Package org.apache.activemq.artemis.core.io.mapped

Class MappedSequentialFileFactory

java.lang.Object

org.apache.activemq.artemis.core.io.AbstractSequentialFileFactory

org.apache.activemq.artemis.core.io.mapped.MappedSequentialFileFactory

All Implemented Interfaces:

SequentialFileFactory

public final class MappedSequentialFileFactory
extends AbstractSequentialFileFactory

Field Summary

Fields inherited from class org.apache.activemq.artemis.core.io.AbstractSequentialFileFactory

alignment, bufferSize, bufferTimeout, critialErrorListener, criticalAnalyzer, dataSync, EXECUTOR_TIMEOUT, journalDir, maxIO, timedBuffer, writeExecutor

Constructor Summary

Constructors

Constructor	Description
MappedSequentialFileFactory(File directory, int capacity, boolean buffered, int bufferSize, int bufferTimeout, IOCriticalErrorListener criticalErrorListener)

Method Summary

Modifier and Type	Method	Description
ByteBuffer	allocateDirectBuffer(int size)	used for cases where you need direct buffer outside of the journal context.
int	calculateBlockSize(int bytes)
int	capacity()
MappedSequentialFileFactory	capacity(int capacity)
void	clearBuffer(ByteBuffer buffer)
SequentialFile	createSequentialFile(String fileName)
SequentialFile	createSequentialFile(String fileName, int capacity)
MappedSequentialFileFactory	disableBufferReuse()
MappedSequentialFileFactory	enableBufferReuse()
int	getAlignment()
boolean	isSupportsCallbacks()
ByteBuffer	newBuffer(int size)	Note: You need to release the buffer if is used for reading operations.
ByteBuffer	newBuffer(int size, boolean zeroed)	Note: You need to release the buffer if is used for reading operations.
void	releaseBuffer(ByteBuffer buffer)
void	releaseDirectBuffer(ByteBuffer buffer)	used for cases where you need direct buffer outside of the journal context.
MappedSequentialFileFactory	setAlignment(int alignment)	Deprecated.
MappedSequentialFileFactory	setDatasync(boolean enabled)
void	start()
void	stop()
ByteBuffer	wrapBuffer(byte[] bytes)

Methods inherited from class org.apache.activemq.artemis.core.io.AbstractSequentialFileFactory

activateBuffer, createDirs, deactivateBuffer, flush, getBufferSize, getCriticalAnalyzer, getCriticalErrorListener, getDirectory, getMaxIO, isDatasync, listFiles, onIOError, setCriticalErrorListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.activemq.artemis.core.io.SequentialFileFactory

onIOError, onIOError

Constructor Detail

MappedSequentialFileFactory

public MappedSequentialFileFactory(File directory,
                                   int capacity,
                                   boolean buffered,
                                   int bufferSize,
                                   int bufferTimeout,
                                   IOCriticalErrorListener criticalErrorListener)

Method Detail

capacity

public MappedSequentialFileFactory capacity(int capacity)

capacity

public int capacity()

createSequentialFile

public SequentialFile createSequentialFile(String fileName)

createSequentialFile

public SequentialFile createSequentialFile(String fileName,
                                           int capacity)

isSupportsCallbacks

public boolean isSupportsCallbacks()

allocateDirectBuffer

public ByteBuffer allocateDirectBuffer(int size)

Description copied from interface: SequentialFileFactory

used for cases where you need direct buffer outside of the journal context. This is because the native layer has a method that can be reused in certain cases like paging

releaseDirectBuffer

public void releaseDirectBuffer(ByteBuffer buffer)

Description copied from interface: SequentialFileFactory

used for cases where you need direct buffer outside of the journal context. This is because the native layer has a method that can be reused in certain cases like paging

enableBufferReuse

public MappedSequentialFileFactory enableBufferReuse()

disableBufferReuse

public MappedSequentialFileFactory disableBufferReuse()

newBuffer

public ByteBuffer newBuffer(int size)

Description copied from interface: SequentialFileFactory

Note: You need to release the buffer if is used for reading operations. You don't need to do it if using writing operations (AIO Buffer Lister will take of writing operations)

Returns:

the allocated ByteBuffer

newBuffer

public ByteBuffer newBuffer(int size,
                            boolean zeroed)

Description copied from interface: SequentialFileFactory

Note: You need to release the buffer if is used for reading operations. You don't need to do it if using writing operations (AIO Buffer Lister will take of writing operations)

zeroed - if true the returned ByteBuffer must be zeroed, otherwise it tries to save zeroing it.

Returns:

the allocated ByteBuffer

releaseBuffer

public void releaseBuffer(ByteBuffer buffer)

Specified by:

releaseBuffer in interface SequentialFileFactory

Overrides:

releaseBuffer in class AbstractSequentialFileFactory

setDatasync

public MappedSequentialFileFactory setDatasync(boolean enabled)

Specified by:

setDatasync in interface SequentialFileFactory

Overrides:

setDatasync in class AbstractSequentialFileFactory

wrapBuffer

public ByteBuffer wrapBuffer(byte[] bytes)

getAlignment

public int getAlignment()

Specified by:

getAlignment in interface SequentialFileFactory

Overrides:

getAlignment in class AbstractSequentialFileFactory

setAlignment

@Deprecated
public MappedSequentialFileFactory setAlignment(int alignment)

Deprecated.

Specified by:

setAlignment in interface SequentialFileFactory

Overrides:

setAlignment in class AbstractSequentialFileFactory

calculateBlockSize

public int calculateBlockSize(int bytes)

clearBuffer

public void clearBuffer(ByteBuffer buffer)

start

public void start()

Specified by:

start in interface SequentialFileFactory

Overrides:

start in class AbstractSequentialFileFactory

stop

public void stop()

Specified by:

stop in interface SequentialFileFactory

Overrides:

stop in class AbstractSequentialFileFactory