org.apache.hadoop.fs.ftp

类 FTPFileSystem

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.fs.FileSystem

org.apache.hadoop.fs.ftp.FTPFileSystem

所有已实现的接口:

Closeable, AutoCloseable, Configurable

public class FTPFileSystem
extends FileSystem

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

嵌套类概要

从类继承的嵌套类/接口 org.apache.hadoop.fs.FileSystem

FileSystem.Statistics

字段概要

字段

限定符和类型	字段和说明
static int	DEFAULT_BLOCK_SIZE
static int	DEFAULT_BUFFER_SIZE
static org.apache.commons.logging.Log	LOG

从类继承的字段 org.apache.hadoop.fs.FileSystem

FS_DEFAULT_NAME_KEY, statistics

构造器概要

构造器

构造器和说明
FTPFileSystem()

方法概要

方法

限定符和类型	方法和说明
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) 已过时。 Use delete(Path, boolean) instead
boolean	delete(Path file, boolean recursive) Delete a file.
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.
URI	getUri() Returns a URI whose scheme and authority identify this FileSystem.
Path	getWorkingDirectory() Get the current working directory for the given file system
void	initialize(URI uri, Configuration conf) Called after a new FileSystem instance is constructed.
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 file system.

从类继承的方法 org.apache.hadoop.fs.FileSystem

addFileSystemForTesting, append, append, checkPath, clearStatistics, close, closeAll, closeAllForUGI, completeLocalOutput, concat, copyFromLocalFile, copyFromLocalFile, copyFromLocalFile, copyFromLocalFile, copyToLocalFile, copyToLocalFile, create, create, create, create, create, create, create, create, create, create, createNewFile, createNonRecursive, createNonRecursive, deleteOnExit, exists, get, get, get, getAllStatistics, getBlockSize, getCacheSize, getCanonicalServiceName, getCanonicalUri, getContentSummary, getDefaultBlockSize, getDefaultBlockSize, getDefaultPort, getDefaultReplication, getDefaultReplication, getDefaultUri, getDelegationToken, getFileBlockLocations, getFileChecksum, getLength, getLocal, getName, getNamed, getReplication, getStatistics, getStatistics, getUsed, globStatus, globStatus, isDirectory, isFile, listStatus, listStatus, listStatus, makeQualified, mkdirs, mkdirs, moveFromLocalFile, moveFromLocalFile, moveToLocalFile, open, printStatistics, processDeleteOnExit, setDefaultUri, setDefaultUri, setOwner, setPermission, setReplication, setTimes, setVerifyChecksum, startLocalOutput

从类继承的方法 org.apache.hadoop.conf.Configured

getConf, setConf

从类继承的方法 java.lang.Object

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

字段详细资料

LOG

public static final org.apache.commons.logging.Log LOG

DEFAULT_BUFFER_SIZE

public static final int DEFAULT_BUFFER_SIZE

另请参阅:

常量字段值

DEFAULT_BLOCK_SIZE

public static final int DEFAULT_BLOCK_SIZE

另请参阅:

常量字段值

构造器详细资料

FTPFileSystem

public FTPFileSystem()

方法详细资料

initialize

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

从类复制的说明: FileSystem

Called after a new FileSystem instance is constructed.

覆盖:

initialize 在类中 FileSystem

参数:

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

conf - the configuration

抛出:

IOException

open

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

从类复制的说明: FileSystem

Opens an FSDataInputStream at the indicated Path.

指定者:

open 在类中 FileSystem

参数:

file - the file name to open

bufferSize - the size of the buffer to be used.

抛出:

IOException

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.

指定者:

create 在类中 FileSystem

参数:

file - the file name to open

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.

抛出:

IOException

另请参阅:

FileSystem.setPermission(Path, FsPermission)

append

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

This optional operation is not yet supported.

指定者:

append 在类中 FileSystem

参数:

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.

抛出:

IOException

delete

@Deprecated
public boolean delete(Path file)
               throws IOException

已过时。 Use delete(Path, boolean) instead

指定者:

delete 在类中 FileSystem

抛出:

IOException

delete

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

从类复制的说明: FileSystem

Delete a file.

指定者:

delete 在类中 FileSystem

参数:

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.

返回:

true if delete is successful else false.

抛出:

IOException

getUri

public URI getUri()

从类复制的说明: FileSystem

Returns a URI whose scheme and authority identify this FileSystem.

指定者:

getUri 在类中 FileSystem

listStatus

public FileStatus[] listStatus(Path file)
                        throws IOException

从类复制的说明: FileSystem

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

指定者:

listStatus 在类中 FileSystem

参数:

file - given path

返回:

the statuses of the files/directories in the given patch returns null, if Path f does not exist in the FileSystem

抛出:

IOException

getFileStatus

public FileStatus getFileStatus(Path file)
                         throws IOException

从类复制的说明: FileSystem

Return a file status object that represents the path.

指定者:

getFileStatus 在类中 FileSystem

参数:

file - The path we want information from

返回:

a FileStatus object

抛出:

FileNotFoundException - when the path does not exist; IOException see specific implementation

IOException

mkdirs

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

从类复制的说明: FileSystem

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

指定者:

mkdirs 在类中 FileSystem

抛出:

IOException

rename

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

从类复制的说明: FileSystem

Renames Path src to Path dst. Can take place on local fs or remote DFS.

指定者:

rename 在类中 FileSystem

抛出:

IOException

getWorkingDirectory

public Path getWorkingDirectory()

从类复制的说明: FileSystem

Get the current working directory for the given file system

指定者:

getWorkingDirectory 在类中 FileSystem

返回:

the directory pathname

getHomeDirectory

public Path getHomeDirectory()

从类复制的说明: FileSystem

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

覆盖:

getHomeDirectory 在类中 FileSystem

setWorkingDirectory

public void setWorkingDirectory(Path newDir)

从类复制的说明: FileSystem

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

指定者:

setWorkingDirectory 在类中 FileSystem