org.apache.commons.vfs2.provider.hdfs

Class HdfsFileSystem

java.lang.Object

org.apache.commons.vfs2.provider.AbstractVfsComponent

org.apache.commons.vfs2.provider.AbstractFileSystem

org.apache.commons.vfs2.provider.hdfs.HdfsFileSystem

All Implemented Interfaces:

Closeable, AutoCloseable, FileSystem, VfsComponent

public class HdfsFileSystem
extends AbstractFileSystem

A VFS FileSystem that interacts with HDFS.

Since:

2.1

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	HdfsFileSystem(FileName rootName, FileSystemOptions fileSystemOptions) Construct file system.

Method Summary

Modifier and Type	Method and Description
protected void	addCapabilities(Collection<Capability> capabilities) Adds the capabilities of this file system.
void	close() Closes this component.
protected FileObject	createFile(AbstractFileName name) Creates a file object.
FileObject	resolveFile(FileName name) Resolve FileName into FileObject.

Methods inherited from class org.apache.commons.vfs2.provider.AbstractFileSystem

addJunction, addListener, closeCommunicationLink, decorateFileObject, doCloseCommunicationLink, doReplicateFile, fireFileChanged, fireFileCreated, fireFileDeleted, getAttribute, getFileFromCache, getFileSystemManager, getFileSystemOptions, getLastModTimeAccuracy, getParentLayer, getRoot, getRootName, getRootURI, hasCapability, init, isOpen, isReleaseable, notifyAllStreamsClosed, putFileToCache, removeFileFromCache, removeJunction, removeListener, replicateFile, resolveFile, setAttribute

Methods inherited from class org.apache.commons.vfs2.provider.AbstractVfsComponent

getContext, getLogger, setContext, setLogger

Methods inherited from class java.lang.Object

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

Constructor Detail

HdfsFileSystem

protected HdfsFileSystem(FileName rootName,
                         FileSystemOptions fileSystemOptions)

Construct file system.

Parameters:

rootName - Name of the root directory of this file system.

fileSystemOptions - options for this file system instance.

Method Detail

addCapabilities

protected void addCapabilities(Collection<Capability> capabilities)

Description copied from class: AbstractFileSystem

Adds the capabilities of this file system.

Specified by:

addCapabilities in class AbstractFileSystem

Parameters:

capabilities - collections of Capabilities, can be immutable.

See Also:

AbstractFileSystem.addCapabilities(Collection)

close

public void close()

Description copied from class: AbstractFileSystem

Closes this component.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface VfsComponent

Overrides:

close in class AbstractFileSystem

See Also:

AbstractFileSystem.close()

createFile

protected FileObject createFile(AbstractFileName name)
                         throws Exception

Description copied from class: AbstractFileSystem

Creates a file object.

This method is called only if the requested file is not cached.

Specified by:

createFile in class AbstractFileSystem

Parameters:

name - name referencing the new file.

Returns:

new created FileObject.

Throws:

Exception - might throw an Exception, which is then wrapped in FileSystemException.

See Also:

AbstractFileSystem.createFile(AbstractFileName)

resolveFile

public FileObject resolveFile(FileName name)
                       throws FileSystemException

Resolve FileName into FileObject.

Specified by:

resolveFile in interface FileSystem

Overrides:

resolveFile in class AbstractFileSystem

Parameters:

name - The name of a file on the HdfsFileSystem.

Returns:

resolved FileObject.

Throws:

FileSystemException - if an error occurred.