com.terracottatech.offheapstore.filesystem.impl

Class OffheapFileSystem

java.lang.Object

com.terracottatech.offheapstore.filesystem.impl.OffheapFileSystem

All Implemented Interfaces:

FileSystem

public class OffheapFileSystem
extends Object
implements FileSystem

Constructor Summary

Constructors

Constructor and Description
OffheapFileSystem(PageSource source)
OffheapFileSystem(PageSource source, int blockSize, int maxDataPageSize, int concurrency)

Method Summary

Modifier and Type	Method and Description
void	delete() Deletes the off heap file system with its directories and files and frees up the memory.
void	deleteDirectory(String name) Deletes a particular directory.
boolean	directoryExists(String name) Checks if a directory exists in the file system
Directory	getOrCreateDirectory(String name) Creates a new, empty directory or returns a reference to the named directory if it already exists.
Set<String>	listDirectories() Returns a listing of all directory names present in the system.

Methods inherited from class java.lang.Object

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

Constructor Detail

OffheapFileSystem

public OffheapFileSystem(PageSource source)

OffheapFileSystem

public OffheapFileSystem(PageSource source,
                         int blockSize,
                         int maxDataPageSize,
                         int concurrency)

Method Detail

getOrCreateDirectory

public Directory getOrCreateDirectory(String name)
                               throws IOException

Description copied from interface: FileSystem

Creates a new, empty directory or returns a reference to the named directory if it already exists. Nested directories are not allowed, hence a directory name of "foo/bar" will result in the creation of a directory named "foo/bar".

Specified by:

getOrCreateDirectory in interface FileSystem

Parameters:

name - name of the directory to be created.

Returns:

a reference to the new or existing directory

Throws:

IOException - if an I/O error occurs.

listDirectories

public Set<String> listDirectories()
                            throws IOException

Description copied from interface: FileSystem

Returns a listing of all directory names present in the system.

Specified by:

listDirectories in interface FileSystem

Returns:

a list containing names of the directories.

Throws:

IOException - if an I/O error occurs.

deleteDirectory

public void deleteDirectory(String name)
                     throws IOException,
                            FileNotFoundException

Description copied from interface: FileSystem

Deletes a particular directory.

Specified by:

deleteDirectory in interface FileSystem

Parameters:

name - of the directory to be deleted

Throws:

IOException - if an I/O error occurs.

FileNotFoundException - if the directory does not exist.

delete

public void delete()
            throws IOException

Description copied from interface: FileSystem

Deletes the off heap file system with its directories and files and frees up the memory. If a directory creation operation is interleaved with this method, then the new directory may or may not be deleted.

Specified by:

delete in interface FileSystem

Throws:

IOException - if an I/O error occurs.

directoryExists

public boolean directoryExists(String name)
                        throws IOException

Description copied from interface: FileSystem

Checks if a directory exists in the file system

Specified by:

directoryExists in interface FileSystem

Parameters:

name - of the directory to check for existence

Returns:

true if the directory exists, false otherwise.

Throws:

IOException - if an I/O error occurs.