/// <summary>
/// To call before starting a new occurence of the same simulation.
/// </summary>
public virtual void PrepareForNextOccurrence()
{
this.remainingDuration = this.Duration.XValue;
this.lastProcessTime = this.simulationTimeArrives;
//if (this.simulationCrewMembersAssigned == null) this.simulationCrewMembersAssigned = new List<CrewMember>();
//else this.crewMembersAssigned.Clear(); //TODO: Find out if we want to clear the list at this point
}
/// <summary>
/// Generates the concrete value based on its statistical distribution and a random number,
/// and assign it to <see cref="XValue"/>.
/// </summary>
/// <param name="rand">A random number generator.</param>
/// <returns>The concrete value generated, ≥ 0</returns>
public SimulationTime NextValue(Random rand)
{
switch (this.probabilityDistribution)
{
case ProbabilityDistribution.Exponential:
this.xValue = -Math.Log(1.0 - rand.NextDouble()) * mode; //mode == mean == 1/lambda (where lamda is the rate parameter)
return(this.xValue);
case ProbabilityDistribution.Triangular:
//TODO:Optimise (e.g. helper variables) //Try to implement with integers?
var u = rand.NextDouble();
var minS = this.min.TotalSeconds;
var modeS = this.mode.TotalSeconds;
var maxS = this.max.TotalSeconds;
if (u <= ((modeS - minS) / (maxS - minS)))
{
this.xValue = new SimulationTime(TimeUnit.Seconds, minS + Math.Sqrt((u * (maxS - minS) * (modeS - minS))));
}
else
{
this.xValue = new SimulationTime(TimeUnit.Seconds, maxS - Math.Sqrt(((1.0 - u) * (maxS - minS) * (maxS - modeS))));
}
this.xValue.Unit = this.Unit;
return(this.xValue);
case ProbabilityDistribution.Constant: //Nothing to do
default:
return(this.xValue);
}
}
/// <summary>
/// Reset to the default parameters of the parent Task, except for readonly attributes (e.g. this.id) and lists.
/// </summary>
public void Reset()
{
if (this.refTask == null)
{
this.name = "!Invalid";
this.TaskType = (int)default(StandardTaskType);
this.taskInterruptionPolicy = TaskInterruptionPolicies.Undefined;
this.phaseInterruptionPolicy = PhaseInterruptionPolicies.Undefined;
this.scenarioInterruptionPolicy = ScenarioInterruptionPolicies.Undefined;
return;
}
this.InternalId = refTask.InternalId;
this.name = this.refTask.name;
this.TaskType = this.refTask.taskType;
//this.systemTask = this.refTask.systemTask;
this.autoExpandToAllCrewmen = this.refTask.autoExpandToAllCrewmen;
this.RelativeDate = this.refTask.relativeDate;
this.DateOffset = this.refTask.DateOffset;
this.StartDate = this.refTask.StartDate;
this.relativeTime = this.refTask.relativeTime;
this.DailyHourStart = this.refTask.DailyHourStart;
this.DailyHourEnd = this.refTask.DailyHourEnd;
this.onHolidays = this.refTask.onHolidays;
this.Duration = this.refTask.Duration;
this.taskInterruptionPolicy = this.refTask.taskInterruptionPolicy;
this.phaseInterruptionPolicy = this.refTask.phaseInterruptionPolicy;
this.scenarioInterruptionPolicy = this.refTask.scenarioInterruptionPolicy;
this.interruptionErrorPolicy = this.refTask.interruptionErrorPolicy;
this.priority = this.refTask.priority;
this.numberOfCrewmenNeeded = this.refTask.numberOfCrewmenNeeded;
this.Rotation = this.refTask.Rotation;
this.description = this.refTask.description;
this.duplicatesPolicy = this.refTask.duplicatesPolicy;
}
/// <summary>
/// Check the different time constraints to tell when the task will next be allowed to be resumed.
