org.hornetq.core.journal.impl

Class NIOSequentialFile

java.lang.Object

org.hornetq.core.journal.impl.AbstractSequentialFile

org.hornetq.core.journal.impl.NIOSequentialFile

All Implemented Interfaces:

SequentialFile

public class NIOSequentialFile
extends AbstractSequentialFile

A NIOSequentialFile

Author:

Tim Fox, Clebert Suconic

Nested Class Summary

Nested classes/interfaces inherited from class org.hornetq.core.journal.impl.AbstractSequentialFile

AbstractSequentialFile.DelegateCallback, AbstractSequentialFile.LocalBufferObserver

Field Summary

Fields inherited from class org.hornetq.core.journal.impl.AbstractSequentialFile

factory, fileSize, position, timedBuffer, timedBufferObserver, writerExecutor

Constructor Summary

Constructors

Constructor and Description
NIOSequentialFile(SequentialFileFactory factory, File file, int maxIO, Executor writerExecutor)
NIOSequentialFile(SequentialFileFactory factory, String directory, String fileName, int maxIO, Executor writerExecutor)

Method Summary

Methods

Modifier and Type	Method and Description
int	calculateBlockStart(int position)
SequentialFile	cloneFile()
void	close()
void	fill(int position, int size, byte fillCharacter)
int	getAlignment()
boolean	isOpen()
protected ByteBuffer	newBuffer(int size, int limit)
void	open() this.maxIO represents the default maxIO.
void	open(int maxIO, boolean useExecutor) The maximum number of simultaneous writes accepted
void	position(long pos)
int	read(ByteBuffer bytes)
int	read(ByteBuffer bytes, IOAsyncTask callback)
long	size()
void	sync()
String	toString()
void	waitForClose()
void	writeDirect(ByteBuffer bytes, boolean sync) Write directly to the file without using any buffer
void	writeDirect(ByteBuffer bytes, boolean sync, IOAsyncTask callback) Write directly to the file without using any buffer
void	writeInternal(ByteBuffer bytes) Write directly to the file.

Methods inherited from class org.hornetq.core.journal.impl.AbstractSequentialFile

copyTo, delete, exists, fits, getFile, getFileName, position, renameTo, setTimedBuffer, write, write, write, write

Methods inherited from class java.lang.Object

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

Constructor Detail

NIOSequentialFile

public NIOSequentialFile(SequentialFileFactory factory,
                 String directory,
                 String fileName,
                 int maxIO,
                 Executor writerExecutor)

NIOSequentialFile

public NIOSequentialFile(SequentialFileFactory factory,
                 File file,
                 int maxIO,
                 Executor writerExecutor)

Method Detail

getAlignment

public int getAlignment()

calculateBlockStart

public int calculateBlockStart(int position)
                        throws Exception

Throws:

Exception

isOpen

public boolean isOpen()

open

public void open()
          throws Exception

this.maxIO represents the default maxIO. Some operations while initializing files on the journal may require a different maxIO

Throws:

Exception

open

public void open(int maxIO,
        boolean useExecutor)
          throws Exception

Description copied from interface: SequentialFile

The maximum number of simultaneous writes accepted

Throws:

Exception

fill

public void fill(int position,
        int size,
        byte fillCharacter)
          throws Exception

Throws:

Exception

waitForClose

public void waitForClose()
                  throws Exception

Throws:

Exception

close

public void close()
           throws Exception

Specified by:

close in interface SequentialFile

Overrides:

close in class AbstractSequentialFile

Throws:

Exception

read

public int read(ByteBuffer bytes)
         throws Exception

Throws:

Exception

read

public int read(ByteBuffer bytes,
       IOAsyncTask callback)
         throws Exception

Throws:

Exception

sync

public void sync()
          throws Exception

Throws:

Exception

size

public long size()
          throws Exception

Throws:

Exception

position

public void position(long pos)
              throws Exception

Specified by:

position in interface SequentialFile

Overrides:

position in class AbstractSequentialFile

Throws:

Exception

toString

public String toString()

Overrides:

toString in class Object

cloneFile

public SequentialFile cloneFile()

writeDirect

public void writeDirect(ByteBuffer bytes,
               boolean sync,
               IOAsyncTask callback)

Description copied from interface: SequentialFile

Write directly to the file without using any buffer

writeDirect

public void writeDirect(ByteBuffer bytes,
               boolean sync)
                 throws Exception

Description copied from interface: SequentialFile

Write directly to the file without using any buffer

Throws:

Exception

writeInternal

public void writeInternal(ByteBuffer bytes)
                   throws Exception

Description copied from interface: SequentialFile

Write directly to the file. This is used by compacting and other places where we write a big buffer in a single shot. writeInternal should always block until the entire write is sync on disk

Throws:

Exception

newBuffer

protected ByteBuffer newBuffer(int size,
                   int limit)

Overrides:

newBuffer in class AbstractSequentialFile