org.apache.hadoop.hdfs.server.namenode

Class INodeReference.WithCount

java.lang.Object

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

org.apache.hadoop.hdfs.server.namenode.INodeReference

org.apache.hadoop.hdfs.server.namenode.INodeReference.WithCount

All Implemented Interfaces:

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

Enclosing class:

INodeReference

public static class INodeReference.WithCount
extends INodeReference

An anonymous reference with reference count.

Nested Class Summary

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

INodeReference.DstReference, INodeReference.WithCount, INodeReference.WithName

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

Field Summary

Fields

Modifier and Type	Field and Description
static Comparator<INodeReference.WithName>	WITHNAME_COMPARATOR Compare snapshot with IDs, where null indicates the current status thus is greater than any non-null snapshot.

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

LOG

Constructor Summary

Constructors

Constructor and Description
INodeReference.WithCount(INodeReference parent, org.apache.hadoop.hdfs.server.namenode.INode referred)

Method Summary

Methods

Modifier and Type	Method and Description
void	addReference(INodeReference ref) Increment and then return the reference count.
INodeReference.WithName	getLastWithName() Return the last WithName reference if there is any, null otherwise.
INodeReference	getParentRef(int snapshotId)
int	getReferenceCount()
void	removeReference(INodeReference ref) Decrement and then return the reference count.

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

asDirectory, asFile, asReference, asSymlink, cleanSubtree, clear, computeContentSummary, computeQuotaUsage, destroyAndCollectBlocks, dumpTreeRecursively, getAccessTime, getDstSnapshotId, getFsPermission, getFsPermissionShort, getGroupName, getId, getLocalNameBytes, getLocalStoragePolicyID, getModificationTime, getPermissionLong, getPermissionStatus, getQuotaCounts, getReferredINode, getSnapshotINode, getStoragePolicyID, getUserName, isDirectory, isFile, isReference, isSymlink, setAccessTime, setLocalName, setModificationTime, setReferredINode, tryRemoveReference, updateModificationTime

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

addSpaceConsumed, compareTo, computeAndConvertContentSummary, computeContentSummary, computeQuotaUsage, computeQuotaUsage, dumpTreeRecursively, dumpTreeRecursively, equals, getAccessTime, getAclFeature, getFsPermission, getFullPathName, getGroupName, getKey, getLocalName, getModificationTime, getObjectString, getParent, getParentReference, getParentString, getPathComponents, getPathComponents, getPathNames, getStoragePolicyIDForQuota, getUserName, getXAttrFeature, hashCode, isAncestorDirectory, isDeleted, isInCurrentState, isInLatestSnapshot, isLastReference, isQuotaSet, setAccessTime, setModificationTime, setParent, setParentReference, shouldRecordInSrcSnapshot, toDetailString, toString

Methods inherited from class java.lang.Object

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

Field Detail

WITHNAME_COMPARATOR

public static final Comparator<INodeReference.WithName> WITHNAME_COMPARATOR

Compare snapshot with IDs, where null indicates the current status thus is greater than any non-null snapshot.

Constructor Detail

INodeReference.WithCount

public INodeReference.WithCount(INodeReference parent,
                        org.apache.hadoop.hdfs.server.namenode.INode referred)

Method Detail

getReferenceCount

public int getReferenceCount()

addReference

public void addReference(INodeReference ref)

Increment and then return the reference count.

removeReference

public void removeReference(INodeReference ref)

Decrement and then return the reference count.

getLastWithName

public INodeReference.WithName getLastWithName()

Return the last WithName reference if there is any, null otherwise.

getParentRef

public INodeReference getParentRef(int snapshotId)

Returns:

the WithName/DstReference node contained in the given snapshot.