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

Class Snapshot.Root

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.INode

org.apache.hadoop.hdfs.server.namenode.INodeWithAdditionalFields

org.apache.hadoop.hdfs.server.namenode.INodeDirectory

org.apache.hadoop.hdfs.server.namenode.snapshot.Snapshot.Root

All Implemented Interfaces:

java.lang.Comparable<byte[]>, INodeAttributes, INodeDirectoryAttributes, Diff.Element<byte[]>, org.apache.hadoop.util.LightWeightGSet.LinkedElement

Enclosing class:

Snapshot

public static class Snapshot.Root
extends INodeDirectory

The root directory of the snapshot.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hdfs.server.namenode.INodeDirectory

INodeDirectory.SnapshotAndINode

Nested classes/interfaces inherited from class org.apache.hadoop.hdfs.server.namenode.INode

INode.BlocksMapUpdateInfo, INode.Feature, INode.QuotaDelta, INode.ReclaimContext

Nested classes/interfaces inherited from interface org.apache.hadoop.hdfs.server.namenode.INodeAttributes

INodeAttributes.SnapshotCopy

Nested classes/interfaces inherited from interface org.apache.hadoop.hdfs.server.namenode.INodeDirectoryAttributes

INodeDirectoryAttributes.CopyWithQuota, INodeDirectoryAttributes.SnapshotCopy

Field Summary

Fields inherited from class org.apache.hadoop.hdfs.server.namenode.INodeDirectory

DEFAULT_FILES_PER_DIRECTORY

Fields inherited from class org.apache.hadoop.hdfs.server.namenode.INodeWithAdditionalFields

features

Fields inherited from class org.apache.hadoop.hdfs.server.namenode.INode

LOG

Method Summary

Modifier and Type	Method	Description
ContentSummaryComputationContext	computeContentSummary(int snapshotId, ContentSummaryComputationContext summary)	Count subtree content summary with a ContentCounts.
INode	getChild(byte[] name, int snapshotId)
ReadOnlyList<INode>	getChildrenList(int snapshotId)
java.lang.String	getFullPathName()
java.lang.String	getRootFullPathName()	Get the full path name of the root directory of this snapshot.
boolean	metadataEquals(INodeDirectoryAttributes other)	Compare the metadata with another INodeDirectory

Methods inherited from class org.apache.hadoop.hdfs.server.namenode.INodeDirectory

accept, addChild, addChild, addChildAtLoading, addSnapshot, addSnapshotFeature, addSnapshottableFeature, addSpaceConsumed, asDirectory, cleanSubtree, cleanSubtreeRecursively, clear, clearChildren, computeDirectoryContentSummary, computeQuotaUsage, computeQuotaUsage4CurrentDirectory, destroyAndCollectBlocks, dumpTreeRecursively, dumpTreeRecursively, getChildrenNum, getDiffs, getDirectorySnapshottableFeature, getDirectoryWithQuotaFeature, getDirectoryWithSnapshotFeature, getLocalStoragePolicyID, getQuotaCounts, getSnapshot, getSnapshotINode, getStoragePolicyID, isDescendantOfSnapshotRoot, isDirectory, isSnapshottable, isWithSnapshot, recordModification, removeChild, removeChild, removeSnapshot, removeSnapshottableFeature, renameSnapshot, replaceChild, saveChild2Snapshot, searchChild, setSnapshotQuota, toDetailString, undoRename4DstParent, undoRename4ScrParent, valueOf

Methods inherited from class org.apache.hadoop.hdfs.server.namenode.INodeWithAdditionalFields

addAclFeature, addFeature, addXAttrFeature, getAclFeature, getFeature, getFeatures, getFsPermissionShort, getId, getLocalNameBytes, getNext, getPermissionLong, getPermissionStatus, removeAclFeature, removeFeature, removeXAttrFeature, setAccessTime, setLocalName, setModificationTime, setNext, updateModificationTime

Methods inherited from class org.apache.hadoop.hdfs.server.namenode.INode

asFile, asReference, asSymlink, compareTo, computeAndConvertContentSummary, computeContentSummary, computeQuotaUsage, computeQuotaUsage, dumpINode, dumpParentINodes, dumpTreeRecursively, dumpTreeRecursively, equals, getAccessTime, getAclFeature, getFsPermission, getFullPathAndObjectString, getGroupName, getKey, getLocalName, getModificationTime, getObjectString, getParent, getParentReference, getParentString, getPathComponents, getPathComponents, getPathNames, getStoragePolicyIDForQuota, getUserName, getXAttrFeature, hashCode, isAncestorDirectory, isDeleted, isFile, isInCurrentState, isInLatestSnapshot, isLastReference, isQuotaSet, isReference, isSetStoragePolicy, isSymlink, setAccessTime, setModificationTime, setParent, setParentReference, shouldRecordInSrcSnapshot, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.hadoop.hdfs.server.namenode.INodeAttributes

getAccessTime, getAclFeature, getFsPermission, getFsPermissionShort, getGroupName, getLocalNameBytes, getModificationTime, getPermissionLong, getUserName, getXAttrFeature

Method Detail

getChildrenList

public ReadOnlyList<INode> getChildrenList(int snapshotId)

Overrides:

getChildrenList in class INodeDirectory

Parameters:

snapshotId - if it is not Snapshot.CURRENT_STATE_ID, get the result from the corresponding snapshot; otherwise, get the result from the current directory.

Returns:

the current children list if the specified snapshot is null; otherwise, return the children list corresponding to the snapshot. Note that the returned list is never null.

getChild

public INode getChild(byte[] name,
                      int snapshotId)

Overrides:

getChild in class INodeDirectory

Parameters:

name - the name of the child

snapshotId - if it is not Snapshot.CURRENT_STATE_ID, get the result from the corresponding snapshot; otherwise, get the result from the current directory.

Returns:

the child inode.

computeContentSummary

public ContentSummaryComputationContext computeContentSummary(int snapshotId,
                                                              ContentSummaryComputationContext summary)
                                                       throws org.apache.hadoop.security.AccessControlException

Description copied from class: INode

Count subtree content summary with a ContentCounts.

Overrides:

computeContentSummary in class INodeDirectory

Parameters:

snapshotId - Specify the time range for the calculation. If this parameter equals to Snapshot.CURRENT_STATE_ID, the result covers both the current states and all the snapshots. Otherwise the result only covers all the files/directories contained in the specific snapshot.

summary - the context object holding counts for the subtree.

Returns:

The same objects as summary.

Throws:

org.apache.hadoop.security.AccessControlException

metadataEquals

public boolean metadataEquals(INodeDirectoryAttributes other)

Description copied from class: INodeDirectory

Compare the metadata with another INodeDirectory

Specified by:

metadataEquals in interface INodeDirectoryAttributes

Overrides:

metadataEquals in class INodeDirectory

getFullPathName

public java.lang.String getFullPathName()

Overrides:

getFullPathName in class INode

getRootFullPathName

public java.lang.String getRootFullPathName()

Get the full path name of the root directory of this snapshot.

Returns:

full path to the root directory of the snapshot