de.schlichtherle.io.util
Class SynchronizedOutputStream

java.lang.Object
  java.io.OutputStream
      de.schlichtherle.io.util.SynchronizedOutputStream

All Implemented Interfaces:

Closeable, Flushable

public class SynchronizedOutputStream
extends OutputStream

A decorator which synchronizes all access to an OutputStream via an object provided to its constructor.

Since:

TrueZIP 6.4

Version:

$Id: SynchronizedOutputStream.java,v 1.4 2010/08/20 13:09:50 christian_schlichtherle Exp $

Author:

Christian Schlichtherle

Field Summary

protected Object	lock The object to synchronize on - never null.
protected OutputStream	out The decorated output stream.

Constructor Summary

SynchronizedOutputStream(OutputStream out)
Constructs a new synchronized output stream.

SynchronizedOutputStream(OutputStream out, Object lock)
Constructs a new synchronized output stream.

Method Summary

void	close() Synchronizes on the lock and calls doClose().
protected void	doClose() Calls doFlush() and finally closes the underlying stream.
protected void	doFlush() Flushes the underlying stream.
void	flush() Synchronizes on the lock and calls doFlush().
void	write(byte[] b)
void	write(byte[] b, int off, int len)
void	write(int b)

Methods inherited from class java.lang.Object

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

Field Detail

lock

protected final Object lock

The object to synchronize on - never null.

out

protected OutputStream out

The decorated output stream.

Constructor Detail

SynchronizedOutputStream

public SynchronizedOutputStream(OutputStream out)

Constructs a new synchronized output stream. This object will synchronize on itself.

Parameters:

out - The output stream to wrap in this decorator.

SynchronizedOutputStream

public SynchronizedOutputStream(OutputStream out,
                                Object lock)

Constructs a new synchronized output stream.

Parameters:

out - The output stream to wrap in this decorator.

lock - The object to synchronize on. If null, then this object is used, not the stream.

Method Detail

write

public void write(int b)
           throws IOException

Specified by:

write in class OutputStream

Throws:

IOException

write

public void write(byte[] b)
           throws IOException

Overrides:

write in class OutputStream

Throws:

IOException

write

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

Overrides:

write in class OutputStream

Throws:

IOException

flush

public void flush()
           throws IOException

Synchronizes on the lock and calls doFlush().

Specified by:

flush in interface Flushable

Overrides:

flush in class OutputStream

Throws:

IOException

doFlush

protected void doFlush()
                throws IOException

Flushes the underlying stream. This method is not synchronized!

Throws:

IOException

close

public void close()
           throws IOException

Synchronizes on the lock and calls doClose().

Specified by:

close in interface Closeable

Overrides:

close in class OutputStream

Throws:

IOException

doClose

protected void doClose()
                throws IOException

Calls doFlush() and finally closes the underlying stream. This method is not synchronized!

Throws:

IOException