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Class magician.Node.SchedQueue 

java.lang.Object
   |
   +----magician.Node.SchedQueue
public class SchedQueue
extends Object
SchedQueue implements a simple queue mechanism. Allows for enumeration of the elements.

Variable Index

o head
o length
o tail

Constructor Index

o SchedQueue()

Method Index

o dequeue()
Dequeue the oldest object on the queue.
o dequeue(long)
Dequeue the oldest object on the queue.
o dump(String)
writes objects to output with message
o elements()
Returns an enumeration of the elements in Last-In, First-Out order.
o enqueue(Object)
Enqueue an object.
o isEmpty()
Is the queue empty?
o reverseElements()
Returns an enumeration of the elements in First-In, First-Out order.

Variables

o length 
 int length
o head 
 QueueElement head
o tail 
 QueueElement tail

Constructors

o SchedQueue 
 public SchedQueue()

Methods

o enqueue 
 public synchronized void enqueue(Object obj)
Enqueue an object.

Parameters:
obj - object to be queued
o dequeue 
 public Object dequeue() throws InterruptedException
Dequeue the oldest object on the queue. Will wait indefinitely.

Returns:
the oldest object on the queue.
Throws: InterruptedException
if operation is interrupted
o dequeue 
 public synchronized Object dequeue(long timeOut) throws InterruptedException
Dequeue the oldest object on the queue.

Parameters:
timeOut - the number of milliseconds to wait for something to arrive.
Returns:
the oldest object on the queue.
Throws: InterruptedException
if operation is interrupted
o isEmpty 
 public boolean isEmpty()
Is the queue empty?

Returns:
true if the queue is empty.
o elements 
 public final synchronized Enumeration elements()
Returns an enumeration of the elements in Last-In, First-Out order. Use the Enumeration methods on the returned object to fetch the elements sequentially.

Returns:
an enumeration of objects in the queue
o reverseElements 
 public final synchronized Enumeration reverseElements()
Returns an enumeration of the elements in First-In, First-Out order. Use the Enumeration methods on the returned object to fetch the elements sequentially.

Returns:
an enumeration of objects in the queue
o dump 
 public synchronized void dump(String msg)
writes objects to output with message

Parameters:
msg - the message to prepended to output 
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