io.apigee.trireme.kernel.fs

Class BasicFilesystem

java.lang.Object

io.apigee.trireme.kernel.fs.BasicFilesystem

Direct Known Subclasses:

AdvancedFilesystem

public class BasicFilesystem
extends java.lang.Object

This class contains a filesystem abstraction. It supports Java 6 and up, and throws exceptions for operations that are not supported on Java 6.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.concurrent.ConcurrentHashMap<java.lang.Integer,AbstractFileHandle>	descriptors
protected static int	FIRST_FD
protected java.util.concurrent.atomic.AtomicInteger	nextFd

Constructor Summary

Constructors

Constructor and Description
BasicFilesystem()

Method Summary

Modifier and Type	Method and Description
void	chmod(java.io.File f, java.lang.String origPath, int origMode, int umask, boolean nofollow)
void	chown(java.io.File file, java.lang.String origPath, java.lang.String uid, java.lang.String gid, boolean noFollow)
void	cleanup()
void	close(int fd)
protected AbstractFileHandle	ensureHandle(int fd)
protected AbstractFileHandle	ensureRegularFileHandle(int fd)
void	fchmod(int fd, int mode, int umask)
void	fchown(int fd, java.lang.String uid, java.lang.String gid, boolean noFollow)
FileStats	fstat(int fd, boolean noFollow)
void	fsync(int fd, boolean syncMetadata)
void	ftruncate(int fd, long len)
void	futimes(int fd, long atime, long mtime)
long	getPosition(int fd)
void	link(java.io.File destFile, java.lang.String destPath, java.io.File srcFile, java.lang.String srcPath)
void	mkdir(java.io.File file, java.lang.String origPath, int mode, int umask)
int	open(java.io.File path, java.lang.String origPath, int flags, int mode, int umask)
int	read(int fd, java.nio.ByteBuffer buf, long pos)
java.util.List<java.lang.String>	readdir(java.io.File f, java.lang.String origPath)
java.lang.String	readlink(java.io.File file, java.lang.String origPath)
void	rename(java.io.File oldFile, java.lang.String oldPath, java.io.File newFile, java.lang.String newPath)
void	rmdir(java.io.File file, java.lang.String origPath)
FileStats	stat(java.io.File f, java.lang.String origPath, boolean noFollow)
void	symlink(java.io.File destFile, java.lang.String destPath, java.io.File srcFile, java.lang.String srcPath)
void	unlink(java.io.File file, java.lang.String origPath)
long	updatePosition(int fd, int delta) Update the saved position for a file descriptor.
void	utimes(java.io.File f, java.lang.String origPath, long atime, long mtime)
int	write(int fd, java.nio.ByteBuffer buf, long pos)

Methods inherited from class java.lang.Object

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

Field Detail

FIRST_FD

protected static final int FIRST_FD

See Also:

Constant Field Values

nextFd

protected final java.util.concurrent.atomic.AtomicInteger nextFd

descriptors

protected final java.util.concurrent.ConcurrentHashMap<java.lang.Integer,AbstractFileHandle> descriptors

Constructor Detail

BasicFilesystem

public BasicFilesystem()

Method Detail

open

public int open(java.io.File path,
                java.lang.String origPath,
                int flags,
                int mode,
                int umask)
         throws OSException

Throws:

OSException

close

public void close(int fd)
           throws OSException

Throws:

OSException

updatePosition

public long updatePosition(int fd,
                           int delta)
                    throws OSException

Update the saved position for a file descriptor. This is used for "positional writes" and "positional reads." The call updates the position by "delta," and it returns the original position BEFORE the update was made.

Throws:

OSException

getPosition

public long getPosition(int fd)
                 throws OSException

Throws:

OSException

write

public int write(int fd,
                 java.nio.ByteBuffer buf,
                 long pos)
          throws OSException

Throws:

OSException

read

public int read(int fd,
                java.nio.ByteBuffer buf,
                long pos)
         throws OSException

Throws:

OSException

stat

public FileStats stat(java.io.File f,
                      java.lang.String origPath,
                      boolean noFollow)
               throws OSException

Throws:

OSException

fstat

public FileStats fstat(int fd,
                       boolean noFollow)
                throws OSException

Throws:

OSException

utimes

public void utimes(java.io.File f,
                   java.lang.String origPath,
                   long atime,
                   long mtime)
            throws OSException

Throws:

OSException

futimes

public void futimes(int fd,
                    long atime,
                    long mtime)
             throws OSException

Throws:

OSException

chmod

public void chmod(java.io.File f,
                  java.lang.String origPath,
                  int origMode,
                  int umask,
                  boolean nofollow)
           throws OSException

Throws:

OSException

fchmod

public void fchmod(int fd,
                   int mode,
                   int umask)
            throws OSException

Throws:

OSException

mkdir

public void mkdir(java.io.File file,
                  java.lang.String origPath,
                  int mode,
                  int umask)
           throws OSException

Throws:

OSException

unlink

public void unlink(java.io.File file,
                   java.lang.String origPath)
            throws OSException

Throws:

OSException

rmdir

public void rmdir(java.io.File file,
                  java.lang.String origPath)
           throws OSException

Throws:

OSException

rename

public void rename(java.io.File oldFile,
                   java.lang.String oldPath,
                   java.io.File newFile,
                   java.lang.String newPath)
            throws OSException

Throws:

OSException

ftruncate

public void ftruncate(int fd,
                      long len)
               throws OSException

Throws:

OSException

fsync

public void fsync(int fd,
                  boolean syncMetadata)
           throws OSException

Throws:

OSException

readdir

public java.util.List<java.lang.String> readdir(java.io.File f,
                                                java.lang.String origPath)
                                         throws OSException

Throws:

OSException

chown

public void chown(java.io.File file,
                  java.lang.String origPath,
                  java.lang.String uid,
                  java.lang.String gid,
                  boolean noFollow)
           throws OSException

Throws:

OSException

fchown

public void fchown(int fd,
                   java.lang.String uid,
                   java.lang.String gid,
                   boolean noFollow)
            throws OSException

Throws:

OSException

link

public void link(java.io.File destFile,
                 java.lang.String destPath,
                 java.io.File srcFile,
                 java.lang.String srcPath)
          throws OSException

Throws:

OSException

symlink

public void symlink(java.io.File destFile,
                    java.lang.String destPath,
                    java.io.File srcFile,
                    java.lang.String srcPath)
             throws OSException

Throws:

OSException

readlink

public java.lang.String readlink(java.io.File file,
                                 java.lang.String origPath)
                          throws OSException

Throws:

OSException

ensureHandle

protected AbstractFileHandle ensureHandle(int fd)
                                   throws OSException

Throws:

OSException

ensureRegularFileHandle

protected AbstractFileHandle ensureRegularFileHandle(int fd)
                                              throws OSException

Throws:

OSException

cleanup

public void cleanup()