RawLocalFileSystem (Apache Hadoop Main 3.0.0-alpha2-SNAPSHOT API)

java.lang.Object
- org.apache.hadoop.conf.Configured
- - org.apache.hadoop.fs.FileSystem
  - - org.apache.hadoop.fs.RawLocalFileSystem

すべての実装されたインタフェース:

Closeable, AutoCloseable, Configurable
```
@InterfaceAudience.Public
 @InterfaceStability.Stable
public class RawLocalFileSystem
extends FileSystem
```
Implement the FileSystem API for the raw local filesystem.

フィールドのサマリー
- クラスから継承されたフィールド org.apache.hadoop.fs.FileSystem
  DEFAULT_FS, FS_DEFAULT_NAME_KEY, LOG, SHUTDOWN_HOOK_PRIORITY, statistics, TRASH_PREFIX

コンストラクタのサマリー

コンストラクタ
コンストラクタと説明

RawLocalFileSystem()

コンストラクタ
コンストラクタと説明
`RawLocalFileSystem()`

メソッドのサマリー

すべてのメソッド staticメソッドインスタンス・メソッド concreteメソッド
修飾子とタイプ	メソッドと説明
`FSDataOutputStream`	`append(Path f, int bufferSize, Progressable progress)` Append to an existing file (optional operation).
`void`	`close()` No more filesystem operations are needed.
`void`	`completeLocalOutput(Path fsWorkingFile, Path tmpLocalFile)` Called when we're all done writing to the target.
`FSDataOutputStream`	`create(Path f, boolean overwrite, int bufferSize, short replication, long blockSize, Progressable progress)` Create an FSDataOutputStream at the indicated Path with write-progress reporting.
`FSDataOutputStream`	`create(Path f, FsPermission permission, boolean overwrite, int bufferSize, short replication, long blockSize, Progressable progress)` Create an FSDataOutputStream at the indicated Path with write-progress reporting.
`FSDataOutputStream`	`createNonRecursive(Path f, FsPermission permission, boolean overwrite, int bufferSize, short replication, long blockSize, Progressable progress)` Opens an FSDataOutputStream at the indicated Path with write-progress reporting.
`FSDataOutputStream`	`createNonRecursive(Path f, FsPermission permission, EnumSet<CreateFlag> flags, int bufferSize, short replication, long blockSize, Progressable progress)` Opens an FSDataOutputStream at the indicated Path with write-progress reporting.
`protected OutputStream`	`createOutputStream(Path f, boolean append)`
`protected OutputStream`	`createOutputStreamWithMode(Path f, boolean append, FsPermission permission)`
`void`	`createSymlink(Path target, Path link, boolean createParent)` See `FileContext.createSymlink(Path, Path, boolean)`
`boolean`	`delete(Path p, boolean recursive)` Delete the given path to a file or directory.
`FileStatus`	`getFileLinkStatus(Path f)` Return a FileStatus representing the given path.
`FileStatus`	`getFileStatus(Path f)` Return a file status object that represents the path.
`Path`	`getHomeDirectory()` Return the current user's home directory in this filesystem.
`protected Path`	`getInitialWorkingDirectory()` Note: with the new FilesContext class, getWorkingDirectory() will be removed.
`Path`	`getLinkTarget(Path f)` See `FileContext.getLinkTarget(Path)`
`FsStatus`	`getStatus(Path p)` Returns a status object describing the use and capacity of the 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
`boolean`	`handleEmptyDstDirectoryOnWindows(Path src, File srcFile, Path dst, File dstFile)`
`void`	`initialize(URI uri, Configuration conf)` Called after a new FileSystem instance is constructed.
`FileStatus[]`	`listStatus(Path f)` List the statuses of the files/directories in the given path if the path is a directory.
`boolean`	`mkdirs(Path f)` Creates the specified directory hierarchy.
`boolean`	`mkdirs(Path f, FsPermission permission)` Make the given file and all non-existent parents into directories.
`protected boolean`	`mkOneDir(File p2f)`
`protected boolean`	`mkOneDirWithMode(Path p, File p2f, FsPermission permission)`
`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.
`boolean`	`rename(Path src, Path dst)` Renames Path src to Path dst.
`void`	`setOwner(Path p, String username, String groupname)` Use the command chown to set owner.
`void`	`setPermission(Path p, FsPermission permission)` Use the command chmod to set permission.
`void`	`setTimes(Path p, long mtime, long atime)` Sets the `Path`'s last modified time and last access time to the given valid times.
`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.
`boolean`	`supportsSymlinks()` See `AbstractFileSystem.supportsSymlinks()`
`String`	`toString()`
`boolean`	`truncate(Path f, long newLength)` Truncate the file in the indicated path to the indicated size.
`static void`	`useStatIfAvailable()`

クラスから継承されたメソッド org.apache.hadoop.fs.FileSystem
append, append, areSymlinksEnabled, cancelDeleteOnExit, canonicalizeUri, checkPath, clearStatistics, closeAll, closeAllForUGI, concat, copyFromLocalFile, copyFromLocalFile, copyFromLocalFile, copyFromLocalFile, copyToLocalFile, copyToLocalFile, copyToLocalFile, create, create, create, create, create, create, create, create, create, create, create, createNewFile, createNonRecursive, createSnapshot, createSnapshot, delete, deleteOnExit, deleteSnapshot, enableSymlinks, exists, fixRelativePart, get, get, get, getAclStatus, getAllStatistics, getAllStoragePolicies, getBlockSize, getCanonicalUri, getContentSummary, getDefaultBlockSize, getDefaultBlockSize, getDefaultPort, getDefaultReplication, getDefaultReplication, getDefaultUri, getFileBlockLocations, getFileBlockLocations, getFileChecksum, getFileChecksum, getFileSystemClass, getFSofPath, getGlobalStorageStatistics, getLength, getLocal, getName, getNamed, getQuotaUsage, getReplication, getScheme, getServerDefaults, getServerDefaults, getStatistics, getStatistics, 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, modifyAclEntries, moveFromLocalFile, moveToLocalFile, newInstance, newInstance, newInstance, newInstanceLocal, open, primitiveCreate, primitiveMkdir, primitiveMkdir, printStatistics, processDeleteOnExit, removeAcl, removeAclEntries, removeDefaultAcl, removeXAttr, rename, renameSnapshot, resolveLink, resolvePath, setAcl, setDefaultUri, setDefaultUri, setReplication, setStoragePolicy, setVerifyChecksum, setWriteChecksum, setXAttr, setXAttr, unsetStoragePolicy

クラスから継承されたメソッド org.apache.hadoop.conf.Configured
getConf, setConf

クラスから継承されたメソッド java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- コンストラクタの詳細
  - RawLocalFileSystem
```
public RawLocalFileSystem()
```
- メソッドの詳細
  - useStatIfAvailable
```
public static void useStatIfAvailable()
```
  - pathToFile
```
public File pathToFile(Path path)
```
    Convert a path to a File.
  - getUri
```
public URI getUri()
```
    クラスからコピーされた説明: FileSystem
    
    Returns a URI whose scheme and authority identify this FileSystem.
    
    定義:
    
    getUri クラス内 FileSystem
  - initialize
```
public void initialize(URI uri,
                       Configuration conf)
                throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Called after a new FileSystem instance is constructed.
    
    オーバーライド:
    
    initialize クラス内 FileSystem
    
    パラメータ:
    
    uri - a uri whose authority section names the host, port, etc. for this FileSystem
    
    conf - the configuration
    
    例外:
    
    IOException
  - open
```
public FSDataInputStream open(Path f,
                              int bufferSize)
                       throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Opens an FSDataInputStream at the indicated Path.
    
    定義:
    
    open クラス内 FileSystem
    
    パラメータ:
    
    f - the file name to open
    
    bufferSize - the size of the buffer to be used.
    
    例外:
    
    IOException
  - append
```
public FSDataOutputStream append(Path f,
                                 int bufferSize,
                                 Progressable progress)
                          throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Append to an existing file (optional operation).
    
    定義:
    
    append クラス内 FileSystem
    
    パラメータ:
    
    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.
    
    例外:
    
    IOException
  - create
```
public FSDataOutputStream create(Path f,
                                 boolean overwrite,
                                 int bufferSize,
                                 short replication,
                                 long blockSize,
                                 Progressable progress)
                          throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Create an FSDataOutputStream at the indicated Path with write-progress reporting.
    
    オーバーライド:
    
    create クラス内 FileSystem
    
    パラメータ:
    
    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.
    
