org.ws4d.java.structures

Class WaitingQueue

java.lang.Object

org.ws4d.java.structures.Queue

org.ws4d.java.structures.WaitingQueue

public class WaitingQueue
extends Queue

Synchronized Queue. The enqueueing thread must wait, until someone takes the object out of the queue.

Constructor Summary

Constructors

Constructor and Description
WaitingQueue()

Method Summary

Modifier and Type	Method and Description
protected void	addElement(java.lang.Object o, int index) Adds element to vector at specified position.
void	clear() Removes all entries from this queue and notifies all waiting thread.
protected java.lang.Object	getFirstElement() Returns the first element of this queue.
Iterator	iterator() Returns an iterator for this queue.

Methods inherited from class org.ws4d.java.structures.Queue

checkFirst, checkFirstElement, enqueue, enqueueAtBeginning, get, isEmpty, size

Methods inherited from class java.lang.Object

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

Constructor Detail

WaitingQueue

public WaitingQueue()

Method Detail

getFirstElement

protected java.lang.Object getFirstElement()

Description copied from class: Queue

Returns the first element of this queue. The first element is removed from queue, element at index 1 becomes first, etc.

Overrides:

getFirstElement in class Queue

Returns:

the first element.

addElement

protected void addElement(java.lang.Object o,
                          int index)

Description copied from class: Queue

Adds element to vector at specified position. If the position is -1 the object will added to the end of the vector.

Overrides:

addElement in class Queue

Parameters:

o - object to add.

index - where to insert the object. If -1, the object will be added at the end.

iterator

public Iterator iterator()

Returns an iterator for this queue.

This iterator allows to access every item inside this queue. If an element is removed using this iterator the waiting thread will be notified.

Overrides:

iterator in class Queue

Returns:

the iterator for this queue.

clear

public void clear()

Removes all entries from this queue and notifies all waiting thread.

Overrides:

clear in class Queue