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

Interface SequentialFile

All Known Implementing Classes:

AbstractSequentialFile, AIOSequentialFile, JDBCSequentialFile, NIOSequentialFile

public interface SequentialFile

Method Summary

Modifier and Type	Method	Description
default void	afterComplete(Runnable run)
static long	appendTo(Path src, Path dst)
void	blockingWriteDirect(ByteBuffer bytes, boolean sync, boolean releaseBuffer)	Write directly to the file without using any intermediate buffer and wait completion.
int	calculateBlockStart(int position)
SequentialFile	cloneFile()
void	close()
default void	close(boolean waitSync, boolean blockOnWait)	When closing a file from a finalize block, you cant wait on syncs or anything like that. otherwise the VM may hung.
void	copyTo(SequentialFile newFileName)
void	delete()
boolean	exists()
void	fill(int size)
boolean	fits(int size)
String	getFileName()
File	getJavaFile()	Returns a native File of the file underlying this sequential file.
boolean	isOpen()
ByteBuffer	map(int position, long size)
void	open()
void	open(int maxIO, boolean useExecutor)	The maximum number of simultaneous writes accepted
long	position()
void	position(long pos)
int	read(ByteBuffer bytes)	Read the file.
int	read(ByteBuffer bytes, IOCallback callback)	Read the file.
void	renameTo(String newFileName)
void	setTimedBuffer(TimedBuffer buffer)
long	size()
void	sync()
void	write(ActiveMQBuffer bytes, boolean sync)
void	write(ActiveMQBuffer bytes, boolean sync, IOCallback callback)
void	write(EncodingSupport bytes, boolean sync)
void	write(EncodingSupport bytes, boolean sync, IOCallback callback)
void	writeDirect(ByteBuffer bytes, boolean sync)	Write directly to the file without using intermediate any buffer
void	writeDirect(ByteBuffer bytes, boolean sync, IOCallback callback)	Write directly to the file without using any buffer

Method Details

isOpen

boolean isOpen()

exists

boolean exists()

open

void open()
   throws Exception

Throws:

Exception

afterComplete

default void afterComplete(Runnable run)

open

void open(int maxIO,
 boolean useExecutor)
   throws Exception

The maximum number of simultaneous writes accepted

Throws:

Exception

map

ByteBuffer map(int position,
 long size)
        throws IOException

Throws:

IOException

fits

boolean fits(int size)

calculateBlockStart

int calculateBlockStart(int position)
                 throws Exception

Throws:

Exception

getFileName

String getFileName()

fill

void fill(int size)
   throws Exception

Throws:

Exception

delete

void delete()
     throws IOException,
InterruptedException,
ActiveMQException

Throws:

IOException

InterruptedException

ActiveMQException

write

void write(ActiveMQBuffer bytes,
 boolean sync,
 IOCallback callback)
    throws Exception

Throws:

Exception

write

void write(ActiveMQBuffer bytes,
 boolean sync)
    throws Exception

Throws:

Exception

write

void write(EncodingSupport bytes,
 boolean sync,
 IOCallback callback)
    throws Exception

Throws:

Exception

write

void write(EncodingSupport bytes,
 boolean sync)
    throws Exception

Throws:

Exception

writeDirect

void writeDirect(ByteBuffer bytes,
 boolean sync,
 IOCallback callback)

Write directly to the file without using any buffer

Parameters:

bytes - the ByteBuffer must be compatible with the SequentialFile implementation (AIO or NIO). To be safe, use a buffer from the corresponding SequentialFileFactory.newBuffer(int).

writeDirect

void writeDirect(ByteBuffer bytes,
 boolean sync)
          throws Exception

Write directly to the file without using intermediate any buffer

Parameters:

bytes - the ByteBuffer must be compatible with the SequentialFile implementation (AIO or NIO). To be safe, use a buffer from the corresponding SequentialFileFactory.newBuffer(int).

Throws:

Exception

blockingWriteDirect

void blockingWriteDirect(ByteBuffer bytes,
 boolean sync,
 boolean releaseBuffer)
                  throws Exception

Write directly to the file without using any intermediate buffer and wait completion.

If releaseBuffer is true the provided bytes should be released through SequentialFileFactory.releaseBuffer(ByteBuffer), if supported.

Parameters:

bytes - the ByteBuffer must be compatible with the SequentialFile implementation (AIO or NIO). If releaseBuffer is true use a buffer from SequentialFileFactory.newBuffer(int), SequentialFileFactory.allocateDirectBuffer(int) otherwise.

sync - if true will durable flush the written data on the file, false otherwise

releaseBuffer - if true will release the buffer, false otherwise

Throws:

Exception

read

int read(ByteBuffer bytes,
 IOCallback callback)
  throws Exception

Read the file.

Parameters:

bytes - the ByteBuffer must be compatible with the SequentialFile implementation (AIO or NIO). To be safe, use a buffer from the corresponding SequentialFileFactory.newBuffer(int).

Throws:

Exception

read

int read(ByteBuffer bytes)
  throws Exception

Read the file.

Parameters:

bytes - the ByteBuffer must be compatible with the SequentialFile implementation (AIO or NIO). To be safe, use a buffer from the corresponding SequentialFileFactory.newBuffer(int).

Throws:

Exception

position

void position(long pos)
       throws IOException

Throws:

IOException

position

long position()

close

void close()
    throws Exception

Throws:

Exception

close

default void close(boolean waitSync,
 boolean blockOnWait)
            throws Exception

When closing a file from a finalize block, you cant wait on syncs or anything like that. otherwise the VM may hung. Especially on the testsuite.

Throws:

Exception

sync

void sync()
   throws IOException

Throws:

IOException

size

long size()
   throws Exception

Throws:

Exception

renameTo

void renameTo(String newFileName)
       throws Exception

Throws:

Exception

cloneFile

SequentialFile cloneFile()

copyTo

void copyTo(SequentialFile newFileName)
     throws Exception

Throws:

Exception

setTimedBuffer

void setTimedBuffer(TimedBuffer buffer)

getJavaFile

File getJavaFile()

Returns a native File of the file underlying this sequential file.

Returns:

a native File of the file underlying this sequential file

appendTo

static long appendTo(Path src,
 Path dst)
              throws IOException

Throws:

IOException