public PatientGenerator()
{
_hospitals = MedWatchDAL.FindHospitals().ToList();
_diseases = MedWatchDAL.FindDiseases().ToList();
_freeDoctors = new Dictionary <int, IList <int> >();
_busyDoctors = new Dictionary <int, IList <int> >();
_patientsTakenInChargeByDoctor = new List <IPatientTakenInChargeByDoctor>();
_patientIds = new List <int>();
_stopWatch = new Stopwatch();
// Assign doctors to each hospital
foreach (var hospital in _hospitals)
{
var numberOfDoctors = hospital.AssignedDoctors;
var doctorsList = new List <int>(numberOfDoctors);
for (var i = 0; i < numberOfDoctors; ++i)
{
doctorsList.Add(GeneratorHelper.RandomNumericalValue(int.MaxValue));
}
_freeDoctors.Add(hospital.Id, doctorsList);
_busyDoctors.Add(hospital.Id, new List <int>());
}
// Creates the patient arrival sorted dictionary
_patientsArrival = new SortedDictionary <DiseasePriority, IList <IPatientArrival> >();
for (var diseasePriority = DiseasePriority.VeryHigh; diseasePriority < DiseasePriority.Invalid; ++diseasePriority)
{
_patientsArrival.Add(diseasePriority, new List <IPatientArrival>());
}
}
public IPatientLeaving GeneratePatientLeaving(long timeOutMilliSec)
{
if (_patientsTakenInChargeByDoctor.Count == 0)
{
return(null);
}
IPatientLeaving patientToLeave = null;
var patientLeaving = false;
_stopWatch.Restart();
while (!patientLeaving && (_stopWatch.ElapsedMilliseconds < timeOutMilliSec))
{
// Take a patient from the care list
var patientTakenInCharge =
_patientsTakenInChargeByDoctor[
GeneratorHelper.RandomNumericalValue(_patientsTakenInChargeByDoctor.Count)];
var elapsedTime = (DateTime.Now - patientTakenInCharge.TakenInChargeByDoctorTime).Milliseconds;
if (ConvertElapsedTimeFromMsTo(elapsedTime, patientTakenInCharge.Disease.TimeUnit) >= patientTakenInCharge.Disease.RequiredTime)
{
// Remove this doctor from the busy list
IList <int> busyDoctorsForThisHospital;
_busyDoctors.TryGetValue(patientTakenInCharge.HospitalId, out busyDoctorsForThisHospital);
busyDoctorsForThisHospital.Remove(patientTakenInCharge.DoctorId);
// Add this doctor to the free list
IList <int> freeDoctorsForThisHospital;
_freeDoctors.TryGetValue(patientTakenInCharge.HospitalId, out freeDoctorsForThisHospital);
freeDoctorsForThisHospital.Add(patientTakenInCharge.DoctorId);
// Keep the new generated patient in the leaving list
patientToLeave = new PatientLeaving(patientTakenInCharge.PatientId, patientTakenInCharge.HospitalId, DateTime.Now);
// Remove this patient from the care list
_patientsTakenInChargeByDoctor.Remove(patientTakenInCharge);
patientLeaving = true;
}
}
_stopWatch.Stop();
return(patientToLeave);
}
public IPatientArrival GeneratePatientArrival()
{
var patientId = GeneratorHelper.RandomNumericalValue(int.MaxValue);
while (_patientIds.Contains(patientId))
{
s_logger.Trace("Patient {0} already exist. Generated new one...", patientId);
patientId = GeneratorHelper.RandomNumericalValue(int.MaxValue);
}
var patientArrival = new PatientArrival(patientId,
_hospitals[GeneratorHelper.RandomNumericalValue(_hospitals.Count)].Id,
_diseases[GeneratorHelper.RandomNumericalValue(_diseases.Count)],
DateTime.Now);
// Keep the new generated patient in the arrival list
_patientsArrival[patientArrival.Disease.Priority].Add(patientArrival);
_patientIds.Add(patientId);
return(patientArrival);
}
public IPatientTakenInChargeByDoctor GeneratePatientTakenInChargeByDoctor(long timeOutMilliSec)
{
// Free doctor ?
if (_freeDoctors.All(doctor => doctor.Value.Count == 0))
{
return(null);
}
// Waiting patient ?
var diseasePriority = DiseasePriority.Invalid;
IList <IPatientArrival> patientList = null;
foreach (var patient in _patientsArrival.Where(patient => patient.Value.Count != 0))
{
diseasePriority = patient.Key;
patientList = _patientsArrival[diseasePriority];
break;
}
if ((patientList == null) || (patientList.Count == 0))
{
return(null);
}
var patientPriority = 0;
_stopWatch.Restart();
while (_stopWatch.ElapsedMilliseconds < timeOutMilliSec)
{
if (patientList.Count != 0)
{
// Take a patient from the waiting list
var patientArrival = patientList[patientPriority];
IList <int> freeDoctorsForThisHospital;
_freeDoctors.TryGetValue(patientArrival.HospitalId, out freeDoctorsForThisHospital);
if ((freeDoctorsForThisHospital != null) && (freeDoctorsForThisHospital.Count != 0))
{
// Choose one free doctor
var doctorId = freeDoctorsForThisHospital[GeneratorHelper.RandomNumericalValue(freeDoctorsForThisHospital.Count)];
// Add this doctor to the busy list
IList <int> busyDoctorsForThisHospital;
_busyDoctors.TryGetValue(patientArrival.HospitalId, out busyDoctorsForThisHospital);
busyDoctorsForThisHospital.Add(doctorId);
// Remove this doctor from the free list
freeDoctorsForThisHospital.Remove(doctorId);
// Keep the new generated patient in the care list
var patientTakenInChargeByDoctor = new PatientTakenInChargeByDoctor(patientArrival.PatientId,
patientArrival.HospitalId, DateTime.Now, doctorId, patientArrival.Disease);
_patientsTakenInChargeByDoctor.Add(patientTakenInChargeByDoctor);
// Remove this patient from the arrival list
patientList.Remove(patientArrival);
_patientIds.Remove(patientArrival.PatientId);
_stopWatch.Stop();
return(patientTakenInChargeByDoctor);
}
// Next patient in the same disease priority !
if (++patientPriority >= patientList.Count)
{
// Next disease priority !
if (++diseasePriority >= DiseasePriority.Invalid)
{
// Parsed all diseases and all patients
_stopWatch.Stop();
return(null);
}
patientList = _patientsArrival[diseasePriority];
patientPriority = 0;
}
}
}
_stopWatch.Stop();
return(null);
}
