org.tanukisoftware.wrapper.test

Class DeadlockPrintStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

java.io.PrintStream

org.tanukisoftware.wrapper.test.DeadlockPrintStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.Appendable, java.lang.AutoCloseable

public class DeadlockPrintStream
extends java.io.PrintStream

A print stream which can be put into a state in which all calls to write to it will result in the calling threads deadlocking in the call. Obviously, this class will not be useful to many as it is for tests.

Field Summary

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor and Description
DeadlockPrintStream(java.io.PrintStream out) Creates a new DeadlockPrintStream wrapped around another PrintStream.

Method Summary

Modifier and Type	Method and Description
void	close()
void	flush()
void	setDeadlock(boolean deadlock) Sets or clears the deadlock flag.
void	write(byte[] b)
void	write(byte[] b, int off, int len)
void	write(int b)

Methods inherited from class java.io.PrintStream

append, append, append, checkError, clearError, format, format, print, print, print, print, print, print, print, print, print, printf, printf, println, println, println, println, println, println, println, println, println, println, setError

Methods inherited from class java.lang.Object

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

Constructor Detail

DeadlockPrintStream

public DeadlockPrintStream(java.io.PrintStream out)

Creates a new DeadlockPrintStream wrapped around another PrintStream.

Parameters:

out - The PrintStream which will be wrapped by this new stream.

Method Detail

write

public void write(int b)

Overrides:

write in class java.io.PrintStream

write

public void write(byte[] b)
           throws java.io.IOException

Overrides:

write in class java.io.FilterOutputStream

Throws:

java.io.IOException

write

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

Overrides:

write in class java.io.PrintStream

flush

public void flush()

Specified by:

flush in interface java.io.Flushable

Overrides:

flush in class java.io.PrintStream

close

public void close()

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.PrintStream

setDeadlock

public void setDeadlock(boolean deadlock)

Sets or clears the deadlock flag. If set, calls to any other method of this class will result in the calling thread being deadlocked. They will be released if the flag is cleared with this method.

Parameters:

deadlock - True to set the flag, false to clear it.