public FilteredDirectedGraph(IReadonlyDirectedGraph graph, VisitationTracker nodeFilter)
{
m_graph = graph;
m_nodeFilter = nodeFilter;
m_nodePredicate = node => nodeFilter.WasVisited(node);
m_edgePredicate = edge => nodeFilter.WasVisited(edge.OtherNode);
m_nodeHeights = Lazy.Create(ComputeHeights);
}
/// <inheritdoc />
public GraphPatchingStatistics PartiallyReloadGraph(HashSet <AbsolutePath> affectedSpecs)
{
Contract.Requires(affectedSpecs != null);
var startTime = DateTime.UtcNow;
var mustSkipDueToTransitivity = new VisitationTracker(m_oldPipGraph);
var mustPostponeDueToServicePips = new VisitationTracker(m_oldPipGraph);
var toPostpone = new SortedList <uint, Pip>();
MultiValueDictionary <int, NodeId> nodesByHeight = m_oldPipGraph.TopSort();
int numReloadedPips = 0;
int numNotReloadablePips = 0;
m_builder.SealDirectoryTable.StartPatching();
// go one level at a time:
// - process nodes at the same height in parallel
// - postpone service-related pips because they must be added in the order of creation
// (because, for example, pip builder adds forward edges from service client to service finalization pips)
for (int height = 0; height < nodesByHeight.Count; height++)
{
Parallel.ForEach(
nodesByHeight[height],
new ParallelOptions {
MaxDegreeOfParallelism = m_maxDegreeOfParallelism
},
body: (node) =>
{
var pipId = node.ToPipId();
var pipType = m_oldPipTable.GetPipType(pipId);
// skip non-reloadable pips
if (!s_reloadablePipTypes.Contains(pipType))
{
Interlocked.Increment(ref numNotReloadablePips);
return;
}
var pip = HydratePip(pipId);
AbsolutePath?producingSpec = GetProducerSpecFile(pip);
// check if this node must be skipped due to its spec file being affected
if (producingSpec == null || affectedSpecs.Contains(producingSpec.Value))
{
mustSkipDueToTransitivity.MarkVisited(node);
MarkAllDependentsVisited(mustSkipDueToTransitivity, node);
return;
}
// check if this pip is a service-related pip which must be postponed
if (ServicePipKindUtil.IsServiceRelatedPip(pip))
{
SynchronizedAddToSortedList(toPostpone, pip);
MarkAllDependentsVisited(mustPostponeDueToServicePips, node);
return;
}
// check if this node must be postponed because it depends on a node that was already postponed
if (mustPostponeDueToServicePips.WasVisited(node))
{
SynchronizedAddToSortedList(toPostpone, pip);
MarkAllDependentsVisited(mustPostponeDueToServicePips, node);
return;
}
// check if this node must be skipped due to transitivity
ThrowIfVisited(mustSkipDueToTransitivity, pip);
// everything passed: reload this node
ReloadPip(pip, ref numReloadedPips);
});
}
// add postponed nodes sequentially in the order of creation
foreach (var pip in toPostpone.Values)
{
var serviceKind = ServicePipKindUtil.ServiceKind(pip);
if (serviceKind != ServicePipKind.ServiceShutdown && serviceKind != ServicePipKind.ServiceFinalization)
{
// 'shutdown' and 'finalization' are exception because of forward edges that are added
// during construction from service client pips to service shutdown/finalization pips.
ThrowIfVisited(mustSkipDueToTransitivity, pip);
}
ReloadPip(pip, ref numReloadedPips);
}
m_builder.SealDirectoryTable.FinishPatching();
return(new GraphPatchingStatistics
{
ElapsedMilliseconds = (int)DateTime.UtcNow.Subtract(startTime).TotalMilliseconds,
NumPipsReloaded = numReloadedPips,
NumPipsAutomaticallyAdded = m_builder.PipCount - numReloadedPips,
NumPipsNotReloadable = numNotReloadablePips,
NumPipsSkipped = mustSkipDueToTransitivity.VisitedCount,
AffectedSpecs = affectedSpecs,
});
}