org.metasyntactic.thread
Class TakeANumberMonitor

java.lang.Object
  |
  +--org.metasyntactic.thread.TakeANumberMonitor

All Implemented Interfaces:

ReaderWriterMonitor

public class TakeANumberMonitor

extends java.lang.Object

implements ReaderWriterMonitor

As each reader or writer arrives, it takes the next number and threads are served in order by their number. However, all readers with consecutive numbers are served at the same time.

Field Summary

protected int	nextNumber Take a number
protected int	nowServing Number now being served
protected int	readersReading Number readers reading

Constructor Summary

TakeANumberMonitor()

Method Summary

void	startReading() Called to begin reading the shared data structure.
void	startWriting() Called to begin writing the shared data structure.
void	stopReading() Called when the thread is finished reading the shared data structure.
void	stopWriting() Called when the thread is finished writing the shared data structure.

Methods inherited from class java.lang.Object

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

Field Detail

readersReading

protected int readersReading

Number readers reading

nextNumber

protected int nextNumber

Take a number

nowServing

protected int nowServing

Number now being served

Constructor Detail

TakeANumberMonitor

public TakeANumberMonitor()

Method Detail

startReading

public void startReading()
                  throws java.lang.InterruptedException

Description copied from interface: ReaderWriterMonitor

Called to begin reading the shared data structure. exception InterruptedException If interrupted while waiting for access.

Specified by:

startReading in interface ReaderWriterMonitor

Throws:

java.lang.InterruptedException - When the thread is interrupted before starting

stopReading

public void stopReading()

Description copied from interface: ReaderWriterMonitor

Called when the thread is finished reading the shared data structure.

Specified by:

stopReading in interface ReaderWriterMonitor

startWriting

public void startWriting()
                  throws java.lang.InterruptedException

Description copied from interface: ReaderWriterMonitor

Called to begin writing the shared data structure. exception InterruptedException If interrupted while waiting for access.

Specified by:

startWriting in interface ReaderWriterMonitor

Throws:

java.lang.InterruptedException - When the thread is interrupted before starting

stopWriting

public void stopWriting()

Description copied from interface: ReaderWriterMonitor

Called when the thread is finished writing the shared data structure.

Specified by:

stopWriting in interface ReaderWriterMonitor