io.openmessaging.storage.dledger.store.file

类 MmapFileList

java.lang.Object

io.openmessaging.storage.dledger.store.file.MmapFileList

public class MmapFileList
extends java.lang.Object

字段概要

字段

限定符和类型	字段和说明
static int	BLANK_MAGIC_CODE
static int	MIN_BLANK_LEN

构造器概要

构造器

构造器和说明
MmapFileList(java.lang.String storePath, int mappedFileSize)

方法概要

限定符和类型	方法和说明
long	append(byte[] data)
long	append(byte[] data, boolean useBlank)
long	append(byte[] data, int pos, int len)
long	append(byte[] data, int pos, int len, boolean useBlank)
boolean	checkSelf()
boolean	commit(int commitLeastPages)
int	deleteExpiredFileByOffset(long offset, int unitSize)
int	deleteExpiredFileByTime(long expiredTime, int deleteFilesInterval, long intervalForcibly, boolean cleanImmediately)
void	deleteLastMappedFile()
void	destroy()
MmapFile	findMappedFileByOffset(long offset)
MmapFile	findMappedFileByOffset(long offset, boolean returnFirstOnNotFound) Finds a mapped file by offset.
boolean	flush(int flushLeastPages)
long	getCommittedWhere()
SelectMmapBufferResult	getData(long offset)
SelectMmapBufferResult	getData(long offset, int size)
MmapFile	getFirstMappedFile()
long	getFlushedWhere()
MmapFile	getLastMappedFile()
MmapFile	getLastMappedFile(long startOffset)
MmapFile	getLastMappedFile(long startOffset, boolean needCreate)
MmapFile	getMappedFileByTime(long timestamp)
java.util.List<MmapFile>	getMappedFiles()
int	getMappedFileSize()
long	getMappedMemorySize()
long	getMaxReadPosition()
long	getMaxWrotePosition()
long	getMinOffset()
long	getStoreTimestamp()
boolean	load()
long	preAppend(int len)
long	preAppend(int len, boolean useBlank)
boolean	rebuildWithPos(long pos)
long	remainHowManyDataToCommit()
long	remainHowManyDataToFlush()
void	resetOffset(long offset)
boolean	retryDeleteFirstFile(long intervalForcibly)
void	setCommittedWhere(long committedWhere)
void	setFlushedWhere(long flushedWhere)
void	shutdown(long intervalForcibly)
void	truncateOffset(long offset)
void	updateWherePosition(long wherePosition)

从类继承的方法 java.lang.Object

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

字段详细资料

MIN_BLANK_LEN

public static final int MIN_BLANK_LEN

另请参阅:

常量字段值

BLANK_MAGIC_CODE

public static final int BLANK_MAGIC_CODE

另请参阅:

常量字段值

构造器详细资料

MmapFileList

public MmapFileList(java.lang.String storePath,
                    int mappedFileSize)

方法详细资料

checkSelf

public boolean checkSelf()

getMappedFileByTime

public MmapFile getMappedFileByTime(long timestamp)

truncateOffset

public void truncateOffset(long offset)

resetOffset

public void resetOffset(long offset)

updateWherePosition

public void updateWherePosition(long wherePosition)

append

public long append(byte[] data)

append

public long append(byte[] data,
                   int pos,
                   int len)

append

public long append(byte[] data,
                   boolean useBlank)

preAppend

public long preAppend(int len)

preAppend

public long preAppend(int len,
                      boolean useBlank)

append

public long append(byte[] data,
                   int pos,
                   int len,
                   boolean useBlank)

getData

public SelectMmapBufferResult getData(long offset,
                                      int size)

getData

public SelectMmapBufferResult getData(long offset)

load

public boolean load()

getLastMappedFile

public MmapFile getLastMappedFile(long startOffset,
                                  boolean needCreate)

getLastMappedFile

public MmapFile getLastMappedFile(long startOffset)

getLastMappedFile

public MmapFile getLastMappedFile()

getMinOffset

public long getMinOffset()

getMaxReadPosition

public long getMaxReadPosition()

getMaxWrotePosition

public long getMaxWrotePosition()

remainHowManyDataToCommit

public long remainHowManyDataToCommit()

remainHowManyDataToFlush

public long remainHowManyDataToFlush()

deleteLastMappedFile

public void deleteLastMappedFile()

deleteExpiredFileByTime

public int deleteExpiredFileByTime(long expiredTime,
                                   int deleteFilesInterval,
                                   long intervalForcibly,
                                   boolean cleanImmediately)

deleteExpiredFileByOffset

public int deleteExpiredFileByOffset(long offset,
                                     int unitSize)

flush

public boolean flush(int flushLeastPages)

commit

public boolean commit(int commitLeastPages)

findMappedFileByOffset

public MmapFile findMappedFileByOffset(long offset,
                                       boolean returnFirstOnNotFound)

Finds a mapped file by offset.

参数:

offset - Offset.

returnFirstOnNotFound - If the mapped file is not found, then return the first one.

返回:

Mapped file or null (when not found and returnFirstOnNotFound is false).

getFirstMappedFile

public MmapFile getFirstMappedFile()

findMappedFileByOffset

public MmapFile findMappedFileByOffset(long offset)

getMappedMemorySize

public long getMappedMemorySize()

retryDeleteFirstFile

public boolean retryDeleteFirstFile(long intervalForcibly)

shutdown

public void shutdown(long intervalForcibly)

destroy

public void destroy()

rebuildWithPos

public boolean rebuildWithPos(long pos)

getFlushedWhere

public long getFlushedWhere()

setFlushedWhere

public void setFlushedWhere(long flushedWhere)

getStoreTimestamp

public long getStoreTimestamp()

getMappedFiles

public java.util.List<MmapFile> getMappedFiles()

getMappedFileSize

public int getMappedFileSize()

getCommittedWhere

public long getCommittedWhere()

setCommittedWhere

public void setCommittedWhere(long committedWhere)