org.jruby.util

Class AppendModeChannel

java.lang.Object

java.nio.channels.spi.AbstractInterruptibleChannel

java.nio.channels.FileChannel

org.jruby.util.AppendModeChannel

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, java.nio.channels.ByteChannel, java.nio.channels.Channel, java.nio.channels.GatheringByteChannel, java.nio.channels.InterruptibleChannel, java.nio.channels.ReadableByteChannel, java.nio.channels.ScatteringByteChannel, java.nio.channels.SeekableByteChannel, java.nio.channels.WritableByteChannel

public class AppendModeChannel
extends java.nio.channels.FileChannel

A Channel wrapper that will seek to the end of the open file on any write() operations by performing a seek to eof beforehand. Motivated by a+ mode which requires RandomAccessFile in pure-Java mode but has no append option ala O_APPEND to open(2).

Nested Class Summary

Nested classes/interfaces inherited from class java.nio.channels.FileChannel

java.nio.channels.FileChannel.MapMode

Constructor Summary

Constructors

Constructor and Description
AppendModeChannel(java.nio.channels.FileChannel delegate)

Method Summary

Modifier and Type	Method and Description
void	force(boolean metaData)
protected void	implCloseChannel()
java.nio.channels.FileLock	lock(long position, long size, boolean shared)
java.nio.MappedByteBuffer	map(java.nio.channels.FileChannel.MapMode mode, long position, long size)
long	position()
java.nio.channels.FileChannel	position(long newPosition)
int	read(java.nio.ByteBuffer dst)
long	read(java.nio.ByteBuffer[] dsts, int offset, int length)
int	read(java.nio.ByteBuffer dst, long position)
long	size()
long	transferFrom(java.nio.channels.ReadableByteChannel src, long position, long count)
long	transferTo(long position, long count, java.nio.channels.WritableByteChannel target)
java.nio.channels.FileChannel	truncate(long size)
java.nio.channels.FileLock	tryLock(long position, long size, boolean shared)
int	write(java.nio.ByteBuffer src)
long	write(java.nio.ByteBuffer[] srcs, int offset, int length)
int	write(java.nio.ByteBuffer src, long position)

Methods inherited from class java.nio.channels.FileChannel

lock, open, open, read, tryLock, write

Methods inherited from class java.nio.channels.spi.AbstractInterruptibleChannel

begin, close, end, isOpen

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.nio.channels.Channel

close, isOpen

Constructor Detail

AppendModeChannel

public AppendModeChannel(java.nio.channels.FileChannel delegate)

Method Detail

read

public int read(java.nio.ByteBuffer dst)
         throws java.io.IOException

Specified by:

read in interface java.nio.channels.ReadableByteChannel

Specified by:

read in interface java.nio.channels.SeekableByteChannel

Specified by:

read in class java.nio.channels.FileChannel

Throws:

java.io.IOException

read

public long read(java.nio.ByteBuffer[] dsts,
                 int offset,
                 int length)
          throws java.io.IOException

Specified by:

read in interface java.nio.channels.ScatteringByteChannel

Specified by:

read in class java.nio.channels.FileChannel

Throws:

java.io.IOException

write

public int write(java.nio.ByteBuffer src)
          throws java.io.IOException

Specified by:

write in interface java.nio.channels.SeekableByteChannel

Specified by:

write in interface java.nio.channels.WritableByteChannel

Specified by:

write in class java.nio.channels.FileChannel

Throws:

java.io.IOException

write

public long write(java.nio.ByteBuffer[] srcs,
                  int offset,
                  int length)
           throws java.io.IOException

Specified by:

write in interface java.nio.channels.GatheringByteChannel

Specified by:

write in class java.nio.channels.FileChannel

Throws:

java.io.IOException

position

public long position()
              throws java.io.IOException

Specified by:

position in interface java.nio.channels.SeekableByteChannel

Specified by:

position in class java.nio.channels.FileChannel

Throws:

java.io.IOException

position

public java.nio.channels.FileChannel position(long newPosition)
                                       throws java.io.IOException

Specified by:

position in interface java.nio.channels.SeekableByteChannel

Overrides:

position in class java.nio.channels.FileChannel

Throws:

java.io.IOException

size

public long size()
          throws java.io.IOException

Specified by:

size in interface java.nio.channels.SeekableByteChannel

Specified by:

size in class java.nio.channels.FileChannel

Throws:

java.io.IOException

truncate

public java.nio.channels.FileChannel truncate(long size)
                                       throws java.io.IOException

Specified by:

truncate in interface java.nio.channels.SeekableByteChannel

Overrides:

truncate in class java.nio.channels.FileChannel

Throws:

java.io.IOException

force

public void force(boolean metaData)
           throws java.io.IOException

Specified by:

force in class java.nio.channels.FileChannel

Throws:

java.io.IOException

transferTo

public long transferTo(long position,
                       long count,
                       java.nio.channels.WritableByteChannel target)
                throws java.io.IOException

Specified by:

transferTo in class java.nio.channels.FileChannel

Throws:

java.io.IOException

transferFrom

public long transferFrom(java.nio.channels.ReadableByteChannel src,
                         long position,
                         long count)
                  throws java.io.IOException

Specified by:

transferFrom in class java.nio.channels.FileChannel

Throws:

java.io.IOException

read

public int read(java.nio.ByteBuffer dst,
                long position)
         throws java.io.IOException

Specified by:

read in class java.nio.channels.FileChannel

Throws:

java.io.IOException

write

public int write(java.nio.ByteBuffer src,
                 long position)
          throws java.io.IOException

Specified by:

write in class java.nio.channels.FileChannel

Throws:

java.io.IOException

map

public java.nio.MappedByteBuffer map(java.nio.channels.FileChannel.MapMode mode,
                                     long position,
                                     long size)
                              throws java.io.IOException

Specified by:

map in class java.nio.channels.FileChannel

Throws:

java.io.IOException

lock

public java.nio.channels.FileLock lock(long position,
                                       long size,
                                       boolean shared)
                                throws java.io.IOException

Specified by:

lock in class java.nio.channels.FileChannel

Throws:

java.io.IOException

tryLock

public java.nio.channels.FileLock tryLock(long position,
                                          long size,
                                          boolean shared)
                                   throws java.io.IOException

Specified by:

tryLock in class java.nio.channels.FileChannel

Throws:

java.io.IOException

implCloseChannel

protected void implCloseChannel()
                         throws java.io.IOException

Specified by:

implCloseChannel in class java.nio.channels.spi.AbstractInterruptibleChannel

Throws:

java.io.IOException