cz.zcu.validationserver.streams
Class ThreadErrorStream

java.lang.Object
  java.io.OutputStream
      cz.zcu.validationserver.streams.ThreadErrorStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable

public class ThreadErrorStream
extends java.io.OutputStream

Tohle je velmi zajimavy stream: Bude slouzit jako nahrada standardniho err streamu - tenhle stream ma tu nevyhodu, ze je globalni, tj. je pro vsechna vlakna stejny. Ja potrebuji, aby tyhle streamy (jak out, tak err) byly pro ruzna vlakna ruzne, tj. aby kazde vlakno melo svuj standardni vystup - ale aby do nej mohlo normalne zapisovat pres System.out a System.err. Proto tenhle stream bude umet to, ze pokazde, kdyz nekdo zavola jeho zapisovaci metodu, koukne se, z jakeho vlakna je volany a pokud je volany z vlakna zdedeneho od OwnIOThread (vi. tenhle balik), tj. prave od vlakna, ktere chce mit vlastni I/O, zapise data do streamu nadefinovanych timto vlaknem. Pokud vlakno nerozpozna (tj. neni zdedene od OwnIOThread), zapise to na streamy, ktere byly jako standardni nastaveny puvodne. (tj. jako by tam tenhle stream vubec nebyl).

Author:

Lukas Valenta (lukas.valenta@seznam.cz)

Field Summary

private java.io.PrintStream	backupErr
private boolean	installed
private static ThreadErrorStream	instance

Constructor Summary

private

ThreadErrorStream()

Method Summary

static void	installStream() Metoda nainstaluje tenhle stream do Systemu (namisto stavajiciho System.err streamu).
static void	uninstallStream() Metoda odinstaluje tenhle stream ze systemu
void	write(int b)

Methods inherited from class java.io.OutputStream

close, flush, write, write

Methods inherited from class java.lang.Object

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

Field Detail

instance

private static final ThreadErrorStream instance

installed

private boolean installed

backupErr

private java.io.PrintStream backupErr

Constructor Detail

ThreadErrorStream

private ThreadErrorStream()

Method Detail

installStream

public static void installStream()

Metoda nainstaluje tenhle stream do Systemu (namisto stavajiciho System.err streamu).

uninstallStream

public static void uninstallStream()

Metoda odinstaluje tenhle stream ze systemu

write

public void write(int b)
           throws java.io.IOException

Specified by:

write in class java.io.OutputStream

Throws:

java.io.IOException