public virtual QuotaCounts CleanDirectory(BlockStoragePolicySuite bsps, INodeDirectory
currentINode, int snapshot, int prior, INode.BlocksMapUpdateInfo collectedBlocks
, IList <INode> removedINodes)
{
QuotaCounts counts = new QuotaCounts.Builder().Build();
IDictionary <INode, INode> priorCreated = null;
IDictionary <INode, INode> priorDeleted = null;
if (snapshot == Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot.CurrentStateId)
{
// delete the current directory
currentINode.RecordModification(prior);
// delete everything in created list
DirectoryWithSnapshotFeature.DirectoryDiff lastDiff = diffs.GetLast();
if (lastDiff != null)
{
counts.Add(lastDiff.diff.DestroyCreatedList(bsps, currentINode, collectedBlocks,
removedINodes));
}
counts.Add(currentINode.CleanSubtreeRecursively(bsps, snapshot, prior, collectedBlocks
, removedINodes, priorDeleted));
}
else
{
// update prior
prior = GetDiffs().UpdatePrior(snapshot, prior);
// if there is a snapshot diff associated with prior, we need to record
// its original created and deleted list before deleting post
if (prior != Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot.NoSnapshotId)
{
DirectoryWithSnapshotFeature.DirectoryDiff priorDiff = this.GetDiffs().GetDiffById
(prior);
if (priorDiff != null && priorDiff.GetSnapshotId() == prior)
{
IList <INode> cList = priorDiff.diff.GetList(Diff.ListType.Created);
IList <INode> dList = priorDiff.diff.GetList(Diff.ListType.Deleted);
priorCreated = CloneDiffList(cList);
priorDeleted = CloneDiffList(dList);
}
}
counts.Add(GetDiffs().DeleteSnapshotDiff(bsps, snapshot, prior, currentINode, collectedBlocks
, removedINodes));
counts.Add(currentINode.CleanSubtreeRecursively(bsps, snapshot, prior, collectedBlocks
, removedINodes, priorDeleted));
// check priorDiff again since it may be created during the diff deletion
if (prior != Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot.NoSnapshotId)
{
DirectoryWithSnapshotFeature.DirectoryDiff priorDiff = this.GetDiffs().GetDiffById
(prior);
if (priorDiff != null && priorDiff.GetSnapshotId() == prior)
{
// For files/directories created between "prior" and "snapshot",
// we need to clear snapshot copies for "snapshot". Note that we must
// use null as prior in the cleanSubtree call. Files/directories that
// were created before "prior" will be covered by the later
// cleanSubtreeRecursively call.
if (priorCreated != null)
{
// we only check the node originally in prior's created list
foreach (INode cNode in priorDiff.GetChildrenDiff().GetList(Diff.ListType.Created
))
{
if (priorCreated.Contains(cNode))
{
counts.Add(cNode.CleanSubtree(bsps, snapshot, Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot
.NoSnapshotId, collectedBlocks, removedINodes));
}
}
}
// When a directory is moved from the deleted list of the posterior
// diff to the deleted list of this diff, we need to destroy its
// descendants that were 1) created after taking this diff and 2)
// deleted after taking posterior diff.
// For files moved from posterior's deleted list, we also need to
// delete its snapshot copy associated with the posterior snapshot.
foreach (INode dNode in priorDiff.GetChildrenDiff().GetList(Diff.ListType.Deleted
))
{
if (priorDeleted == null || !priorDeleted.Contains(dNode))
{
counts.Add(CleanDeletedINode(bsps, dNode, snapshot, prior, collectedBlocks, removedINodes
));
}
}
}
}
}
if (currentINode.IsQuotaSet())
{
currentINode.GetDirectoryWithQuotaFeature().AddSpaceConsumed2Cache(counts.Negation
());
}
return(counts);
}
