/// <summary>
/// Assigns the data cooker to the appropriate pass(es) and block(s).
/// </summary>
/// <param name="scheduler">
/// The scheduler in which this node participates.
/// </param>
/// <param name="dependentPass">
/// The pass in which the dependent cooker that resulted in this call to <see cref="Schedule"/> runs.
/// This parameter may be null.
/// </param>
internal override void Schedule(ISourceDataCookerScheduler scheduler, SchedulingPass dependentPass)
{
if (dependentPass == null)
{
// An AsRequired cooker should never be scheduled by itself - but only when required by
// another cooker.
//
return;
}
if (this.Passes.Contains(dependentPass))
{
// Already been scheduled for this pass
return;
}
// change the starting block to match the block of the dependent cooker
this.Pass = dependentPass;
this.SetStatus(SchedulingStatus.NotScheduled);
base.Schedule(scheduler, null);
Debug.Assert(this.Status == SchedulingStatus.Scheduled);
Debug.Assert(this.Pass != null);
Debug.Assert(this.Block != null);
this.Passes.Add(dependentPass);
}
/// <summary>
/// Assigns <see cref="PassIndex"/> and <see cref="PassBlockIndex"/>.
/// </summary>
/// <param name="scheduler">
/// The scheduler in which this node participates.
/// </param>
/// <param name="dependentPass">
/// The pass in which the dependent cooker that resulted in this call to <see cref="Schedule"/> runs.
/// This parameter may be null.
/// </param>
internal virtual void Schedule(ISourceDataCookerScheduler scheduler, SchedulingPass dependentPass)
{
Debug.Assert(!(scheduler is null));
if (this.Status == SchedulingStatus.Scheduled)
{
return;
}
if (this.Status == SchedulingStatus.Scheduling)
{
throw new InvalidOperationException(
$"Source data cooker {nameof(this.DataCookerPath)} is involved in a circular dependency.");
}
this.Status = SchedulingStatus.Scheduling;
// An AsRequired node will establish this before scheduling
if (this.Pass == null)
{
this.Pass = scheduler.Pass0;
}
this.Block = this.Pass.Block0;
var requiredCookerPaths = this.CookerDependencies.RequiredDataCookers ?? new List <DataCookerPath>();
List <DataCookerSchedulingNode> dependencies;
{
// Sort dependencies so that AsRequired are done last. These need to know the final PassIndex
// of this cooker before they can be scheduled.
//
var normalDependencies = new List <DataCookerSchedulingNode>();
var asRequiredDependencies = new List <DataCookerSchedulingNode>();
foreach (var requiredDataCookerPath in requiredCookerPaths)
{
var sourceParserId = requiredDataCookerPath.SourceParserId;
if (!StringComparer.Ordinal.Equals(sourceParserId, this.DataCooker.Path.SourceParserId))
{
throw new InvalidOperationException(
$"A source data parser may not require data cookers from other source parsers: {this.DataCookerPath}");
}
var requiredCookerNode = scheduler.GetSchedulingNode(requiredDataCookerPath);
Debug.Assert(!(requiredCookerNode is null));
var productionStrategy = requiredCookerNode.SourceDataCookerDescriptor.DataProductionStrategy;
if (productionStrategy == DataProductionStrategy.AsRequired)
{
asRequiredDependencies.Add(requiredCookerNode);
}
else
{
normalDependencies.Add(requiredCookerNode);
}
}
if (this.SourceDataCookerDescriptor.DataProductionStrategy == DataProductionStrategy.AsRequired)
{
if (normalDependencies.Any())
{
throw new InvalidOperationException(
$"A source data cooker with a {nameof(DataProductionStrategy)} " +
$"of {nameof(DataProductionStrategy.AsRequired)} cannot depend on source data " +
$"cookers not using this same {nameof(DataProductionStrategy)}: {this.DataCooker.Path} " +
$"depends on {normalDependencies[0].DataCookerPath}");
}
}
dependencies = normalDependencies.Concat(asRequiredDependencies).ToList();
}
// Make sure all of the dependencies are scheduled.
foreach (var requiredCookerNode in dependencies)
{
requiredCookerNode.Schedule(scheduler, this.Pass);
if (this.PassIndex > requiredCookerNode.PassIndex)
{
continue;
}
if (this.CookerDependencies.DependencyTypes is null ||
!this.CookerDependencies.DependencyTypes.TryGetValue(
requiredCookerNode.DataCookerPath, out var dependencyType))
{
dependencyType = DataCookerDependencyType.AlignedWithProductionStrategy;
}
var productionStrategy = requiredCookerNode.SourceDataCookerDescriptor.DataProductionStrategy;
if (productionStrategy == DataProductionStrategy.AsRequired)
{
if (dependencyType != DataCookerDependencyType.AlignedWithProductionStrategy)
{
// These source cookers will automatically run in any/all stages where a dependent source
// cooker is scheduled. Given that, only DataCookerDependencyType.AlignedWithProductionStrategy
// make sense.
//
throw new InvalidOperationException(
$"A SourceCooker whose {nameof(DataProductionStrategy)} is " +
$"{nameof(DataProductionStrategy.AsRequired)} can only be consumed using " +
$"{nameof(DataCookerDependencyType.AlignedWithProductionStrategy)}");
}
}
var oldPassIndex = this.Pass.Index;
if (requiredCookerNode.PassIndex > this.PassIndex)
{
this.Pass = requiredCookerNode.Pass;
}
if (productionStrategy == DataProductionStrategy.PostSourceParsing)
{
if (dependencyType == DataCookerDependencyType.AlignedWithProductionStrategy)
{
if (requiredCookerNode.PassIndex == int.MaxValue)
{
throw new InvalidOperationException(
"The number of required passes through the data source exceeds maximum allowed value.");
}
if (requiredCookerNode.Pass.Next == null)
{
requiredCookerNode.Pass.CreateNext();
}
Debug.Assert(requiredCookerNode.Pass.Next != null);
// this cannot take place in the same pass as the required data cooker
if (requiredCookerNode.Pass.Next.Index > this.PassIndex)
{
this.Pass = requiredCookerNode.Pass.Next;
}
}
}
if (this.PassIndex > oldPassIndex)
{
// If we've moved into a higher source pass, then the block
// should reset to zero, or we could end up in an invalid state.
//
this.Block = this.Pass.Block0;
}
if (this.PassIndex == requiredCookerNode.PassIndex)
{
// This should be set at least to the requiredCooker, in case that cooker has a
// required cooker.
//
if (this.PassBlockIndex < requiredCookerNode.PassBlockIndex)
{
this.Block = requiredCookerNode.Block;
}
if (dependencyType == DataCookerDependencyType.AsConsumed ||
productionStrategy == DataProductionStrategy.AsRequired ||
(dependencyType == DataCookerDependencyType.AlignedWithProductionStrategy &&
productionStrategy == DataProductionStrategy.AsConsumed))
{
// if this takes place in the same pass as the required cooker, just make it come after
// the required cooker in the pass
//
if (requiredCookerNode.Block.Next == null)
{
this.Block = requiredCookerNode.Block.CreateNext();
}
else if (this.PassBlockIndex < requiredCookerNode.Block.Next.Index)
{
this.Block = requiredCookerNode.Block.Next;
}
}
}
}
this.Block.Nodes.Add(this);
this.Status = SchedulingStatus.Scheduled;
}
