Package org.h2.test.utils

Class FilePathReorderWrites

java.lang.Object

org.h2.store.fs.FilePath

org.h2.store.fs.FilePathWrapper

org.h2.test.utils.FilePathReorderWrites

public class FilePathReorderWrites
extends FilePathWrapper

An unstable file system. It is used to simulate file system problems (for example out of disk space).

Field Summary

Fields inherited from class org.h2.store.fs.FilePath

name

Constructor Summary

Constructors

Constructor	Description
FilePathReorderWrites()

Method Summary

Modifier and Type	Method	Description
void	delete()	Delete a file or directory if it exists.
long	getMaxAge()
int	getPowerOffCountdown()
java.lang.String	getScheme()	Get the scheme (prefix) for this file provider.
java.nio.channels.FileChannel	open(java.lang.String mode)	Open a random access file object.
static FilePathReorderWrites	register()	Register the file system.
static void	setPartialWrites(boolean b)	Whether partial writes are possible (writing only part of the data).
void	setPowerOffCountdown(int count, int seed)	Set the number of write operations before a simulated power failure, and the random seed (for partial writes).

Methods inherited from class org.h2.store.fs.FilePathWrapper

canWrite, createDirectory, createFile, createTempFile, exists, getBase, getParent, getPath, getPrefix, isAbsolute, isDirectory, isRegularFile, lastModified, moveTo, newDirectoryStream, newInputStream, newOutputStream, setReadOnly, size, toRealPath, unwrap, unwrap, wrap

Methods inherited from class org.h2.store.fs.FilePath

get, getName, newFileChannelOutputStream, register, toString, unregister

Methods inherited from class java.lang.Object

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

Constructor Detail

FilePathReorderWrites

public FilePathReorderWrites()

Method Detail

register

public static FilePathReorderWrites register()

Register the file system.

Returns:

the instance

setPowerOffCountdown

public void setPowerOffCountdown(int count,
                                 int seed)

Set the number of write operations before a simulated power failure, and the random seed (for partial writes).

Parameters:

count - the number of write operations (0 to never fail, Integer.MAX_VALUE to count the operations)

seed - the new seed

getPowerOffCountdown

public int getPowerOffCountdown()

setPartialWrites

public static void setPartialWrites(boolean b)

Whether partial writes are possible (writing only part of the data).

Parameters:

b - true to enable

open

public java.nio.channels.FileChannel open(java.lang.String mode)
                                   throws java.io.IOException

Description copied from class: FilePath

Open a random access file object.

Overrides:

open in class FilePathWrapper

Parameters:

mode - the access mode. Supported are r, rw, rws, rwd

Returns:

the file object

Throws:

java.io.IOException - If an I/O error occurs

getScheme

public java.lang.String getScheme()

Description copied from class: FilePath

Get the scheme (prefix) for this file provider. This is similar to java.nio.file.spi.FileSystemProvider.getScheme.

Specified by:

getScheme in class FilePath

Returns:

the scheme

getMaxAge

public long getMaxAge()

delete

public void delete()

Description copied from class: FilePath

Delete a file or directory if it exists. Directories may only be deleted if they are empty.

Overrides:

delete in class FilePathWrapper