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

Class FSImageFormat.Loader

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.FSImageFormat.Loader

Enclosing class:

FSImageFormat

public static class FSImageFormat.Loader
extends Object

A one-shot class responsible for loading an image. The load() function should be called once, after which the getter methods may be used to retrieve information about the image that was loaded, if loading was successful.

Method Summary

Modifier and Type	Method	Description
FSDirectory	getFSDirectoryInLoading()
org.apache.hadoop.io.MD5Hash	getLoadedImageMd5()	Return the MD5 checksum of the image that has been loaded.
long	getLoadedImageTxId()
Snapshot	getSnapshot(DataInput in)
void	load(File curFile)
INodeDirectoryAttributes	loadINodeDirectoryAttributes(DataInput in)
INodeFileAttributes	loadINodeFileAttributes(DataInput in)	Load INodeFileAttributes.
INode	loadINodeWithLocalName(boolean isSnapshotINode, DataInput in, boolean updateINodeMap)
INode	loadINodeWithLocalName(boolean isSnapshotINode, DataInput in, boolean updateINodeMap, StartupProgress.Counter counter)
void	updateBlocksMap(INodeFile file)

Methods inherited from class java.lang.Object

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

Method Details

getLoadedImageMd5

public org.apache.hadoop.io.MD5Hash getLoadedImageMd5()

Return the MD5 checksum of the image that has been loaded.

Throws:

IllegalStateException - if load() has not yet been called.

getLoadedImageTxId

public long getLoadedImageTxId()

load

public void load(File curFile)
          throws IOException

Throws:

IOException

updateBlocksMap

public void updateBlocksMap(INodeFile file)

getFSDirectoryInLoading

public FSDirectory getFSDirectoryInLoading()

Returns:

The FSDirectory of the namesystem where the fsimage is loaded

loadINodeWithLocalName

public INode loadINodeWithLocalName(boolean isSnapshotINode,
 DataInput in,
 boolean updateINodeMap)
                             throws IOException

Throws:

IOException

loadINodeWithLocalName

public INode loadINodeWithLocalName(boolean isSnapshotINode,
 DataInput in,
 boolean updateINodeMap,
 StartupProgress.Counter counter)
                             throws IOException

Throws:

IOException

loadINodeFileAttributes

public INodeFileAttributes loadINodeFileAttributes(DataInput in)
                                            throws IOException

Load INodeFileAttributes.

Throws:

IOException

loadINodeDirectoryAttributes

public INodeDirectoryAttributes loadINodeDirectoryAttributes(DataInput in)
                                                      throws IOException

Throws:

IOException

getSnapshot

public Snapshot getSnapshot(DataInput in)
                     throws IOException

Throws:

IOException