org.apache.hadoop.fs.ftp

Class FTPFileSystem

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.fs.FileSystem

org.apache.hadoop.fs.ftp.FTPFileSystem

All Implemented Interfaces:

Closeable, AutoCloseable, Configurable

@InterfaceAudience.Public
 @InterfaceStability.Stable
public class FTPFileSystem
extends FileSystem

A FileSystem backed by an FTP client provided by Apache Commons Net.

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_BLOCK_SIZE
static int	DEFAULT_BUFFER_SIZE
static String	E_SAME_DIRECTORY_ONLY
static String	FS_FTP_DATA_CONNECTION_MODE
static String	FS_FTP_HOST
static String	FS_FTP_HOST_PORT
static String	FS_FTP_PASSWORD_PREFIX
static String	FS_FTP_TRANSFER_MODE
static String	FS_FTP_USER_PREFIX
static org.slf4j.Logger	LOG

Fields inherited from class org.apache.hadoop.fs.FileSystem

DEFAULT_FS, FS_DEFAULT_NAME_KEY, SHUTDOWN_HOOK_PRIORITY, statistics, TRASH_PREFIX, USER_HOME_PREFIX

Constructor Summary

Constructors

Constructor and Description
FTPFileSystem()

Method Summary

Modifier and Type	Method and Description
FSDataOutputStream	append(Path f, int bufferSize, Progressable progress) This optional operation is not yet supported.
FSDataOutputStream	create(Path file, FsPermission permission, boolean overwrite, int bufferSize, short replication, long blockSize, Progressable progress) A stream obtained via this call must be closed before using other APIs of this class or else the invocation will block.
boolean	delete(Path file, boolean recursive) Delete a file.
protected int	getDefaultPort() Get the default port for this FTPFileSystem.
FileStatus	getFileStatus(Path file) Return a file status object that represents the path.
Path	getHomeDirectory() Return the current user's home directory in this FileSystem.
String	getScheme() Return the protocol scheme for the FileSystem.
URI	getUri() Returns a URI which identifies this FileSystem.
Path	getWorkingDirectory() Get the current working directory for the given FileSystem
void	initialize(URI uri, Configuration conf) Initialize a FileSystem.
FileStatus[]	listStatus(Path file) List the statuses of the files/directories in the given path if the path is a directory.
boolean	mkdirs(Path file, FsPermission permission) Make the given file and all non-existent parents into directories.
FSDataInputStream	open(Path file, int bufferSize) Opens an FSDataInputStream at the indicated Path.
boolean	rename(Path src, Path dst) Renames Path src to Path dst.
void	setWorkingDirectory(Path newDir) Set the current working directory for the given FileSystem.

