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:

Closeable, AutoCloseable, Iterable<FsVolumeSpi>

Enclosing interface:

org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi<V extends FsVolumeSpi>

public static class FsDatasetSpi.FsVolumeReferences
extends Object
implements Iterable<FsVolumeSpi>, 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 and Description
FsDatasetSpi.FsVolumeReferences(List<S> curVolumes)

Method Summary

Methods

Modifier and Type	Method and 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.
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

Constructor Detail

FsDatasetSpi.FsVolumeReferences

public FsDatasetSpi.FsVolumeReferences(List<S> curVolumes)

Method Detail

iterator

public Iterator<FsVolumeSpi> iterator()

Specified by:

iterator in interface 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 IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException