hades.simulator
Class CommandQueue

java.lang.Object
  hades.simulator.CommandQueue

public final class CommandQueue

extends java.lang.Object

a simple queue data structure used to manager simulator commands. This class realizes a queue data structure used to hold (interactive) simulator commands (e.g. pauseSimulation). It is implemented using a doubly-linked list with root node, and it synchronizes all accessor method to provide a thread-safe (if possible deadlocking) ordering of queue entries.

Nested Class Summary

(package private) class	CommandQueue.SelftestFeeder
(package private) class	CommandQueue.SelftestFetcher

Constructor Summary

CommandQueue()
constructor for an empty command queue.

Method Summary

void	append(java.lang.Object o) append data to the end of this queue
int	countAppends()
int	countFetches()
java.lang.Object	fetch()
void	first() set the cursor to the first node of this list
java.lang.Object	getData() get data of the cursor node
boolean	isEmpty() is this list empty?
void	last() set the cursor to the last node of this list
static void	main(java.lang.String[] argv) main(): simple self test
void	next() move the cursor to the next node, if any
void	prev() move the cursor to the previous node, if any
void	setData(java.lang.Object o) set data of the cursor node
java.lang.String	toString() dump text rep of queue
static void	usage() usage(): how to use the CommandQueue selftest

Methods inherited from class java.lang.Object

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

Constructor Detail

CommandQueue

public CommandQueue()

constructor for an empty command queue.

Method Detail

first

public void first()

set the cursor to the first node of this list

last

public final void last()

set the cursor to the last node of this list

next

public final void next()

move the cursor to the next node, if any

prev

public final void prev()

move the cursor to the previous node, if any

getData

public final java.lang.Object getData()

get data of the cursor node

setData

public final void setData(java.lang.Object o)

set data of the cursor node

append

public void append(java.lang.Object o)

append data to the end of this queue

fetch

public java.lang.Object fetch()

isEmpty

public boolean isEmpty()

is this list empty?

countAppends

public int countAppends()

countFetches

public int countFetches()

toString

public java.lang.String toString()

dump text rep of queue

usage

public static void usage()

usage(): how to use the CommandQueue selftest

main

public static void main(java.lang.String[] argv)

main(): simple self test