org.jasig.portal.utils
Class BlockingQueue

java.lang.Object
  org.jasig.portal.utils.BlockingQueue

public class BlockingQueue
extends Object

A simple FIFO queue that has MIN/MAX capacity and that blocks if either enqueue/dequeue would result in violation of these limits. Default values for min/max are 0/infinite

Author:

Peter Kharchenko

Method Summary

Object	dequeue() Remove object from the beginning of the queue
void	enqueue(Object o) Add new object to the end of the queue
int	getMaxSize()
int	getMinSize()
void	setLimits(int max, int min) Set the queue limits.
void	setMaxSize(int max)
void	setMinSize(int min)
int	size()

Methods inherited from class java.lang.Object

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

Method Detail

enqueue

public void enqueue(Object o)
             throws InterruptedException

Add new object to the end of the queue

Parameters:

o - object to be placed on the queue

Throws:

InterruptedException

dequeue

public Object dequeue()
               throws InterruptedException

Remove object from the beginning of the queue

Throws:

InterruptedException - if the wait was interrupted

setLimits

public void setLimits(int max,
                      int min)

Set the queue limits. To specify a queue without an upper bound (that is max=inifinity) use max value of -1

getMaxSize

public int getMaxSize()

getMinSize

public int getMinSize()

setMaxSize

public void setMaxSize(int max)

setMinSize

public void setMinSize(int min)

size

public int size()