/// </summary>
/// <param name="eventTime">A simulation time</param>
/// <param name="allowCurrentTime">Gives the possibility to use the given simulation time</param>
/// <returns>A simulation time in the relative future when the task is allowed to run</returns>
public SimulationTime NextPossibleResume(SimulationTime eventTime, bool allowCurrentTime = true)
{
var workStart = eventTime.NextDayTime(this.DailyHourStart, allowCurrentTime);
var workEnd = eventTime.NextDayTime(this.DailyHourEnd, allowCurrentTime);
if ((workStart < workEnd) || (eventTime >= workEnd))
{
eventTime = workStart; //TimeWindow, next day
}
else if (!allowCurrentTime)
{
eventTime = eventTime.NextUp();
}
if ((!this.onHolidays) && eventTime.IsSunday)
{
eventTime = eventTime.NextWeekTime(SimulationTime.OneDay, allowCurrentTime: false); //Next monday
workStart = eventTime.NextDayTime(this.DailyHourStart);
workEnd = eventTime.NextDayTime(this.DailyHourEnd);
if ((workStart < workEnd) || (eventTime >= workEnd))
{
eventTime = workStart; //TimeWindow, next day
}
}
return(eventTime);
}
/// <summary>
/// Call <see cref="DismissTask"/> for all tasks currently assigned to the crewman.
/// </summary>
/// <param name="time">Current simulation time</param>
/// <param name="phase">Current phase</param>
public void DismissAllTasks(SimulationTime time, Phase phase)
{
while (this.tasksAssigned.Count > 0)
{
DismissTask(time, phase, this.tasksAssigned[0]);
}
}
/// <summary>
/// Assign the crewman to a running task.
/// This starts by calling <see cref="RefreshStatus"/>, and increase <see cref="CurrentLoad"/>.
/// </summary>
/// <param name="time">Current simulation time</param>
/// <param name="phase">Current phase</param>
/// <param name="task">New task</param>
public virtual void AssignTask(SimulationTime time, Phase phase, SimulationTask task)
{
RefreshStatus(time);
this.tasksAssigned.Add(task);
if (task.IsWork)
{
currentLoad++;
}
}
/// <summary>
/// To call when the time since last update needs to be discarded.
/// Used for instance when a task has to start a bit before than current time and be shortened accordingly.
/// </summary>
/// <param name="currentTime">Current simulation time.</param>
public virtual void DiscardUntilNow(SimulationTime currentTime)
{
var duration = currentTime - this.lastProcessTime;
if (duration.Positive)
{
this.remainingDuration -= duration;
}
this.lastProcessTime = currentTime;
}
/// <summary>
/// Remove a running or completed task from the crewman.
/// This starts by calling <see cref="RefreshStatus"/>, and decrease <see cref="CurrentLoad"/>.
/// </summary>
/// <param name="time">Current simulation time</param>
/// <param name="phase">Current phase</param>
/// <param name="task">Task dismissed</param>
public virtual void DismissTask(SimulationTime time, Phase phase, SimulationTask task)
{
RefreshStatus(time);
this.tasksAssigned.Remove(task);
if (task.IsWork)
{
this.currentLoad--;
Debug.Assert(currentLoad >= 0, "Current load must be positive!");
if (this.currentLoad < 0)
{
this.currentLoad = 0;
}
}
}
/// <summary>
/// To call when the task has been active until now, in order to update the statistics of the task (e.g. remaining duration).
/// Does not call <see cref="Crewman.RefreshStatus"/> by default.
/// </summary>
/// <param name="currentTime">Current simulation time.</param>
/// <param name="phase">Phase during which the process occurs.</param>
/// <returns>A positive duration if the task was processed, <see cref="SimulationTime.Zero"/> otherwise.</returns>
public virtual SimulationTime ProcessUntilNow(SimulationTime currentTime, Phase phase)
{
var previousProcessTime = this.lastProcessTime;
this.lastProcessTime = currentTime;
if (this.simulationCrewmenAssigned.Count >= this.numberOfCrewmenNeeded)
{
var duration = currentTime - previousProcessTime;
if (duration.Positive)
{
this.remainingDuration -= duration;
Debug.Assert((this.taskType == (int)StandardTaskType.InternalWait) || Allowed(phase), "A task must not run in phases where it is not allowed!");
Debug.Assert(duration <= currentTime - phase.simulationTimeBegin, "A task cannot last longer than its phase!");
return(duration);
}
}
return(SimulationTime.Zero);
}
/// <summary>
/// Refresh all status parameters of the crewman such as cumulated work time.
