Example #1
0
        /// <summary>Concat all the blocks from srcs to trg and delete the srcs files</summary>
        /// <param name="fsd">FSDirectory</param>
        /// <exception cref="System.IO.IOException"/>
        internal static void UnprotectedConcat(FSDirectory fsd, INodesInPath targetIIP, INodeFile
                                               [] srcList, long timestamp)
        {
            System.Diagnostics.Debug.Assert(fsd.HasWriteLock());
            if (NameNode.stateChangeLog.IsDebugEnabled())
            {
                NameNode.stateChangeLog.Debug("DIR* FSNamesystem.concat to " + targetIIP.GetPath(
                                                  ));
            }
            INodeFile   trgInode = targetIIP.GetLastINode().AsFile();
            QuotaCounts deltas   = ComputeQuotaDeltas(fsd, trgInode, srcList);

            VerifyQuota(fsd, targetIIP, deltas);
            // the target file can be included in a snapshot
            trgInode.RecordModification(targetIIP.GetLatestSnapshotId());
            INodeDirectory trgParent = targetIIP.GetINode(-2).AsDirectory();

            trgInode.ConcatBlocks(srcList);
            // since we are in the same dir - we can use same parent to remove files
            int count = 0;

            foreach (INodeFile nodeToRemove in srcList)
            {
                if (nodeToRemove != null)
                {
                    nodeToRemove.SetBlocks(null);
                    nodeToRemove.GetParent().RemoveChild(nodeToRemove);
                    fsd.GetINodeMap().Remove(nodeToRemove);
                    count++;
                }
            }
            trgInode.SetModificationTime(timestamp, targetIIP.GetLatestSnapshotId());
            trgParent.UpdateModificationTime(timestamp, targetIIP.GetLatestSnapshotId());
            // update quota on the parent directory with deltas
            FSDirectory.UnprotectedUpdateCount(targetIIP, targetIIP.Length() - 1, deltas);
        }