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 and Description
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. If releaseBuffer is true the provided bytes should be released through SequentialFileFactory.releaseBuffer(ByteBuffer), if supported.
int	calculateBlockStart(int position)
SequentialFile	cloneFile()
void	close()
default void	close(boolean waitSync) When closing a file from a finalize block, you cant wait on syncs or anything like that.
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()
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)
int	read(ByteBuffer bytes, IOCallback callback)
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 Detail

isOpen

boolean isOpen()

exists

boolean exists()

open

void open()
   throws Exception

Throws:

Exception

open

void open(int maxIO,
          boolean useExecutor)
   throws Exception

The maximum number of simultaneous writes accepted

Parameters:

maxIO -

Throws:

Exception

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

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

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)
            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.

appendTo

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

Throws:

IOException