/// This is called automatically by <see cref="AssignTask"/>, <see cref="DismissTask"/>,
/// at at the end of each phase transition by <see cref="Simulator"/>.
/// Furthermore, this should be called by implementations of <see cref="SimManning.Domain.DomainDispatcher"/>
/// before deciding which crewmen should take a job.
/// </summary>
/// <remarks>Implementations of domains should override this function to include their domain-specific parameters</remarks>
/// <param name="time">Current simulation time</param>
/// <returns>true if a refresh was needed, false otherwise</returns>
public virtual bool RefreshStatus(SimulationTime time)
{ //In the base class, we only have cumulatedWorkTime
Debug.Assert(this.lastRefreshTime <= time, "Simulation cannot go back in time!");
if (time == this.lastRefreshTime)
{
return(false);
}
//Debug.WriteLine("?\t{0}\tRefreshStatus\t{1}", time, this);
if (this.currentLoad > 0)
{ //The crewman is currently working
var offset = time - this.lastRefreshTime;
if (offset.Positive)
{
this.cumulatedWorkTime += offset;
}
}
this.lastRefreshTime = time;
return(true);
}
public void Validate()
{
if ((this.Unit == TimeUnit.Undefined) || (this.mode < SimulationTime.Zero))
{
this.mode = SimulationTime.Zero;
}
if (this.min > this.mode)
{
this.min = this.mode;
}
else if (this.min < SimulationTime.Zero)
{
this.min = SimulationTime.Zero;
}
if ((this.max != SimulationTime.Zero) && (this.max < this.mode))
{
this.max = this.mode;
}
}
public TimeDistribution(TimeUnit timeUnit, SimulationTime min, SimulationTime mode, SimulationTime max)
{
this.min = min;
this.mode = mode;
this.max = max;
if (this.mode <= SimulationTime.Zero)
{
this.probabilityDistribution = ProbabilityDistribution.Constant;
this.min = this.max = this.mode = SimulationTime.Zero;
}
else if (this.max <= SimulationTime.Zero)
{
this.probabilityDistribution = ProbabilityDistribution.Exponential;
this.min = this.max = SimulationTime.Zero;
}
else
{
if (this.min > this.mode)
{
this.min = this.mode;
}
else if (this.min < SimulationTime.Zero)
{
this.min = SimulationTime.Zero;
}
if (this.max < this.mode)
{
this.max = this.mode;
}
if ((this.min < this.mode) || (this.mode < this.max))
{
this.probabilityDistribution = ProbabilityDistribution.Triangular;
}
else
{
this.probabilityDistribution = ProbabilityDistribution.Constant;
}
}
this.xValue = this.mode;
this.Unit = timeUnit;
}
public TimeDistribution(TimeUnit timeUnit, SimulationTime constantValue) :
this(timeUnit, constantValue, constantValue, constantValue)
{
}
public TimeDistribution(SimulationTime min, SimulationTime mode, SimulationTime max) :
this(mode.Unit, min, mode, max)
{
}
/// <summary>
/// Tells if the task is allowed to run at this time of the day.
/// </summary>
/// <param name="eventTime">A date/time; only the time of the day will be used.</param>
/// <returns>true if the task is allowed to run at this time of the day, false otherwise.</returns>
public bool IsAllowedTime(SimulationTime eventTime)
{
return(eventTime.InDayTimeInterval(this.DailyHourStart, this.DailyHourEnd) &&
(this.onHolidays || (!eventTime.IsSunday) ||
(!eventTime.NextDown().IsSunday))); //Case of Sunday at 00:00
}
/// <summary>
/// To be called before each replication to reset some parameters.
