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java.lang.Object org.apache.hadoop.conf.Configured org.apache.hadoop.fs.FileSystem org.apache.hadoop.fs.RawLocalFileSystem
public class RawLocalFileSystem
Implement the FileSystem API for the raw local filesystem.
Field Summary |
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Fields inherited from class org.apache.hadoop.fs.FileSystem |
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LOG |
Constructor Summary | |
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RawLocalFileSystem()
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Method Summary | |
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void |
close()
No more filesystem operations are needed. |
void |
completeLocalOutput(Path fsWorkingFile,
Path tmpLocalFile)
Called when we're all done writing to the target. |
void |
copyFromLocalFile(boolean delSrc,
Path src,
Path dst)
The src file is on the local disk. |
void |
copyToLocalFile(boolean delSrc,
Path src,
Path dst)
The src file is under FS, and the dst is on the local disk. |
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 p)
Delete a file |
boolean |
exists(Path f)
Check if exists. |
long |
getBlockSize(Path filename)
Get the block size for a particular file. |
short |
getDefaultReplication()
Get the default replication. |
String[][] |
getFileCacheHints(Path f,
long start,
long len)
Return 1x1 'localhost' cell if the file exists. |
long |
getLength(Path f)
The number of bytes in a file. |
String |
getName()
Deprecated. |
short |
getReplication(Path f)
Replication is not supported for the local file system. |
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. |
boolean |
isDirectory(Path f)
True iff the named path is a directory. |
Path[] |
listPaths(Path f)
List files in a directory. |
void |
lock(Path p,
boolean shared)
Deprecated. |
boolean |
mkdirs(Path f)
Creates the specified directory hierarchy. |
void |
moveFromLocalFile(Path src,
Path dst)
The src file is on the local disk. |
FSDataInputStream |
open(Path f,
int bufferSize)
Opens an FSDataInputStream at the indicated Path. |
File |
pathToFile(Path path)
Convert a path to a File. |
void |
release(Path p)
Deprecated. |
boolean |
rename(Path src,
Path dst)
Renames Path src to Path dst. |
boolean |
setReplication(Path src,
short replication)
Set the replication of the given file |
void |
setWorkingDirectory(Path newDir)
Set the working directory to the given directory. |
Path |
startLocalOutput(Path fsOutputFile,
Path tmpLocalFile)
Returns a local File that the user can write output to. |
String |
toString()
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Methods inherited from class org.apache.hadoop.fs.FileSystem |
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checkPath, closeAll, copyFromLocalFile, copyToLocalFile, create, create, create, create, create, create, create, createNewFile, get, get, getContentLength, getDefaultBlockSize, getLocal, getNamed, getUsed, globPaths, globPaths, isFile, listPaths, listPaths, listPaths, makeQualified, moveToLocalFile, open, parseArgs |
Methods inherited from class org.apache.hadoop.conf.Configured |
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getConf, setConf |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public RawLocalFileSystem()
Method Detail |
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public File pathToFile(Path path)
public String[][] getFileCacheHints(Path f, long start, long len) throws IOException
getFileCacheHints
in class FileSystem
IOException
public String getName()
getName
in class FileSystem
public URI getUri()
FileSystem
getUri
in class FileSystem
public void initialize(URI uri, Configuration conf)
FileSystem
initialize
in class FileSystem
uri
- a uri whose authority section names the host, port, etc.
for this FileSystemconf
- the configurationpublic FSDataInputStream open(Path f, int bufferSize) throws IOException
FileSystem
open
in class FileSystem
f
- the file name to openbufferSize
- the size of the buffer to be used.
IOException
public FSDataOutputStream create(Path f, boolean overwrite, int bufferSize, short replication, long blockSize, Progressable progress) throws IOException
FileSystem
create
in class FileSystem
f
- the file name to openoverwrite
- 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.
IOException
public short getReplication(Path f) throws IOException
getReplication
in class FileSystem
f
- file name
IOException
public boolean setReplication(Path src, short replication) throws IOException
setReplication
in class FileSystem
src
- file namereplication
- new replication
IOException
public boolean rename(Path src, Path dst) throws IOException
FileSystem
rename
in class FileSystem
IOException
public boolean delete(Path p) throws IOException
FileSystem
delete
in class FileSystem
IOException
public boolean exists(Path f) throws IOException
FileSystem
exists
in class FileSystem
f
- source file
IOException
public boolean isDirectory(Path f) throws IOException
FileSystem
isDirectory
in class FileSystem
IOException
public long getLength(Path f) throws IOException
FileSystem
getLength
in class FileSystem
IOException
public Path[] listPaths(Path f) throws IOException
FileSystem
listPaths
in class FileSystem
IOException
public boolean mkdirs(Path f) throws IOException
mkdirs
in class FileSystem
IOException
public void setWorkingDirectory(Path newDir)
setWorkingDirectory
in class FileSystem
public Path getWorkingDirectory()
FileSystem
getWorkingDirectory
in class FileSystem
@Deprecated public void lock(Path p, boolean shared) throws IOException
FileSystem
lock
in class FileSystem
IOException
@Deprecated public void release(Path p) throws IOException
FileSystem
release
in class FileSystem
IOException
public void moveFromLocalFile(Path src, Path dst) throws IOException
FileSystem
moveFromLocalFile
in class FileSystem
IOException
public void copyFromLocalFile(boolean delSrc, Path src, Path dst) throws IOException
FileSystem
copyFromLocalFile
in class FileSystem
IOException
public void copyToLocalFile(boolean delSrc, Path src, Path dst) throws IOException
FileSystem
copyToLocalFile
in class FileSystem
IOException
public Path startLocalOutput(Path fsOutputFile, Path tmpLocalFile) throws IOException
FileSystem
startLocalOutput
in class FileSystem
IOException
public void completeLocalOutput(Path fsWorkingFile, Path tmpLocalFile) throws IOException
FileSystem
completeLocalOutput
in class FileSystem
IOException
public void close() throws IOException
FileSystem
close
in class FileSystem
IOException
public String toString()
toString
in class Object
public long getBlockSize(Path filename)
FileSystem
getBlockSize
in class FileSystem
filename
- the filename
public short getDefaultReplication()
FileSystem
getDefaultReplication
in class FileSystem
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