/// <summary>
/// Reads in the scheduling plan if one exists and has not previously been read; returns true if the scheduling plan
/// both exists and is valid, or false otherwise.
/// </summary>
private bool GetSchedulingPlanAndAlgorithm()
{
// Read the plan, if any.
if (_schedulingPlan == null)
{
_schedulingPlan = new SchedulingPlan(_configCache, _schedulingData);
ReadSchedulingPlan(_schedulingData.GetRequestsByHierarchy(null).First().BuildRequest.SubmissionId);
}
if (_customRequestSchedulingAlgorithm == null)
{
string customScheduler = Environment.GetEnvironmentVariable("MSBUILDCUSTOMSCHEDULER");
if (!String.IsNullOrEmpty(customScheduler))
{
// Assign to the delegate
if (customScheduler.Equals("WithPlanByMostImmediateReferences", StringComparison.OrdinalIgnoreCase) && _schedulingPlan.IsPlanValid)
{
_customRequestSchedulingAlgorithm = AssignUnscheduledRequestsWithPlanByMostImmediateReferences;
}
else if (customScheduler.Equals("WithPlanByGreatestPlanTime", StringComparison.OrdinalIgnoreCase) && _schedulingPlan.IsPlanValid)
{
_customRequestSchedulingAlgorithm = AssignUnscheduledRequestsWithPlanByGreatestPlanTime;
}
else if (customScheduler.Equals("ByTraversalsFirst", StringComparison.OrdinalIgnoreCase))
{
_customRequestSchedulingAlgorithm = AssignUnscheduledRequestsByTraversalsFirst;
}
else if (customScheduler.Equals("WithConfigurationCountLevelling", StringComparison.OrdinalIgnoreCase))
{
_customRequestSchedulingAlgorithm = AssignUnscheduledRequestsWithConfigurationCountLevelling;
}
else if (customScheduler.Equals("WithSmallestFileSize", StringComparison.OrdinalIgnoreCase))
{
_customRequestSchedulingAlgorithm = AssignUnscheduledRequestsWithSmallestFileSize;
}
else if (customScheduler.Equals("WithLargestFileSize", StringComparison.OrdinalIgnoreCase))
{
_customRequestSchedulingAlgorithm = AssignUnscheduledRequestsWithLargestFileSize;
}
else if (customScheduler.Equals("WithMaxWaitingRequests", StringComparison.OrdinalIgnoreCase))
{
_customRequestSchedulingAlgorithm = AssignUnscheduledRequestsWithMaxWaitingRequests;
}
else if (customScheduler.Equals("WithMaxWaitingRequests2", StringComparison.OrdinalIgnoreCase))
{
_customRequestSchedulingAlgorithm = AssignUnscheduledRequestsWithMaxWaitingRequests2;
}
else if (customScheduler.Equals("FIFO", StringComparison.OrdinalIgnoreCase))
{
_customRequestSchedulingAlgorithm = AssignUnscheduledRequestsFIFO;
}
else if (customScheduler.Equals("CustomSchedulerForSQL", StringComparison.OrdinalIgnoreCase))
{
_customRequestSchedulingAlgorithm = AssignUnscheduledRequestsUsingCustomSchedulerForSQL;
string multiplier = Environment.GetEnvironmentVariable("MSBUILDCUSTOMSCHEDULERFORSQLCONFIGURATIONLIMITMULTIPLIER");
double convertedMultiplier = 0;
if (!Double.TryParse(multiplier, out convertedMultiplier) || convertedMultiplier < 1)
{
_customSchedulerForSQLConfigurationLimitMultiplier = DefaultCustomSchedulerForSQLConfigurationLimitMultiplier;
}
else
{
_customSchedulerForSQLConfigurationLimitMultiplier = convertedMultiplier;
}
}
}
}
return _schedulingPlan.IsPlanValid;
}
/// <summary>
/// Retrieves the scheduling plan from the previous run.
/// </summary>
private void ReadSchedulingPlan(int submissionId)
{
_schedulingPlan = new SchedulingPlan(_configCache, _schedulingData);
_schedulingPlan.ReadPlan(submissionId, _componentHost.LoggingService, new BuildEventContext(submissionId, 0, 0, 0, 0, 0));
}
/// <summary>
/// Resets the scheduler.
/// </summary>
public void Reset()
{
DumpConfigurations();
DumpRequests();
_schedulingPlan = null;
_schedulingData = new SchedulingData();
_availableNodes = new Dictionary<int, NodeInfo>(8);
_currentInProcNodeCount = 0;
_currentOutOfProcNodeCount = 0;
_nextGlobalRequestId = 0;
_customRequestSchedulingAlgorithm = null;
}
/// <summary>
/// Write out the scheduling information so the next time we can read the plan back in and use it.
/// </summary>
private void WriteSchedulingPlan(int submissionId)
{
SchedulingPlan plan = new SchedulingPlan(_configCache, _schedulingData);
plan.WritePlan(submissionId, _componentHost.LoggingService, new BuildEventContext(submissionId, 0, 0, 0, 0, 0));
}