org.opennms.features.topology.ssh.internal

Class NoClosePipedOutputStream

java.lang.Object

java.io.OutputStream

org.opennms.features.topology.ssh.internal.NoClosePipedOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

public class NoClosePipedOutputStream
extends OutputStream

A piped output stream can be connected to a piped input stream to create a communications pipe. The piped output stream is the sending end of the pipe. Typically, data is written to a PipedOutputStream object by one thread and data is read from the connected PipedInputStream by some other thread. Attempting to use both objects from a single thread is not recommended as it may deadlock the thread. The pipe is said to be broken if a thread that was reading data bytes from the connected piped input stream is no longer alive.

Since:

JDK1.0

Author:

James Gosling

See Also:

PipedInputStream

Constructor Summary

Constructors

Constructor and Description
NoClosePipedOutputStream() Creates a piped output stream that is not yet connected to a piped input stream.
NoClosePipedOutputStream(NoClosePipedInputStream snk) Creates a piped output stream connected to the specified piped input stream.

Method Summary

Methods

Modifier and Type	Method and Description
void	connect(NoClosePipedInputStream snk) Connects this piped output stream to a receiver.
void	write(byte[] b, int off, int len) Writes len bytes from the specified byte array starting at offset off to this piped output stream.
void	write(int b) Writes the specified byte to the piped output stream.

Methods inherited from class java.io.OutputStream

close, flush, write

Methods inherited from class java.lang.Object

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

Constructor Detail

NoClosePipedOutputStream

public NoClosePipedOutputStream(NoClosePipedInputStream snk)
                         throws IOException

Creates a piped output stream connected to the specified piped input stream. Data bytes written to this stream will then be available as input from snk.

Parameters:

snk - The piped input stream to connect to.

Throws:

IOException - if an I/O error occurs.

NoClosePipedOutputStream

public NoClosePipedOutputStream()

Creates a piped output stream that is not yet connected to a piped input stream. It must be connected to a piped input stream, either by the receiver or the sender, before being used.

See Also:

PipedInputStream.connect(java.io.PipedOutputStream), PipedOutputStream.connect(java.io.PipedInputStream)

Method Detail

connect

public void connect(NoClosePipedInputStream snk)
             throws IOException

Connects this piped output stream to a receiver. If this object is already connected to some other piped input stream, an IOException is thrown.

If snk is an unconnected piped input stream and src is an unconnected piped output stream, they may be connected by either the call:

 src.connect(snk)

or the call:

 snk.connect(src)

The two calls have the same effect.

Parameters:

snk - the piped input stream to connect to.

Throws:

IOException - if an I/O error occurs.

write

public void write(int b)
           throws IOException

Writes the specified byte to the piped output stream.

Implements the write method of OutputStream.

Specified by:

write in class OutputStream

Parameters:

b - the byte to be written.

Throws:

IOException - if the pipe is broken, unconnected, closed, or if an I/O error occurs.

write

public void write(byte[] b,
         int off,
         int len)
           throws IOException

Writes len bytes from the specified byte array starting at offset off to this piped output stream. This method blocks until all the bytes are written to the output stream.

Overrides:

write in class OutputStream

Parameters:

b - the data.

off - the start offset in the data.

len - the number of bytes to write.

Throws:

IOException - if the pipe is broken, unconnected, closed, or if an I/O error occurs.