string username;
IClientFacade icf;
IServerFacade sf;
List<CalendarSlot> clientCalendar;
//TODO: fetch initiator from Users list
switch (opcode)
{
case "disconnect":
username = line.Split(' ')[1];
if (username.StartsWith("central"))
{
ServerMetadata sm = (ServerMetadata)pms.getServersList()[username];
IServerFacade isf = (IServerFacade)pms.getServerFacadeList()[username];
while (isf == null)
{
show("Trying to disconnect server: " + username);
isf = (IServerFacade)pms.getServerFacadeList()[username];
Thread.Sleep(100);
}
try
{
isf.Disconnect();
changeIconToDisconnected(username, null);
}
catch (Exception ioe)
{
MessageBox.Show(ioe.ToString());
}
}
else
{
icf = (IClientFacade)pms.getClientFacadeList()[username];
while (icf == null)
{
show("Trying to disconnect client: " + username);
icf = (IClientFacade)pms.getClientFacadeList()[username];
Thread.Sleep(1000);
}
try
{
icf.Disconnect();
}
catch (Exception ee)
{
show("Exception: " + ee.Message);
}
changeIconToDisconnected(username, null);
}
break;
case "connect":
username = line.Split(' ')[1].Trim();
string ip = line.Split(' ')[2].Split(':')[0].Trim();
int port = Convert.ToInt32(line.Split(' ')[2].Split(':')[1]);
icf = (IClientFacade)pms.getClientFacadeList()[username];
sf = (IServerFacade)pms.getServerFacadeList()[username];
if (icf != null) //means the client has already been created
{
show("Trying to reconnect to client: " + username);
icf.Connect();
changeIconToConnected(username, null);
}
else if (sf != null)
{
show("Reconnecting to server: " + username);
sf.Connect();
changeIconToConnected(username, null);
}
else //means a new process needs to be started
{
if (username.StartsWith("central"))
{
string path = server_dir;
ProcessStartInfo startInfo = new ProcessStartInfo();
startInfo.FileName = path + "Server.exe";
startInfo.Arguments = username + " " + port;
startInfo.WindowStyle = ProcessWindowStyle.Minimized;
Process process = new Process();
process.StartInfo = startInfo;
process.Start();
processes.Add(process);
//TODO: save the PIDS of all processes and kill them on exit
//if server is online, we move on to the next event. If not, we wait until the server is online
IServerFacade isf = (IServerFacade)pms.getServerFacadeList()[username];
while (isf == null)
{
Thread.Sleep(500);
isf = (IServerFacade)pms.getServerFacadeList()[username];
}
}
else //means its a client
{
string path = client_dir;
ProcessStartInfo startInfo = new ProcessStartInfo();
startInfo.FileName = path + "Client.exe";
startInfo.Arguments = username + " " + port;
startInfo.WindowStyle = ProcessWindowStyle.Minimized;
Process process = new Process();
process.StartInfo = startInfo;
process.Start();
processes.Add(process);
//if client is online, we move on to the next event. If not, we wait until the client is online
IClientFacade cf = (IClientFacade)pms.getClientFacadeList()[username];
while (cf == null)
{
Thread.Sleep(500);
cf = (IClientFacade)pms.getClientFacadeList()[username];
}
}
}
break;
case "readCalendar":
username = line.Split(' ')[1].Trim();
icf = (IClientFacade)pms.getClientFacadeList()[username];
try
{
clientCalendar = icf.ReadCalendar();
show("Calendar for " + username + ":");
foreach (CalendarSlot slot in clientCalendar)
{
show(slot);
}
}
catch (Exception ee)
{
show("Exception: " + ee.Message);
}
break;
case "reservation":
//reservation {GroupMeeting; user1, user2; 13, 25 }
string data = line.Split('{')[1].Split('}')[0].Trim();
string desc = data.Split(';')[0].Trim();
string initiator = data.Split(';')[1].Split(',')[0].Trim();
List<string> usersList = data.Split(';')[1].Trim().Split(',').Select(s => s.Trim()).ToList<string>();
List<int> slotsList = data.Split(';')[2].Trim().Split(',').Select(s => s.Trim()).ToList<string>().ConvertAll<int>(Convert.ToInt32);
ReservationRequest rr = new ReservationRequest();
rr.Description = desc;
rr.Users = usersList;
rr.Slots = slotsList;
icf = (IClientFacade)pms.getClientFacadeList()[initiator];
while (icf == null)
{
show("Trying to reconnect to initiator: " + initiator);
icf = (IClientFacade)pms.getClientFacadeList()[initiator];
Thread.Sleep(100);
}
try
{
icf.CreateReservation(rr);
}
catch (Exception e)
{
show("Error on create reservation: " + e.Message);
}
Thread.Sleep(1000);
break;
case "wait":
int seconds = Convert.ToInt32(line.Split(' ')[1].Trim());
show("Sleeping for " + seconds + " second(s)");
Thread.Sleep(seconds * 1000);
break;
case "shutdown":
show("Shutting down all processes in 2 seconds");
Thread.Sleep(2000);
//killing all clients
foreach (Process pp in processes)
{
string userName = pp.StartInfo.Arguments.Split(' ')[0].Trim();
if (!userName.StartsWith("central"))
{
((IClientFacade)pms.getClientFacadeList()[userName]).Disconnect();
pp.Kill();
removeNodeFromTreeView(userName, null);
show("Killed " + pp.StartInfo.Arguments);
}
}
//killing all servers
foreach (Process p in processes)
{
string userName = p.StartInfo.Arguments.Split(' ')[0].Trim();
if (userName.StartsWith("central"))
{
try
{
((IServerFacade)pms.getServerFacadeList()[userName]).Disconnect();
}
catch (Exception ee)
{
show(ee.Message);
}
p.Kill();
removeNodeFromTreeView(userName, null);
show("Killed " + p.StartInfo.Arguments);
}
}
//cleaning up
pms.cleanUp();
//RemotingServices.Unmarshal(objRef);
//objRef = null;
//pms = null;
processes.Clear();
//unregistering channels
UnregisterChannels();
show(" ");
show("----------------------SHUTDOWN COMPLETE--------------------");
show(" ");
break;
}
}
sr.Close();
}
private void createRes_Click(object sender, EventArgs e)
{
string initiator = usersBox.Text.Split(',')[0];
List<string> usersList = usersBox.Text.Split(',').ToList<string>();
List<int> slotsList = slotsBox.Text.Split(',').ToList().ConvertAll<int>(Convert.ToInt32);
string desc = descBox.Text;
ReservationRequest rr = new ReservationRequest();
rr.Description = desc;
rr.Users = usersList;
rr.Slots = slotsList;
IClientFacade icf = (IClientFacade)pms.getClientFacadeList()[initiator];
try
{
if (icf != null)
icf.CreateReservation(rr); //There is an exception unhandled here.
else
show("Unable to get Client Facade of Initiator");
}
catch (Exception ex)
{
Console.WriteLine("[PMS-EXCEPTION] " + ex.ToString());
}
}