Methods inherited from class org.apache.hadoop.fs.FileSystem

addDelegationTokens, append, append, appendFile, areSymlinksEnabled, cancelDeleteOnExit, canonicalizeUri, checkPath, clearStatistics, close, closeAll, closeAllForUGI, completeLocalOutput, concat, copyFromLocalFile, copyFromLocalFile, copyFromLocalFile, copyFromLocalFile, copyToLocalFile, copyToLocalFile, copyToLocalFile, create, create, create, create, create, create, create, create, create, create, create, create, createFile, createNewFile, createNonRecursive, createNonRecursive, createNonRecursive, createPathHandle, createSnapshot, createSnapshot, createSymlink, delete, deleteOnExit, deleteSnapshot, enableSymlinks, exists, fixRelativePart, get, get, get, getAclStatus, getAllStatistics, getAllStoragePolicies, getBlockSize, getCanonicalServiceName, getCanonicalUri, getContentSummary, getDefaultBlockSize, getDefaultBlockSize, getDefaultReplication, getDefaultReplication, getDefaultUri, getFileBlockLocations, getFileBlockLocations, getFileChecksum, getFileChecksum, getFileLinkStatus, getFileSystemClass, getFSofPath, getGlobalStorageStatistics, getInitialWorkingDirectory, getLength, getLinkTarget, getLocal, getName, getNamed, getPathHandle, getQuotaUsage, getReplication, getServerDefaults, getServerDefaults, getStatistics, getStatistics, getStatus, getStatus, getStoragePolicy, getStorageStatistics, getTrashRoot, getTrashRoots, getUsed, getUsed, getXAttr, getXAttrs, getXAttrs, globStatus, globStatus, isDirectory, isFile, listCorruptFileBlocks, listFiles, listLocatedStatus, listLocatedStatus, listStatus, listStatus, listStatus, listStatusIterator, listXAttrs, makeQualified, mkdirs, mkdirs, modifyAclEntries, moveFromLocalFile, moveFromLocalFile, moveToLocalFile, newInstance, newInstance, newInstance, newInstanceLocal, open, open, open, primitiveCreate, primitiveMkdir, primitiveMkdir, printStatistics, processDeleteOnExit, removeAcl, removeAclEntries, removeDefaultAcl, removeXAttr, rename, renameSnapshot, resolveLink, resolvePath, setAcl, setDefaultUri, setDefaultUri, setOwner, setPermission, setReplication, setStoragePolicy, setTimes, setVerifyChecksum, setWriteChecksum, setXAttr, setXAttr, startLocalOutput, supportsSymlinks, truncate, unsetStoragePolicy

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.slf4j.Logger LOG

DEFAULT_BUFFER_SIZE

public static final int DEFAULT_BUFFER_SIZE

See Also:

Constant Field Values

DEFAULT_BLOCK_SIZE

public static final int DEFAULT_BLOCK_SIZE

See Also:

Constant Field Values

FS_FTP_USER_PREFIX

public static final String FS_FTP_USER_PREFIX

See Also:

Constant Field Values

FS_FTP_HOST

public static final String FS_FTP_HOST

See Also:

Constant Field Values

FS_FTP_HOST_PORT

public static final String FS_FTP_HOST_PORT

See Also:

Constant Field Values

FS_FTP_PASSWORD_PREFIX

public static final String FS_FTP_PASSWORD_PREFIX

See Also:

Constant Field Values

FS_FTP_DATA_CONNECTION_MODE

public static final String FS_FTP_DATA_CONNECTION_MODE

See Also:

Constant Field Values

FS_FTP_TRANSFER_MODE

public static final String FS_FTP_TRANSFER_MODE

See Also:

Constant Field Values

E_SAME_DIRECTORY_ONLY

public static final String E_SAME_DIRECTORY_ONLY

See Also:

Constant Field Values

Constructor Detail

FTPFileSystem

public FTPFileSystem()

Method Detail

getScheme

public String getScheme()

Return the protocol scheme for the FileSystem.

Overrides:

getScheme in class FileSystem

Returns:

ftp

getDefaultPort

protected int getDefaultPort()

Get the default port for this FTPFileSystem.

Overrides:

getDefaultPort in class FileSystem

Returns:

the default port

initialize

public void initialize(URI uri,
                       Configuration conf)
                throws IOException

Description copied from class: FileSystem

Initialize a FileSystem. Called after the new FileSystem instance is constructed, and before it is ready for use. FileSystem implementations overriding this method MUST forward it to their superclass, though the order in which it is done, and whether to alter the configuration before the invocation are options of the subclass.

Overrides:

initialize in class FileSystem

Parameters:

uri - a URI whose authority section names the host, port, etc. for this FileSystem

conf - the configuration

Throws:

IOException - on any failure to initialize this instance.

open

public FSDataInputStream open(Path file,
                              int bufferSize)
                       throws IOException

Description copied from class: FileSystem

Opens an FSDataInputStream at the indicated Path.

Specified by:

open in class FileSystem

Parameters:

file - the file name to open

bufferSize - the size of the buffer to be used.

