/// <summary>
/// Implementation of service operation.
/// </summary>
/// <param name="contextId"></param>
/// <returns></returns>
public bool TrackingStart(string contextId)
{
if (contextId == null || !ContextService.IsValidObjectID(contextId))
{
var detail = new ServiceException
{
Code = ServiceExceptionCode.Arguments
};
throw new FaultException <ServiceException>(detail);
}
lock (_lockStatus)
{
var previousState = ServiceState;
try
{
if (contextId == _localizer.ContextId && previousState == ServiceStateCode.Tracking)
{
// do nothing
return(true);
}
// prepare for tracking
_tracker.ScenarioId = null;
_localizer.Enabled = false;
ServiceState = ServiceStateCode.Tracking;
// notify all subscribers
var serviceStatus = new ServiceStatus
{
ContextId = contextId,
ServiceState = ServiceStateCode.Tracking
};
DoReportServiceStatus(serviceStatus);
if (contextId != _localizer.ContextId)
{
// prepare for new context
ConsecutiveCorrectPredictions = 0;
_localizer.ContextId = contextId;
}
// perform a first prediction
_localizer.CreationAllowed = true;
var prediction = _localizer.Prediction();
if (prediction == null || prediction.PredictedScenario == null)
{
return(false);
}
DispatchPrediction(prediction);
// enable localizer timer for the next predictions
_localizer.Enabled = true;
}
catch (ArgumentException)
{
Silence();
var detail = new ServiceException
{
Code = ServiceExceptionCode.Arguments
};
throw new FaultException <ServiceException>(detail);
}
catch
{
Silence();
return(false);
}
return(true);
}
}