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

Class CachedBlock

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.CachedBlock

All Implemented Interfaces:

org.apache.hadoop.util.IntrusiveCollection.Element, org.apache.hadoop.util.LightWeightGSet.LinkedElement

@LimitedPrivate("HDFS")
public final class CachedBlock
extends java.lang.Object
implements org.apache.hadoop.util.IntrusiveCollection.Element, org.apache.hadoop.util.LightWeightGSet.LinkedElement

Represents a cached block.

Constructor Summary

Constructors

Constructor	Description
CachedBlock(long blockId, short replication, boolean mark)

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object o)
long	getBlockId()
java.util.List<DatanodeDescriptor>	getDatanodes(DatanodeDescriptor.CachedBlocksList.Type type)	Get a list of the datanodes which this block is cached, planned to be cached, or planned to be uncached on.
boolean	getMark()
org.apache.hadoop.util.LightWeightGSet.LinkedElement	getNext()
org.apache.hadoop.util.IntrusiveCollection.Element	getNext(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list)
org.apache.hadoop.util.IntrusiveCollection.Element	getPrev(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list)
short	getReplication()
int	hashCode()
void	insertInternal(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list, org.apache.hadoop.util.IntrusiveCollection.Element prev, org.apache.hadoop.util.IntrusiveCollection.Element next)
boolean	isInList(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list)
boolean	isPresent(DatanodeDescriptor.CachedBlocksList cachedBlocksList)	Return true if this CachedBlock is present on the given list.
void	removeInternal(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list)
void	setNext(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list, org.apache.hadoop.util.IntrusiveCollection.Element next)
void	setNext(org.apache.hadoop.util.LightWeightGSet.LinkedElement next)
void	setPrev(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list, org.apache.hadoop.util.IntrusiveCollection.Element prev)
void	setReplicationAndMark(short replication, boolean mark)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

CachedBlock

public CachedBlock(long blockId,
                   short replication,
                   boolean mark)

Method Detail

getBlockId

public long getBlockId()

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

setReplicationAndMark

public void setReplicationAndMark(short replication,
                                  boolean mark)

getMark

public boolean getMark()

getReplication

public short getReplication()

isPresent

public boolean isPresent(DatanodeDescriptor.CachedBlocksList cachedBlocksList)

Return true if this CachedBlock is present on the given list.

getDatanodes

public java.util.List<DatanodeDescriptor> getDatanodes(DatanodeDescriptor.CachedBlocksList.Type type)

Get a list of the datanodes which this block is cached, planned to be cached, or planned to be uncached on.

Parameters:

type - If null, this parameter is ignored. If it is non-null, we match only datanodes which have it on this list. See DatanodeDescriptor.CachedBlocksList.Type for a description of all the lists.

Returns:

The list of datanodes. Modifying this list does not alter the state of the CachedBlock.

insertInternal

public void insertInternal(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list,
                           org.apache.hadoop.util.IntrusiveCollection.Element prev,
                           org.apache.hadoop.util.IntrusiveCollection.Element next)

Specified by:

insertInternal in interface org.apache.hadoop.util.IntrusiveCollection.Element

setPrev

public void setPrev(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list,
                    org.apache.hadoop.util.IntrusiveCollection.Element prev)

Specified by:

setPrev in interface org.apache.hadoop.util.IntrusiveCollection.Element

setNext

public void setNext(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list,
                    org.apache.hadoop.util.IntrusiveCollection.Element next)

Specified by:

setNext in interface org.apache.hadoop.util.IntrusiveCollection.Element

removeInternal

public void removeInternal(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list)

Specified by:

removeInternal in interface org.apache.hadoop.util.IntrusiveCollection.Element

getPrev

public org.apache.hadoop.util.IntrusiveCollection.Element getPrev(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list)

Specified by:

getPrev in interface org.apache.hadoop.util.IntrusiveCollection.Element

getNext

public org.apache.hadoop.util.IntrusiveCollection.Element getNext(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list)

Specified by:

getNext in interface org.apache.hadoop.util.IntrusiveCollection.Element

isInList

public boolean isInList(org.apache.hadoop.util.IntrusiveCollection<? extends org.apache.hadoop.util.IntrusiveCollection.Element> list)

Specified by:

isInList in interface org.apache.hadoop.util.IntrusiveCollection.Element

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

setNext

public void setNext(org.apache.hadoop.util.LightWeightGSet.LinkedElement next)

Specified by:

setNext in interface org.apache.hadoop.util.LightWeightGSet.LinkedElement

getNext

public org.apache.hadoop.util.LightWeightGSet.LinkedElement getNext()

Specified by:

getNext in interface org.apache.hadoop.util.LightWeightGSet.LinkedElement