Class NIOSequentialFileFactory

java.lang.Object

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

org.apache.activemq.artemis.core.io.nio.NIOSequentialFileFactory

All Implemented Interfaces:

SequentialFileFactory

public class NIOSequentialFileFactory
extends AbstractSequentialFileFactory

Field Summary

Fields inherited from class AbstractSequentialFileFactory

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

Constructor Summary

Constructors

Constructor	Description
NIOSequentialFileFactory(File journalDir, boolean buffered, int maxIO)
NIOSequentialFileFactory(File journalDir, boolean buffered, int bufferSize, int bufferTimeout, int maxIO, boolean logRates)
NIOSequentialFileFactory(File journalDir, boolean buffered, int bufferSize, int bufferTimeout, int maxIO, boolean logRates, IOCriticalErrorListener listener, org.apache.activemq.artemis.utils.critical.CriticalAnalyzer analyzer)
NIOSequentialFileFactory(File journalDir, boolean buffered, IOCriticalErrorListener listener, int maxIO)
NIOSequentialFileFactory(File journalDir, int maxIO)
NIOSequentialFileFactory(File journalDir, IOCriticalErrorListener listener, int maxIO)

Method Summary

Modifier and Type	Method	Description
ByteBuffer	allocateDirectBuffer(int size)	used for cases where you need direct buffer outside of the journal context.
static ByteBuffer	allocateDirectByteBuffer(int size)
int	calculateBlockSize(int bytes)
void	clearBuffer(ByteBuffer buffer)
SequentialFile	createSequentialFile(String fileName)
void	disableBufferReuse()
void	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.
ByteBuffer	wrapBuffer(byte[] bytes)

Methods inherited from class AbstractSequentialFileFactory

activateBuffer, createDirs, deactivateBuffer, deleteFolder, flush, getBufferSize, getCriticalAnalyzer, getCriticalErrorListener, getDirectory, getMaxIO, isDatasync, listFiles, onIOError, setAlignment, setCriticalErrorListener, setDatasync, start, stop

Methods inherited from class Object

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

Methods inherited from interface SequentialFileFactory

createSequentialFile, getDirectoryName, isSyncSupported, onIOError, onIOError, supportsIndividualContext

Constructor Details

NIOSequentialFileFactory

public NIOSequentialFileFactory(File journalDir,
 int maxIO)

NIOSequentialFileFactory

public NIOSequentialFileFactory(File journalDir,
 IOCriticalErrorListener listener,
 int maxIO)

NIOSequentialFileFactory

public NIOSequentialFileFactory(File journalDir,
 boolean buffered,
 int maxIO)

NIOSequentialFileFactory

public NIOSequentialFileFactory(File journalDir,
 boolean buffered,
 IOCriticalErrorListener listener,
 int maxIO)

NIOSequentialFileFactory

public NIOSequentialFileFactory(File journalDir,
 boolean buffered,
 int bufferSize,
 int bufferTimeout,
 int maxIO,
 boolean logRates)

NIOSequentialFileFactory

public NIOSequentialFileFactory(File journalDir,
 boolean buffered,
 int bufferSize,
 int bufferTimeout,
 int maxIO,
 boolean logRates,
 IOCriticalErrorListener listener,
 org.apache.activemq.artemis.utils.critical.CriticalAnalyzer analyzer)

Method Details

allocateDirectByteBuffer

public static ByteBuffer allocateDirectByteBuffer(int size)

enableBufferReuse

public void enableBufferReuse()

disableBufferReuse

public void disableBufferReuse()

createSequentialFile

public SequentialFile createSequentialFile(String fileName)

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

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)

Parameters:

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

clearBuffer

public void clearBuffer(ByteBuffer buffer)

wrapBuffer

public ByteBuffer wrapBuffer(byte[] bytes)

getAlignment

public int getAlignment()

Specified by:

getAlignment in interface SequentialFileFactory

Overrides:

getAlignment in class AbstractSequentialFileFactory

calculateBlockSize

public int calculateBlockSize(int bytes)