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:

Comparable<byte[]>, org.apache.hadoop.hdfs.server.namenode.INodeAttributes, org.apache.hadoop.hdfs.server.namenode.INodeDirectoryAttributes, Diff.Element<byte[]>, org.apache.hadoop.util.LightWeightGSet.LinkedElement

Enclosing class:

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

Methods

Modifier and Type	Method and Description
org.apache.hadoop.hdfs.server.namenode.ContentSummaryComputationContext	computeContentSummary(int snapshotId, org.apache.hadoop.hdfs.server.namenode.ContentSummaryComputationContext summary) Count subtree content summary with a ContentCounts.
org.apache.hadoop.hdfs.server.namenode.INode	getChild(byte[] name, int snapshotId)
org.apache.hadoop.hdfs.util.ReadOnlyList<org.apache.hadoop.hdfs.server.namenode.INode>	getChildrenList(int snapshotId)
String	getFullPathName()
String	getRootFullPathName() Get the full path name of the root directory of this snapshot.

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

addChild, addChild, 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, isDirectory, isSnapshottable, isWithSnapshot, metadataEquals, 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, 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, dumpTreeRecursively, dumpTreeRecursively, equals, getAccessTime, getAclFeature, getFsPermission, getGroupName, getKey, getLocalName, getModificationTime, getObjectString, getParent, getParentReference, getParentString, getPathComponents, getPathComponents, getPathNames, getStoragePolicyIDForQuota, getUserName, getXAttrFeature, hashCode, isAncestorDirectory, isFile, isInLatestSnapshot, isQuotaSet, isReference, 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 org.apache.hadoop.hdfs.util.ReadOnlyList<org.apache.hadoop.hdfs.server.namenode.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 org.apache.hadoop.hdfs.server.namenode.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 org.apache.hadoop.hdfs.server.namenode.ContentSummaryComputationContext computeContentSummary(int snapshotId,
                                                                                            org.apache.hadoop.hdfs.server.namenode.ContentSummaryComputationContext summary)

Description copied from class: org.apache.hadoop.hdfs.server.namenode.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.

getFullPathName

public String getFullPathName()

Overrides:

getFullPathName in class org.apache.hadoop.hdfs.server.namenode.INode

getRootFullPathName

public String getRootFullPathName()

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

Returns:

full path to the root directory of the snapshot