Throws:

IOException - IO failure

create

public FSDataOutputStream create(Path file,
                                 FsPermission permission,
                                 boolean overwrite,
                                 int bufferSize,
                                 short replication,
                                 long blockSize,
                                 Progressable progress)
                          throws IOException

A stream obtained via this call must be closed before using other APIs of this class or else the invocation will block.

Specified by:

create in class FileSystem

Parameters:

file - the file name to open

permission - file permission

overwrite - if a file with this name already exists, then if true, the file will be overwritten, and if false an error will be thrown.

bufferSize - the size of the buffer to be used.

replication - required block replication for the file.

blockSize - block size

progress - the progress reporter

Throws:

IOException - IO failure

See Also:

FileSystem.setPermission(Path, FsPermission)

append

public FSDataOutputStream append(Path f,
                                 int bufferSize,
                                 Progressable progress)
                          throws IOException

This optional operation is not yet supported.

Specified by:

append in class FileSystem

Parameters:

f - the existing file to be appended.

bufferSize - the size of the buffer to be used.

progress - for reporting progress if it is not null.

Throws:

IOException - IO failure

delete

public boolean delete(Path file,
                      boolean recursive)
               throws IOException

Description copied from class: FileSystem

Delete a file.

Specified by:

delete in class FileSystem

Parameters:

file - the path to delete.

recursive - if path is a directory and set to true, the directory is deleted else throws an exception. In case of a file the recursive can be set to either true or false.

Returns:

true if delete is successful else false.

Throws:

IOException - IO failure

getUri

public URI getUri()

Description copied from class: FileSystem

Returns a URI which identifies this FileSystem.

Specified by:

getUri in class FileSystem

Returns:

the URI of this filesystem.

listStatus

public FileStatus[] listStatus(Path file)
                        throws IOException

Description copied from class: FileSystem

List the statuses of the files/directories in the given path if the path is a directory.

Does not guarantee to return the List of files/directories status in a sorted order.

Will not return null. Expect IOException upon access error.

Specified by:

listStatus in class FileSystem

Parameters:

file - given path

Returns:

the statuses of the files/directories in the given patch

Throws:

FileNotFoundException - when the path does not exist

IOException - see specific implementation

getFileStatus

public FileStatus getFileStatus(Path file)
                         throws IOException

Description copied from class: FileSystem

Return a file status object that represents the path.

Specified by:

getFileStatus in class FileSystem

Parameters:

file - The path we want information from

Returns:

a FileStatus object

Throws:

FileNotFoundException - when the path does not exist

IOException - see specific implementation

mkdirs

public boolean mkdirs(Path file,
                      FsPermission permission)
               throws IOException

Description copied from class: FileSystem

Make the given file and all non-existent parents into directories. Has roughly the semantics of Unix @{code mkdir -p}. Existence of the directory hierarchy is not an error.

Specified by:

mkdirs in class FileSystem

Parameters:

file - path to create

permission - to apply to f

Throws:

IOException - IO failure

rename

public boolean rename(Path src,
                      Path dst)
               throws IOException

Description copied from class: FileSystem

Renames Path src to Path dst.

Specified by:

rename in class FileSystem

Parameters:

src - path to be renamed

dst - new path after rename

Returns:

true if rename is successful

Throws:

IOException - on failure

getWorkingDirectory

public Path getWorkingDirectory()

Description copied from class: FileSystem

Get the current working directory for the given FileSystem

Specified by:

getWorkingDirectory in class FileSystem

Returns:

the directory pathname

getHomeDirectory

public Path getHomeDirectory()

Description copied from class: FileSystem

Return the current user's home directory in this FileSystem. The default implementation returns "/user/$USER/".

Overrides:

getHomeDirectory in class FileSystem

setWorkingDirectory

public void setWorkingDirectory(Path newDir)

Description copied from class: FileSystem

Set the current working directory for the given FileSystem. All relative paths will be resolved relative to it.

Specified by:

setWorkingDirectory in class FileSystem

Parameters:

newDir - Path of new working directory