    例外:
    
    IOException
  - createOutputStream
```
protected OutputStream createOutputStream(Path f,
                                          boolean append)
                                   throws IOException
```
    例外:
    
    IOException
  - createOutputStreamWithMode
```
protected OutputStream createOutputStreamWithMode(Path f,
                                                  boolean append,
                                                  FsPermission permission)
                                           throws IOException
```
    例外:
    
    IOException
  - createNonRecursive
```
public FSDataOutputStream createNonRecursive(Path f,
                                             FsPermission permission,
                                             EnumSet<CreateFlag> flags,
                                             int bufferSize,
                                             short replication,
                                             long blockSize,
                                             Progressable progress)
                                      throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Opens an FSDataOutputStream at the indicated Path with write-progress reporting. Same as create(), except fails if parent directory doesn't already exist.
    
    オーバーライド:
    
    createNonRecursive クラス内 FileSystem
    
    パラメータ:
    
    f - the file name to open
    
    permission - file permission
    
    flags - CreateFlags to use for this stream.
    
    bufferSize - the size of the buffer to be used.
    
    replication - required block replication for the file.
    
    blockSize - block size
    
    progress - the progress reporter
    
    例外:
    
    IOException
    
    関連項目:
    
    FileSystem.setPermission(Path, FsPermission)
  - create
```
public FSDataOutputStream create(Path f,
                                 FsPermission permission,
                                 boolean overwrite,
                                 int bufferSize,
                                 short replication,
                                 long blockSize,
                                 Progressable progress)
                          throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Create an FSDataOutputStream at the indicated Path with write-progress reporting.
    
    定義:
    
    create クラス内 FileSystem
    
    パラメータ:
    
    f - 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
    
    例外:
    
    IOException
    
    関連項目:
    
    FileSystem.setPermission(Path, FsPermission)
  - createNonRecursive
```
public FSDataOutputStream createNonRecursive(Path f,
                                             FsPermission permission,
                                             boolean overwrite,
                                             int bufferSize,
                                             short replication,
                                             long blockSize,
                                             Progressable progress)
                                      throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Opens an FSDataOutputStream at the indicated Path with write-progress reporting. Same as create(), except fails if parent directory doesn't already exist.
    
    オーバーライド:
    
    createNonRecursive クラス内 FileSystem
    
    パラメータ:
    
    f - 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
    
    例外:
    
    IOException
    
    関連項目:
    
    FileSystem.setPermission(Path, FsPermission)
  - rename
```
public boolean rename(Path src,
                      Path dst)
               throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Renames Path src to Path dst. Can take place on local fs or remote DFS.
    
    定義:
    
    rename クラス内 FileSystem
    
    パラメータ:
    
    src - path to be renamed
    
    dst - new path after rename
    
    戻り値:
    
    true if rename is successful
    
    例外:
    
    IOException - on failure
  - handleEmptyDstDirectoryOnWindows
```
public final boolean handleEmptyDstDirectoryOnWindows(Path src,
                                                      File srcFile,
                                                      Path dst,
                                                      File dstFile)
                                               throws IOException
```
    例外:
    
    IOException
  - truncate
```
public boolean truncate(Path f,
                        long newLength)
                 throws IOException
```
    クラスからコピーされた説明: FileSystem
    Truncate the file in the indicated path to the indicated size.
    - Fails if path is a directory.
    - Fails if path does not exist.
    - Fails if path is not closed.
    - Fails if new size is greater than current size.
    オーバーライド:
    
    truncate クラス内 FileSystem
    
    パラメータ:
    
    f - The path to the file to be truncated
    
    newLength - The size the file is to be truncated to
    
    戻り値:
    
    true if the file has been truncated to the desired newLength and is immediately available to be reused for write operations such as append, or false if a background process of adjusting the length of the last block has been started, and clients should wait for it to complete before proceeding with further file updates.
    
    例外:
    
    IOException
  - delete
```
public boolean delete(Path p,
                      boolean recursive)
               throws IOException
```
    Delete the given path to a file or directory.
    
    定義:
    
    delete クラス内 FileSystem
    
    パラメータ:
    
    p - the path to delete
    
    recursive - to delete sub-directories
    
    戻り値:
    
    true if the file or directory and all its contents were deleted
    
    例外:
    
    IOException - if p is non-empty and recursive is false
  - listStatus
```
public FileStatus[] listStatus(Path f)
                        throws IOException
```
    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. (Note: Returned list is not sorted in any given order, due to reliance on Java's File.list() API.)
    
