Package org.apache.hadoop.hdfs.server.namenode.snapshot

Class FileWithSnapshotFeature

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.snapshot.FileWithSnapshotFeature

All Implemented Interfaces:

INode.Feature

@Private
public class FileWithSnapshotFeature
extends java.lang.Object
implements INode.Feature

Feature for file with snapshot-related information.

Constructor Summary

Constructors

Constructor	Description
FileWithSnapshotFeature(FileDiffList diffs)

Method Summary

Modifier and Type	Method	Description
void	cleanFile(INode.ReclaimContext reclaimContext, INodeFile file, int snapshotId, int priorSnapshotId, byte storagePolicyId)
void	clearDiffs()
void	collectBlocksAndClear(INode.ReclaimContext reclaimContext, INodeFile file)	If some blocks at the end of the block list no longer belongs to any inode, collect them and update the block list.
void	deleteCurrentFile()	We need to distinguish two scenarios: 1) the file is still in the current file directory, it has been modified before while it is included in some snapshot 2) the file is not in the current file directory (deleted), but it is in some snapshot, thus we still keep this inode For both scenarios the file has snapshot feature.
java.lang.String	getDetailedString()
FileDiffList	getDiffs()
short	getMaxBlockRepInDiffs(FileDiff excluded)
boolean	isCurrentFileDeleted()
java.lang.String	toString()
void	updateQuotaAndCollectBlocks(INode.ReclaimContext reclaimContext, INodeFile file, FileDiff removed)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

FileWithSnapshotFeature

public FileWithSnapshotFeature(FileDiffList diffs)

Method Detail

isCurrentFileDeleted

public boolean isCurrentFileDeleted()

deleteCurrentFile

public void deleteCurrentFile()

We need to distinguish two scenarios: 1) the file is still in the current file directory, it has been modified before while it is included in some snapshot 2) the file is not in the current file directory (deleted), but it is in some snapshot, thus we still keep this inode For both scenarios the file has snapshot feature. We set isCurrentFileDeleted to true for 2).

getDiffs

public FileDiffList getDiffs()

getMaxBlockRepInDiffs

public short getMaxBlockRepInDiffs(FileDiff excluded)

Returns:

the max replication factor in diffs

getDetailedString

public java.lang.String getDetailedString()

cleanFile

public void cleanFile(INode.ReclaimContext reclaimContext,
                      INodeFile file,
                      int snapshotId,
                      int priorSnapshotId,
                      byte storagePolicyId)

clearDiffs

public void clearDiffs()

updateQuotaAndCollectBlocks

public void updateQuotaAndCollectBlocks(INode.ReclaimContext reclaimContext,
                                        INodeFile file,
                                        FileDiff removed)

collectBlocksAndClear

public void collectBlocksAndClear(INode.ReclaimContext reclaimContext,
                                  INodeFile file)

If some blocks at the end of the block list no longer belongs to any inode, collect them and update the block list.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object