Package org.apache.hadoop.fs

An abstract file system API.

See:
Description

Interface Summary

FsConstants	FileSystem related constants.
PathFilter
PositionedReadable	Stream that permits positional reading.
RemoteIterator<E>	An iterator over a collection whose elements need to be fetched remotely
Seekable	Stream that permits seeking.
Syncable	This interface for flush/sync operation.

Class Summary

AbstractFileSystem	This class provides an interface for implementors of a Hadoop file system (analogous to the VFS of Unix).
AvroFSInput	Adapts an FSDataInputStream to Avro's SeekableInput interface.
BlockLocation
ChecksumFileSystem	Abstract Checksumed FileSystem.
CommonConfigurationKeysPublic	This class contains constants for configuration keys used in the common code.
ContentSummary	Store the summary of a content (a directory or a file).
FileChecksum	An abstract class representing file checksums for files.
FileContext	The FileContext class provides an interface to the application writer for using the Hadoop file system.
FileStatus	Interface that represents the client side information for a file.
FileSystem	An abstract base class for a fairly generic filesystem.
FileSystem.Statistics
FileUtil	A collection of file-processing util methods
FileUtil.HardLink	Deprecated. Use HardLink
FilterFileSystem	A FilterFileSystem contains some other file system, which it uses as its basic file system, possibly transforming the data along the way or providing additional functionality.
FSDataInputStream	Utility that wraps a FSInputStream in a DataInputStream and buffers input through a BufferedInputStream.
FSDataOutputStream	Utility that wraps a OutputStream in a DataOutputStream, buffers output through a BufferedOutputStream and creates a checksum file.
FsServerDefaults	Provides server default configuration values to clients.
FsShellPermissions.Chgrp	Used to change group of files
FsShellPermissions.Chmod	The pattern is almost as flexible as mode allowed by chmod shell command.
FsShellPermissions.Chown	Used to change owner and/or group of files
FsStatus	This class is used to represent the capacity, free and used space on a FileSystem.
GlobFilter	A filter for POSIX glob pattern with brace expansions.
HardLink	Class for creating hardlinks.
HardLink.LinkStats	HardLink statistics counters and methods.
HarFileSystem	This is an implementation of the Hadoop Archive Filesystem.
LocalFileSystem	Implement the FileSystem API for the checksumed local filesystem.
LocatedFileStatus	This class defines a FileStatus that includes a file's block locations.
Options	This class contains options related to file system operations.
Options.CreateOpts	Class to support the varargs for create() options.
Options.CreateOpts.BlockSize
Options.CreateOpts.BufferSize
Options.CreateOpts.BytesPerChecksum
Options.CreateOpts.CreateParent
Options.CreateOpts.Perms
Options.CreateOpts.Progress
Options.CreateOpts.ReplicationFactor
Path	Names a file or directory in a FileSystem.
RawLocalFileSystem	Implement the FileSystem API for the raw local filesystem.
Trash	Provides a trash facility which supports pluggable Trash policies.
TrashPolicy	This interface is used for implementing different Trash policies.

Enum Summary

CreateFlag	CreateFlag specifies the file create semantic.
HardLink.OSType
Options.Rename	Enum to support the varargs for rename() options

Exception Summary

ChecksumException	Thrown for checksum errors.
FileAlreadyExistsException	Used when target file already exists for any operation and is not configured to be overwritten.
InvalidPathException	Path string is invalid either because it has invalid characters or due to other file system specific reasons.
ParentNotDirectoryException	Indicates that the parent of specified Path is not a directory as expected.
UnsupportedFileSystemException	File system for a given file system name/scheme is not supported

Error Summary

FSError

Thrown for unexpected filesystem errors, presumed to reflect disk errors in the native filesystem.

Package org.apache.hadoop.fs Description

An abstract file system API.