com.caucho.vfs

Class DatagramStream

java.lang.Object

com.caucho.vfs.StreamImpl

com.caucho.vfs.DatagramStream

public class DatagramStream
extends StreamImpl

Specialized stream to handle sockets.

Unlike VfsStream, when the read() throws and IOException or a SocketException, SocketStream will throw a ClientDisconnectException.

Field Summary

Fields inherited from class com.caucho.vfs.StreamImpl

_nullPath, _path

Constructor Summary

Constructors

Constructor and Description
DatagramStream(java.net.DatagramSocket s)

Method Summary

Modifier and Type	Method and Description
boolean	canRead() Returns true since the socket stream can be read.
boolean	canWrite() Returns true if this is a writable stream.
void	close() Closes the underlying sockets and socket streams.
void	closeWrite() Closes the write half of the stream.
int	getAvailable() Returns the number of bytes available to be read from the input stream.
java.io.InputStream	getInputStream()
java.io.OutputStream	getOutputStream()
long	getPosition() Returns the position.
boolean	getThrowReadInterrupts() If true, throws read interrupts instead of returning an end of fail.
long	getTotalReadBytes()
long	getTotalWriteBytes()
boolean	hasSkip() Returns true if stream is readable and bytes can be skipped.
int	read(byte[] buf, int offset, int length) Reads bytes from the socket.
int	readTimeout(byte[] buf, int offset, int length, long timeout) Reads bytes from the socket.
void	resetTotalBytes() Flushes the socket.
boolean	setPosition(long offset)
void	setThrowReadInterrupts(boolean allowThrow) If true, throws read interrupts instead of returning an end of fail.
long	skip(long n) Skips bytes in the file.
void	unread() Unread the last byte.
void	write(byte[] buf, int offset, int length, boolean isEnd) Writes bytes to the socket.

Methods inherited from class com.caucho.vfs.StreamImpl

clearWrite, flush, flushBuffer, flushToDisk, getAttribute, getAttributeNames, getFlushOnNewline, getNewline, getPath, getReadBuffer, getReadPosition, isClosed, isEof, isMmapEnabled, isSendfileEnabled, readNonBlock, removeAttribute, seekEnd, seekStart, setAttribute, setPath, setWriteEncoding, write, writeMmap, writeSendfile

Methods inherited from class java.lang.Object

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

Constructor Detail

DatagramStream

public DatagramStream(java.net.DatagramSocket s)

Method Detail

getInputStream

public java.io.InputStream getInputStream()

getOutputStream

public java.io.OutputStream getOutputStream()

setThrowReadInterrupts

public void setThrowReadInterrupts(boolean allowThrow)

If true, throws read interrupts instead of returning an end of fail. Defaults to false.

getThrowReadInterrupts

public boolean getThrowReadInterrupts()

If true, throws read interrupts instead of returning an end of fail. Defaults to false.

getPosition

public long getPosition()

Returns the position.

setPosition

public boolean setPosition(long offset)

unread

public void unread()
            throws java.io.IOException

Unread the last byte.

Throws:

java.io.IOException

hasSkip

public boolean hasSkip()

Returns true if stream is readable and bytes can be skipped.

Overrides:

hasSkip in class StreamImpl

canRead

public boolean canRead()

Returns true since the socket stream can be read.

Overrides:

canRead in class StreamImpl

skip

public long skip(long n)
          throws java.io.IOException

Skips bytes in the file.

Overrides:

skip in class StreamImpl

Parameters:

n - the number of bytes to skip

Returns:

the actual bytes skipped.

Throws:

java.io.IOException

read

public int read(byte[] buf,
                int offset,
                int length)
         throws java.io.IOException

Reads bytes from the socket.

Overrides:

read in class StreamImpl

Parameters:

buf - byte buffer receiving the bytes

offset - offset into the buffer

length - number of bytes to read

Returns:

number of bytes read or -1

Throws:

throws - ClientDisconnectException if the connection is dropped

java.io.IOException

readTimeout

public int readTimeout(byte[] buf,
                       int offset,
                       int length,
                       long timeout)
                throws java.io.IOException

Reads bytes from the socket.

Overrides:

readTimeout in class StreamImpl

Parameters:

buf - byte buffer receiving the bytes

offset - offset into the buffer

length - number of bytes to read

Returns:

number of bytes read or -1

Throws:

throws - ClientDisconnectException if the connection is dropped

java.io.IOException

getAvailable

public int getAvailable()
                 throws java.io.IOException

Returns the number of bytes available to be read from the input stream.

Overrides:

getAvailable in class StreamImpl

Throws:

java.io.IOException

canWrite

public boolean canWrite()

Description copied from class: StreamImpl

Returns true if this is a writable stream.

Overrides:

canWrite in class StreamImpl

write

public void write(byte[] buf,
                  int offset,
                  int length,
                  boolean isEnd)
           throws java.io.IOException

Writes bytes to the socket.

Overrides:

write in class StreamImpl

Parameters:

buf - byte buffer containing the bytes

offset - offset into the buffer

length - number of bytes to read

isEnd - if the write is at a close.

Throws:

throws - ClientDisconnectException if the connection is dropped

java.io.IOException

resetTotalBytes

public void resetTotalBytes()

Flushes the socket.

getTotalReadBytes

public long getTotalReadBytes()

getTotalWriteBytes

public long getTotalWriteBytes()

closeWrite

public void closeWrite()
                throws java.io.IOException

Closes the write half of the stream.

Overrides:

closeWrite in class StreamImpl

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Closes the underlying sockets and socket streams.

Overrides:

close in class StreamImpl

Throws:

java.io.IOException