org.h2.mvstore

类 OffHeapStore

java.lang.Object

org.h2.mvstore.FileStore

org.h2.mvstore.OffHeapStore

public class OffHeapStore
extends FileStore

A storage mechanism that "persists" data in the off-heap area of the main memory.

字段概要

从类继承的字段 org.h2.mvstore.FileStore

encryptedFile, file, fileLock, fileName, fileSize, freeSpace, readBytes, readCount, readOnly, writeBytes, writeCount

构造器概要

构造器

构造器和说明
OffHeapStore()

方法概要

限定符和类型	方法和说明
void	close() Close this store.
void	free(long pos, int length) Mark the space as free.
int	getDefaultRetentionTime() Get the default retention time for this store in milliseconds.
void	open(String fileName, boolean readOnly, char[] encryptionKey) Try to open the file.
ByteBuffer	readFully(long pos, int len) Read from the file.
void	sync() Flush all changes.
String	toString()
void	truncate(long size) Truncate the file.
void	writeFully(long pos, ByteBuffer src) Write to the file.

从类继承的方法 org.h2.mvstore.FileStore

allocate, clear, getEncryptedFile, getFile, getFileName, getFillRate, getReadBytes, getReadCount, getWriteBytes, getWriteCount, isReadOnly, markUsed, size

从类继承的方法 java.lang.Object

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

构造器详细资料

OffHeapStore

public OffHeapStore()

方法详细资料

open

public void open(String fileName,
                 boolean readOnly,
                 char[] encryptionKey)

从类复制的说明: FileStore

Try to open the file.

覆盖:

open 在类中 FileStore

参数:

fileName - the file name

readOnly - whether the file should only be opened in read-only mode, even if the file is writable

encryptionKey - the encryption key, or null if encryption is not used

toString

public String toString()

覆盖:

toString 在类中 FileStore

readFully

public ByteBuffer readFully(long pos,
                            int len)

从类复制的说明: FileStore

Read from the file.

覆盖:

readFully 在类中 FileStore

参数:

pos - the write position

len - the number of bytes to read

返回:

the byte buffer

free

public void free(long pos,
                 int length)

从类复制的说明: FileStore

Mark the space as free.

覆盖:

free 在类中 FileStore

参数:

pos - the position in bytes

length - the number of bytes

writeFully

public void writeFully(long pos,
                       ByteBuffer src)

从类复制的说明: FileStore

Write to the file.

覆盖:

writeFully 在类中 FileStore

参数:

pos - the write position

src - the source buffer

truncate

public void truncate(long size)

从类复制的说明: FileStore

Truncate the file.

覆盖:

truncate 在类中 FileStore

参数:

size - the new file size

close

public void close()

从类复制的说明: FileStore

Close this store.

覆盖:

close 在类中 FileStore

sync

public void sync()

从类复制的说明: FileStore

Flush all changes.

覆盖:

sync 在类中 FileStore

getDefaultRetentionTime

public int getDefaultRetentionTime()

从类复制的说明: FileStore

Get the default retention time for this store in milliseconds.

覆盖:

getDefaultRetentionTime 在类中 FileStore

返回:

the retention time