org.apache.hadoop.hdfs.server.namenode

Class INodeMap

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.INodeMap

public class INodeMap
extends Object

Storing all the INodes and maintaining the mapping between INode ID and INode.

Method Summary

Methods

Modifier and Type	Method and Description
void	clear() Clear the map
org.apache.hadoop.hdfs.server.namenode.INode	get(long id) Get the INode with the given id from the map.
Iterator<org.apache.hadoop.hdfs.server.namenode.INodeWithAdditionalFields>	getMapIterator()
void	put(org.apache.hadoop.hdfs.server.namenode.INode inode) Add an INode into the INode map.
void	remove(org.apache.hadoop.hdfs.server.namenode.INode inode) Remove a INode from the map.
int	size()

Methods inherited from class java.lang.Object

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

Method Detail

getMapIterator

public Iterator<org.apache.hadoop.hdfs.server.namenode.INodeWithAdditionalFields> getMapIterator()

put

public final void put(org.apache.hadoop.hdfs.server.namenode.INode inode)

Add an INode into the INode map. Replace the old value if necessary.

Parameters:

inode - The INode to be added to the map.

remove

public final void remove(org.apache.hadoop.hdfs.server.namenode.INode inode)

Remove a INode from the map.

Parameters:

inode - The INode to be removed.

size

public int size()

Returns:

The size of the map.

get

public org.apache.hadoop.hdfs.server.namenode.INode get(long id)

Get the INode with the given id from the map.

Parameters:

id - ID of the INode.

Returns:

The INode in the map with the given id. Return null if no such INode in the map.

clear

public void clear()

Clear the map