org.apache.hadoop.dfs
Class HftpFileSystem

java.lang.Object
  org.apache.hadoop.conf.Configured
      org.apache.hadoop.fs.FileSystem
          org.apache.hadoop.dfs.HftpFileSystem

All Implemented Interfaces:

Configurable

public class HftpFileSystem
extends FileSystem

An implementation of a protocol for accessing filesystems over HTTP. The following implementation provides a limited, read-only interface to a filesystem over HTTP.

See Also:

ListPathsServlet, FileDataServlet

Field Summary

protected static SimpleDateFormat

df

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

LOG

Constructor Summary

HftpFileSystem()

Method Summary

FSDataOutputStream	create(Path f, boolean overwrite, int bufferSize, short replication, long blockSize, Progressable progress) Opens an FSDataOutputStream at the indicated Path with write-progress reporting.
boolean	delete(Path f) Delete a file
boolean	exists(Path f) Check if exists.
FileStatus	getFileStatus(Path f)
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 name, Configuration conf) Called after a new FileSystem instance is constructed.
FileStatus[]	listStatus(Path f)
boolean	mkdirs(Path f) Make the given file and all non-existent parents into directories.
FSDataInputStream	open(Path f, int buffersize) Opens an FSDataInputStream at the indicated Path.
boolean	rename(Path src, Path dst) Renames Path src to Path dst.
void	setWorkingDirectory(Path f) Set the current working directory for the given file system.

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

checkPath, close, closeAll, completeLocalOutput, copyFromLocalFile, copyFromLocalFile, copyFromLocalFile, copyToLocalFile, copyToLocalFile, create, create, create, create, create, create, create, create, createNewFile, get, get, getBlockSize, getContentLength, getDefaultBlockSize, getDefaultReplication, getFileCacheHints, getLength, getLocal, getName, getNamed, getReplication, getUsed, globPaths, globPaths, isDirectory, isFile, listPaths, listPaths, listPaths, listPaths, makeQualified, moveFromLocalFile, moveToLocalFile, open, parseArgs, setReplication, startLocalOutput

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

df

protected static final SimpleDateFormat df

Constructor Detail

HftpFileSystem

public HftpFileSystem()

Method Detail

initialize

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

Description copied from class: FileSystem

Called after a new FileSystem instance is constructed.

Specified by:

initialize in class FileSystem

Parameters:

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

conf - the configuration

Throws:

IOException

getUri

public URI getUri()

Description copied from class: FileSystem

Returns a URI whose scheme and authority identify this FileSystem.

Specified by:

getUri in class FileSystem

open

public FSDataInputStream open(Path f,
                              int buffersize)
                       throws IOException

Description copied from class: FileSystem

Opens an FSDataInputStream at the indicated Path.

Specified by:

open in class FileSystem

Parameters:

f - the file name to open

buffersize - the size of the buffer to be used.

Throws:

IOException

exists

public boolean exists(Path f)
               throws IOException

Description copied from class: FileSystem

Check if exists.

Specified by:

exists in class FileSystem

Parameters:

f - source file

Throws:

IOException

listStatus

public FileStatus[] listStatus(Path f)
                        throws IOException

Specified by:

listStatus in class FileSystem

Throws:

IOException

getFileStatus

public FileStatus getFileStatus(Path f)
                         throws IOException

Specified by:

getFileStatus in class FileSystem

Throws:

IOException

getWorkingDirectory

public Path getWorkingDirectory()

Description copied from class: FileSystem

Get the current working directory for the given file system

Specified by:

getWorkingDirectory in class FileSystem

Returns:

the directory pathname

setWorkingDirectory

public void setWorkingDirectory(Path f)

Description copied from class: FileSystem

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

Specified by:

setWorkingDirectory in class FileSystem

create

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

Description copied from class: FileSystem

Opens an FSDataOutputStream at the indicated Path with write-progress reporting.

Specified by:

create in class FileSystem

Parameters:

f - 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.

Throws:

IOException

rename

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

Description copied from class: FileSystem

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

Specified by:

rename in class FileSystem

Throws:

IOException

delete

public boolean delete(Path f)
               throws IOException

Description copied from class: FileSystem

Delete a file

Specified by:

delete in class FileSystem

Throws:

IOException

mkdirs

public boolean mkdirs(Path f)
               throws IOException

Description copied from class: 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.

Specified by:

mkdirs in class FileSystem

Throws:

IOException