    定義:
    
    listStatus クラス内 FileSystem
    
    パラメータ:
    
    f - given path
    
    戻り値:
    
    the statuses of the files/directories in the given patch
    
    例外:
    
    FileNotFoundException - when the path does not exist; IOException see specific implementation
    
    IOException
  - mkOneDir
```
protected boolean mkOneDir(File p2f)
                    throws IOException
```
    例外:
    
    IOException
  - mkOneDirWithMode
```
protected boolean mkOneDirWithMode(Path p,
                                   File p2f,
                                   FsPermission permission)
                            throws IOException
```
    例外:
    
    IOException
  - mkdirs
```
public boolean mkdirs(Path f)
               throws IOException
```
    Creates the specified directory hierarchy. Does not treat existence as an error.
    
    オーバーライド:
    
    mkdirs クラス内 FileSystem
    
    例外:
    
    IOException
  - mkdirs
```
public boolean mkdirs(Path f,
                      FsPermission permission)
               throws IOException
```
    クラスからコピーされた説明: 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.
    
    定義:
    
    mkdirs クラス内 FileSystem
    
    パラメータ:
    
    f - path to create
    
    permission - to apply to f
    
    例外:
    
    IOException
  - getHomeDirectory
```
public Path getHomeDirectory()
```
    クラスからコピーされた説明: FileSystem
    
    Return the current user's home directory in this filesystem. The default implementation returns "/user/$USER/".
    
    オーバーライド:
    
    getHomeDirectory クラス内 FileSystem
  - setWorkingDirectory
```
public void setWorkingDirectory(Path newDir)
```
    Set the working directory to the given directory.
    
    定義:
    
    setWorkingDirectory クラス内 FileSystem
    
    パラメータ:
    
    newDir - Path of new working directory
  - getWorkingDirectory
```
public Path getWorkingDirectory()
```
    クラスからコピーされた説明: FileSystem
    
    Get the current working directory for the given file system
    
    定義:
    
    getWorkingDirectory クラス内 FileSystem
    
    戻り値:
    
    the directory pathname
  - getInitialWorkingDirectory
```
protected Path getInitialWorkingDirectory()
```
    クラスからコピーされた説明: FileSystem
    
    Note: with the new FilesContext class, getWorkingDirectory() will be removed. The working directory is implemented in FilesContext. Some file systems like LocalFileSystem have an initial workingDir that we use as the starting workingDir. For other file systems like HDFS there is no built in notion of an initial workingDir.
    
    オーバーライド:
    
    getInitialWorkingDirectory クラス内 FileSystem
    
    戻り値:
    
    if there is built in notion of workingDir then it is returned; else a null is returned.
  - getStatus
```
public FsStatus getStatus(Path p)
                   throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Returns a status object describing the use and capacity of the file system. If the file system has multiple partitions, the use and capacity of the partition pointed to by the specified path is reflected.
    
    オーバーライド:
    
    getStatus クラス内 FileSystem
    
    パラメータ:
    
    p - Path for which status should be obtained. null means the default partition.
    
    戻り値:
    
    a FsStatus object
    
    例外:
    
    IOException - see specific implementation
  - moveFromLocalFile
```
public void moveFromLocalFile(Path src,
                              Path dst)
                       throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    The src file is on the local disk. Add it to FS at the given dst name, removing the source afterwards.
    
    オーバーライド:
    
    moveFromLocalFile クラス内 FileSystem
    
    パラメータ:
    
    src - path
    
    dst - path
    
    例外:
    
    IOException
  - startLocalOutput
```
public Path startLocalOutput(Path fsOutputFile,
                             Path tmpLocalFile)
                      throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Returns a local File that the user can write output to. The caller provides both the eventual FS target name and the local working file. If the FS is local, we write directly into the target. If the FS is remote, we write into the tmp local area.
    
    オーバーライド:
    
    startLocalOutput クラス内 FileSystem
    
    パラメータ:
    
    fsOutputFile - path of output file
    
    tmpLocalFile - path of local tmp file
    
    例外:
    
    IOException
  - completeLocalOutput
```
public void completeLocalOutput(Path fsWorkingFile,
                                Path tmpLocalFile)
                         throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Called when we're all done writing to the target. A local FS will do nothing, because we've written to exactly the right place. A remote FS will copy the contents of tmpLocalFile to the correct target at fsOutputFile.
    