/// Automatically called by <see cref="SimulationDataSet.PrepareForNextReplication"/>
/// </summary>
protected internal virtual void PrepareForNextReplication()
{
this.lastRefreshTime = SimulationTime.MinValue;
this.cumulatedWorkTime = SimulationTime.Zero;
this.tasksAssigned.Clear();
}
public TimeDistribution(SimulationTime constantValue) :
this(constantValue.Unit, constantValue, constantValue, constantValue)
{
}
public void Validate()
{
#pragma warning disable 618 //Disable warning for obsolete "DoNotInterrupt"
if (this.phaseInterruptionPolicy == PhaseInterruptionPolicies.DoNotInterrupt)
#pragma warning restore 618
{ //Back compatibility
this.taskInterruptionPolicy = TaskInterruptionPolicies.ContinueOrResumeWithError;
this.phaseInterruptionPolicy = PhaseInterruptionPolicies.ContinueOrDropWithError;
}
if (this.taskType.IsSubCodeOf(StandardTaskType.ExternalCondition) ||
this.taskType.IsSubCodeOf(StandardTaskType.CriticalEvents))
{
this.taskInterruptionPolicy = TaskInterruptionPolicies.DropWithError;
this.phaseInterruptionPolicy = PhaseInterruptionPolicies.ResumeOrDropWithError;
this.scenarioInterruptionPolicy = ScenarioInterruptionPolicies.DropWithoutError;
//this.relativeTime = Task.RelativeTimeType.TimeWindow;
//this.dailyHourStart = TimeSpan.Zero;
//this.dailyHourEnd = TimeSpan.Zero;
//this.onHolidays = true;
this.autoExpandToAllCrewmen = false;
this.numberOfCrewmenNeeded = 0;
this.Rotation = SimulationTime.Zero;
this.duplicatesPolicy = TaskDuplicatesPolicy.MergeDuplicates;
this.masterTasks.Clear();
this.parallelTasks.Clear();
this.priority = 700;
}
else
{
this.slaveTasks.Clear(); //Only external conditions can have slaves
if (this.relativeDate == RelativeDateType.TriggeredByAnEvent)
{
this.StartDate = TimeDistribution.Zero;
this.Duration = new TimeDistribution(SimulationTime.ArbitraryLargeDuration);
this.duplicatesPolicy = TaskDuplicatesPolicy.MergeDuplicates;
this.parallelTasks.Clear();
this.phaseTypes.Clear();
}
else
{
this.masterTasks.Clear();
}
if (this.phaseInterruptionPolicy == PhaseInterruptionPolicies.WholePhase)
{
this.DailyHourStart = SimulationTime.Zero;
this.DailyHourEnd = SimulationTime.Zero;
this.RelativeDate = RelativeDateType.RelativeStartFromStartOfPhase;
this.StartDate = TimeDistribution.Zero;
this.Duration = new TimeDistribution(SimulationTime.ArbitraryLargeDuration);
this.parallelTasks.Clear();
}
else if ((this.phaseInterruptionPolicy == PhaseInterruptionPolicies.Obligatory) &&
(this.relativeDate != RelativeDateType.RelativeStartFromStartOfPhase) &&
(this.relativeDate != RelativeDateType.RelativeStartFromEndOfPhase) &&
(this.relativeDate != RelativeDateType.RelativeStopFromEndOfPhase))
{
this.phaseInterruptionPolicy = PhaseInterruptionPolicies.DropWithError;
}
switch (this.relativeDate)
{
case RelativeDateType.RelativeStopFromEndOfPhase:
case RelativeDateType.RelativeStartFromStartOfPhase:
case RelativeDateType.RelativeStartFromEndOfPhase:
case RelativeDateType.RelativeStartFromPreviousStart:
this.DateOffset = default(TimeDistribution);
break;
}
if (((this.relativeDate == RelativeDateType.AbsoluteStartMonthDay) ||
(this.relativeDate == RelativeDateType.AbsoluteStartWeekDay)))
{
this.StartDate.Unit = TimeUnit.Days;
}
if (this.autoExpandToAllCrewmen)
{
this.numberOfCrewmenNeeded = 1;
this.Rotation = SimulationTime.Zero;
}
}
this.Duration.Validate();
this.StartDate.Validate();
}
/// <summary>
/// To call when the task has been waiting until now, in order to update the statistics of the task.
/// </summary>
/// <param name="currentTime">Current simulation time.</param>
public virtual void SleepUntilNow(SimulationTime currentTime)
{
this.lastProcessTime = currentTime;
}
