netcom.util
Class SQueue

java.lang.Object
  java.util.AbstractCollection
      java.util.AbstractList
          java.util.Vector
              netcom.util.SQueue

All Implemented Interfaces:

java.lang.Cloneable, java.util.Collection, java.util.List, java.util.RandomAccess, java.io.Serializable

public class SQueue

extends java.util.Vector

implements a FIFO queue of Objects

See Also:

Serialized Form

Field Summary

Fields inherited from class java.util.Vector

capacityIncrement, elementCount, elementData

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

SQueue()
Creates new Queue

SQueue(int preload)

Method Summary

java.lang.Object	dequeue() Remove object from the head of the queue
java.lang.Object	dequeueOrWait(long timeout) Remove object from the head of the queue.
void	enqueue(java.lang.Object obj) Add object to the tail of the queue
boolean	isQueueEmpty() test if queue has elements
java.lang.Object	peek() Get object reference from the head of the queue without dequeueing it
void	scan(netcom.util.SQueue.Scanner scanner) lock and scan queue.

Methods inherited from class java.util.Vector

add, add, addAll, addAll, addElement, capacity, clear, clone, contains, containsAll, copyInto, elementAt, elements, ensureCapacity, equals, firstElement, get, hashCode, indexOf, indexOf, insertElementAt, isEmpty, lastElement, lastIndexOf, lastIndexOf, remove, remove, removeAll, removeAllElements, removeElement, removeElementAt, removeRange, retainAll, set, setElementAt, setSize, size, subList, toArray, toArray, toString, trimToSize

Methods inherited from class java.util.AbstractList

iterator, listIterator, listIterator

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.List

iterator, listIterator, listIterator

Constructor Detail

SQueue

public SQueue()

Creates new Queue

SQueue

public SQueue(int preload)

Method Detail

enqueue

public void enqueue(java.lang.Object obj)

Add object to the tail of the queue

Parameters:

obj - object being added

dequeue

public java.lang.Object dequeue()

Remove object from the head of the queue

Returns:

removed object

peek

public java.lang.Object peek()

Get object reference from the head of the queue without dequeueing it

Returns:

object or null

dequeueOrWait

public java.lang.Object dequeueOrWait(long timeout)

Remove object from the head of the queue. If there are no objects in the queue, then wait until notified or until the timeout expires

Parameters:

timeout - the timeout in milliseconds

Returns:

removed object

isQueueEmpty

public boolean isQueueEmpty()

test if queue has elements

Returns:

true if queue is empty

scan

public void scan(netcom.util.SQueue.Scanner scanner)

lock and scan queue. If scanner returns true, the element is deleted