Package org.apache.hadoop.hdfs.server.datanode.fsdataset

Class FsDatasetSpi.FsVolumeReferences

java.lang.Object

org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi.FsVolumeReferences

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, java.lang.Iterable<FsVolumeSpi>

Enclosing interface:

FsDatasetSpi<V extends FsVolumeSpi>

public static class FsDatasetSpi.FsVolumeReferences
extends java.lang.Object
implements java.lang.Iterable<FsVolumeSpi>, java.io.Closeable

It behaviors as an unmodifiable list of FsVolume. Individual FsVolume can be obtained by using get(int). This also holds the reference counts for these volumes. It releases all the reference counts in close().

Constructor Summary

Constructors

Constructor	Description
FsVolumeReferences(java.util.List<S> curVolumes)

Method Summary

Modifier and Type	Method	Description
void	close()
FsVolumeSpi	get(int index)	Get the volume for a given index.
FsVolumeReference	getReference(int index)	Get the reference for a given index.
java.util.Iterator<FsVolumeSpi>	iterator()
int	size()	Get the number of volumes.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

FsVolumeReferences

public FsVolumeReferences(java.util.List<S> curVolumes)

Method Detail

iterator

public java.util.Iterator<FsVolumeSpi> iterator()

Specified by:

iterator in interface java.lang.Iterable<FsVolumeSpi>

size

public int size()

Get the number of volumes.

get

public FsVolumeSpi get(int index)

Get the volume for a given index.

getReference

public FsVolumeReference getReference(int index)

Get the reference for a given index.

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable

Throws:

java.io.IOException