/// <exception cref="Org.Apache.Hadoop.Hdfs.Protocol.QuotaExceededException"/>
internal RenameOperation(FSDirectory fsd, string src, string dst, INodesInPath srcIIP
, INodesInPath dstIIP)
{
this.fsd = fsd;
this.src = src;
this.dst = dst;
this.srcIIP = srcIIP;
this.dstIIP = dstIIP;
this.srcParentIIP = srcIIP.GetParentINodesInPath();
this.dstParentIIP = dstIIP.GetParentINodesInPath();
BlockStoragePolicySuite bsps = fsd.GetBlockStoragePolicySuite();
srcChild = this.srcIIP.GetLastINode();
srcChildName = srcChild.GetLocalNameBytes();
int srcLatestSnapshotId = srcIIP.GetLatestSnapshotId();
isSrcInSnapshot = srcChild.IsInLatestSnapshot(srcLatestSnapshotId);
srcChildIsReference = srcChild.IsReference();
srcParent = this.srcIIP.GetINode(-2).AsDirectory();
// Record the snapshot on srcChild. After the rename, before any new
// snapshot is taken on the dst tree, changes will be recorded in the
// latest snapshot of the src tree.
if (isSrcInSnapshot)
{
srcChild.RecordModification(srcLatestSnapshotId);
}
// check srcChild for reference
srcRefDstSnapshot = srcChildIsReference ? srcChild.AsReference().GetDstSnapshotId
() : Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot.CurrentStateId;
oldSrcCounts = new QuotaCounts.Builder().Build();
if (isSrcInSnapshot)
{
INodeReference.WithName withName = srcParent.ReplaceChild4ReferenceWithName(srcChild
, srcLatestSnapshotId);
withCount = (INodeReference.WithCount)withName.GetReferredINode();
srcChild = withName;
this.srcIIP = INodesInPath.Replace(srcIIP, srcIIP.Length() - 1, srcChild);
// get the counts before rename
withCount.GetReferredINode().ComputeQuotaUsage(bsps, oldSrcCounts, true);
}
else
{
if (srcChildIsReference)
{
// srcChild is reference but srcChild is not in latest snapshot
withCount = (INodeReference.WithCount)srcChild.AsReference().GetReferredINode();
}
else
{
withCount = null;
}
}
}
internal virtual long RemoveDst()
{
long removedNum = fsd.RemoveLastINode(dstIIP);
if (removedNum != -1)
{
oldDstChild = dstIIP.GetLastINode();
// update the quota count if necessary
fsd.UpdateCountForDelete(oldDstChild, dstIIP);
dstIIP = INodesInPath.Replace(dstIIP, dstIIP.Length() - 1, null);
}
return(removedNum);
}
internal virtual bool RemoveSrc4OldRename()
{
long removedSrc = fsd.RemoveLastINode(srcIIP);
if (removedSrc == -1)
{
NameNode.stateChangeLog.Warn("DIR* FSDirRenameOp.unprotectedRenameTo: " + "failed to rename "
+ src + " to " + dst + " because the source" + " can not be removed");
return(false);
}
else
{
// update the quota count if necessary
fsd.UpdateCountForDelete(srcChild, srcIIP);
srcIIP = INodesInPath.Replace(srcIIP, srcIIP.Length() - 1, null);
return(true);
}
}
/// <exception cref="System.IO.IOException"/>
internal virtual long RemoveSrc()
{
long removedNum = fsd.RemoveLastINode(srcIIP);
if (removedNum == -1)
{
string error = "Failed to rename " + src + " to " + dst + " because the source can not be removed";
NameNode.stateChangeLog.Warn("DIR* FSDirRenameOp.unprotectedRenameTo:" + error);
throw new IOException(error);
}
else
{
// update the quota count if necessary
fsd.UpdateCountForDelete(srcChild, srcIIP);
srcIIP = INodesInPath.Replace(srcIIP, srcIIP.Length() - 1, null);
return(removedNum);
}
}