    オーバーライド:
    
    completeLocalOutput クラス内 FileSystem
    
    パラメータ:
    
    fsWorkingFile - path of output file
    
    tmpLocalFile - path to local tmp file
    
    例外:
    
    IOException
  - close
```
public void close()
           throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    No more filesystem operations are needed. Will release any held locks.
    
    定義:
    
    close インタフェース内 Closeable
    
    定義:
    
    close インタフェース内 AutoCloseable
    
    オーバーライド:
    
    close クラス内 FileSystem
    
    例外:
    
    IOException
  - toString
```
public String toString()
```
    オーバーライド:
    
    toString クラス内 Object
  - getFileStatus
```
public FileStatus getFileStatus(Path f)
                         throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Return a file status object that represents the path.
    
    定義:
    
    getFileStatus クラス内 FileSystem
    
    パラメータ:
    
    f - The path we want information from
    
    戻り値:
    
    a FileStatus object
    
    例外:
    
    FileNotFoundException - when the path does not exist; IOException see specific implementation
    
    IOException
  - setOwner
```
public void setOwner(Path p,
                     String username,
                     String groupname)
              throws IOException
```
    Use the command chown to set owner.
    
    オーバーライド:
    
    setOwner クラス内 FileSystem
    
    パラメータ:
    
    p - The path
    
    username - If it is null, the original username remains unchanged.
    
    groupname - If it is null, the original groupname remains unchanged.
    
    例外:
    
    IOException
  - setPermission
```
public void setPermission(Path p,
                          FsPermission permission)
                   throws IOException
```
    Use the command chmod to set permission.
    
    オーバーライド:
    
    setPermission クラス内 FileSystem
    
    パラメータ:
    
    p - The path
    
    permission - permission
    
    例外:
    
    IOException
  - setTimes
```
public void setTimes(Path p,
                     long mtime,
                     long atime)
              throws IOException
```
    Sets the Path's last modified time and last access time to the given valid times.
    
    オーバーライド:
    
    setTimes クラス内 FileSystem
    
    パラメータ:
    
    mtime - the modification time to set (only if no less than zero).
    
    atime - the access time to set (only if no less than zero).
    
    p - The path
    
    例外:
    
    IOException - if setting the times fails.
  - supportsSymlinks
```
public boolean supportsSymlinks()
```
    クラスからコピーされた説明: FileSystem
    
    See AbstractFileSystem.supportsSymlinks()
    
    オーバーライド:
    
    supportsSymlinks クラス内 FileSystem
  - createSymlink
```
public void createSymlink(Path target,
                          Path link,
                          boolean createParent)
                   throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    See FileContext.createSymlink(Path, Path, boolean)
    
    オーバーライド:
    
    createSymlink クラス内 FileSystem
    
    例外:
    
    IOException
  - getFileLinkStatus
```
public FileStatus getFileLinkStatus(Path f)
                             throws IOException
```
    Return a FileStatus representing the given path. If the path refers to a symlink return a FileStatus representing the link rather than the object the link refers to.
    
    オーバーライド:
    
    getFileLinkStatus クラス内 FileSystem
    
    例外:
    
    IOException
  - getLinkTarget
```
public Path getLinkTarget(Path f)
                   throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    See FileContext.getLinkTarget(Path)
    
    オーバーライド:
    
    getLinkTarget クラス内 FileSystem
    
    例外:
    
    IOException

クラス RawLocalFileSystem

フィールドのサマリー

クラスから継承されたフィールド org.apache.hadoop.fs.FileSystem

コンストラクタのサマリー

メソッドのサマリー

クラスから継承されたメソッド org.apache.hadoop.fs.FileSystem

クラスから継承されたメソッド org.apache.hadoop.conf.Configured

クラスから継承されたメソッド java.lang.Object

コンストラクタの詳細

RawLocalFileSystem

メソッドの詳細

useStatIfAvailable

pathToFile

getUri

initialize

open

append

create

createOutputStream

createOutputStreamWithMode

createNonRecursive

create

createNonRecursive

rename

handleEmptyDstDirectoryOnWindows

truncate

delete

listStatus

mkOneDir

mkOneDirWithMode

mkdirs

mkdirs

getHomeDirectory

setWorkingDirectory

getWorkingDirectory

getInitialWorkingDirectory

getStatus

moveFromLocalFile

startLocalOutput

completeLocalOutput

close

toString

getFileStatus

setOwner

setPermission

setTimes

supportsSymlinks

createSymlink

getFileLinkStatus

getLinkTarget