com.caucho.vfs
Class PipeStream

java.lang.Object
  com.caucho.vfs.StreamImpl
      com.caucho.vfs.PipeStream

public class PipeStream
extends StreamImpl

Stream allowing two threads to read and write to each other.

Field Summary

Fields inherited from class com.caucho.vfs.StreamImpl

_nullPath, _path

Method Summary

boolean	canRead() PipeStreams can read
boolean	canWrite() The pipe stream can write.
void	close() Closes the stream.
static java.lang.Object[]	create() Creates a pipe pair.
int	getAvailable() Return the available bytes.
int	read(byte[] buf, int offset, int length) Reads the available bytes if any, otherwise block.
void	write(byte[] buf, int offset, int length, boolean isEnd) Implementation of the pipe write.

Methods inherited from class com.caucho.vfs.StreamImpl

clearWrite, closeWrite, flush, flushBuffer, flushToDisk, getAttribute, getAttributeNames, getFlushOnNewline, getNewline, getPath, getReadBuffer, getReadPosition, hasSkip, isClosed, isEof, readNonBlock, readTimeout, removeAttribute, seekEnd, seekStart, setAttribute, setPath, setWriteEncoding, skip, write

Methods inherited from class java.lang.Object

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

Method Detail

create

public static java.lang.Object[] create()

Creates a pipe pair. The first object is a ReadStream, the second is a WriteStream.

canRead

public boolean canRead()

PipeStreams can read

Overrides:

canRead in class StreamImpl

read

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

Reads the available bytes if any, otherwise block.

Overrides:

read in class StreamImpl

Parameters:

buf - byte array receiving the data.

offset - starting offset into the array.

length - number of bytes to read.

Returns:

the number of bytes read or -1 on end of file.

Throws:

java.io.IOException

getAvailable

public int getAvailable()
                 throws java.io.IOException

Return the available bytes.

Overrides:

getAvailable in class StreamImpl

Throws:

java.io.IOException

canWrite

public boolean canWrite()

The pipe stream can write.

Overrides:

canWrite in class StreamImpl

write

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

Implementation of the pipe write.

Overrides:

write in class StreamImpl

Parameters:

buf - byte buffer containing the bytes

offset - offset where to start writing

length - number of bytes to write

isEnd - true when the write is flushing a close.

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Description copied from class: StreamImpl

Closes the stream.

Overrides:

close in class StreamImpl

Throws:

java.io.IOException