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The Jadex platform base package contains
functionality useful for constructing platforms.
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package jadex.base.service.clock;
import jadex.bridge.service.types.clock.IClock;
import jadex.bridge.service.types.clock.ITimedObject;
import jadex.bridge.service.types.clock.ITimer;
import jadex.commons.ChangeEvent;
import jadex.commons.IChangeListener;
import jadex.commons.collection.SCollection;
import jadex.commons.future.IResultListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.SortedSet;
import java.util.TreeSet;
/**
* Abstract base class for all clocks.
*/
public abstract class AbstractClock implements IClock
{
//-------- constants --------
/** The default delta (tick time). */
public static final long DEFAULT_DELTA = 100;
//-------- attributes --------
/** The clock name. */
protected String name;
/** The start time (model time). */
protected long starttime;
/** The current time (last measurement). */
protected long currenttime;
/** The clock tick delta (relative to base time). */
protected long delta;
/** The clock state. */
protected String state;
/** The tick timers. */
protected List ticktimers;
/** The timers (entries ordered by timepoint). */
public SortedSet timers;
/** The tick timer. */
protected Timer ticktimer;
/** The change listeners. */
protected List listeners;
//-------- constructors --------
/**
* Create a new clock.
*/
public AbstractClock(String name, long starttime, long delta)
{
this.name = name;
this.starttime = starttime;
this.currenttime = starttime;
this.delta = delta;
this.state = STATE_SUSPENDED;
this.listeners = Collections.synchronizedList(SCollection.createArrayList());
// Sorted set for all entries ordered by due time.
this.timers = Collections.synchronizedSortedSet(new TreeSet(new Comparator()
{
/**
* Compare two timers.
* @param arg0 The first timer.
* @param arg1 The second timer.
*/
public int compare(Object arg0, Object arg1)
{
Timer t1 = (Timer)arg0;
Timer t2 = (Timer)arg1;
long ret = t1.getNotificationTime() - t2.getNotificationTime();
if(ret==0 && t1!=t2)
ret = t1.getNumber()-t2.getNumber();
return ret>0 ? 1 : ret<0 ? -1 : 0;
}
}));
this.ticktimers = SCollection.createArrayList();
// The ticktimer is a normal timer which indicates when the next
// tick is due. It then notifies all registered tick timers.
this.ticktimer = new Timer(0, this, new ITimedObject()
{
public void timeEventOccurred(long currenttime)
{
TickTimer[] tts;
synchronized(AbstractClock.this)
{
// System.out.println("Ticktimer notified: "+ticktimers);
tts = (TickTimer[])ticktimers.toArray(new TickTimer[ticktimers.size()]);
ticktimers.clear();
}
for(int i=0; igetTime())
{
long num = (getTime()-getStarttime())/getDelta();
long time = (num+1)*getDelta()+getStarttime();
ticktimer.setNotificationTime(time);
// System.out.println("Ticktimer at: "+time);
}
}
notifyListeners(new ChangeEvent(this, EVENT_TYPE_NEW_DELTA));
}
/**
* Get the next timer.
* @return The next timer.
*/
public synchronized ITimer getNextTimer()
{
return timers.size()==0? null: (ITimer)timers.first();
}
/**
* Get the clock state.
* @return The clock state.
*/
public String getState()
{
return state;
}
/**
* Start the clock.
*/
public void start()
{
if(!STATE_RUNNING.equals(state))
{
this.state = STATE_RUNNING;
notifyListeners(new ChangeEvent(this, EVENT_TYPE_STARTED));
}
}
/**
* Stop the clock.
*/
public void stop()
{
if(STATE_RUNNING.equals(state))
{
this.state = STATE_SUSPENDED;
notifyListeners(new ChangeEvent(this, EVENT_TYPE_STOPPED));
}
}
/**
* Reset the clock.
*/
public synchronized void reset()
{
if(STATE_RUNNING.equals(state))
this.state = STATE_SUSPENDED;
this.currenttime = starttime;
this.timers.clear();
this.ticktimers.clear();
notifyListeners(new ChangeEvent(this, EVENT_TYPE_RESET));
}
/**
* Create a new timer.
* @param timespan The timespan.
* @param to The timed object.
*/
public ITimer createTimer(long timespan, ITimedObject to)
{
Timer t = new Timer(getTime()+timespan, this, to);
addTimer(t);
return t;
}
/**
* Create a new tick timer.
* @param to The timed object.
* @param info Optional info object.
*/
public ITimer createTickTimer(ITimedObject to)
{
TickTimer t = new TickTimer(this, to);
addTickTimer(t);
return t;
}
/**
* Get all active timers.
* @return The active timers.
*/
public ITimer[] getTimers()
{
ITimer[] ret;
if(ticktimer!=null)
{
List clone = new ArrayList(timers);
clone.remove(ticktimer);
ret = (ITimer[])clone.toArray(new ITimer[0]);
}
else
{
ret = (ITimer[])timers.toArray(new ITimer[0]);
}
return ret;
}
/**
* Get all active tick timers.
* @return The active tick timers.
*/
public ITimer[] getTickTimers()
{
return (ITimer[])ticktimers.toArray(new ITimer[0]);
}
/**
* Add a timer.
* @param timer The timer.
*/
public void addTimer(ITimer timer)
{
synchronized(this)
{
timers.add(timer);
// System.err.println("Added timer: "+timers);
}
notifyListeners(new ChangeEvent(this, EVENT_TYPE_TIMER_ADDED));
}
/**
* Remove a timer.
* @param timer The timer.
*/
public void removeTimer(ITimer timer)
{
synchronized(this)
{
timers.remove(timer);
// System.err.println("Removed timer: "+timers);
}
notifyListeners(new ChangeEvent(this, EVENT_TYPE_TIMER_REMOVED));
}
/**
* Add a tick timer.
* @param timer The timer.
*/
public void addTickTimer(ITimer timer)
{
synchronized(this)
{
ticktimers.add(timer);
activateTickTimer();
// if(!timers.contains(ticktimer))
// {
// long num = (getTime()-getStarttime())/getDelta();
// long time = (num+1)*getDelta()+getStarttime();
// ticktimer.setNotificationTime(time);
// System.out.println("Ticktimer at: "+time+" "+getTime());
// }
}
notifyListeners(new ChangeEvent(this, EVENT_TYPE_TIMER_ADDED));
}
/**
* Activate the tick timer.
*/
protected void activateTickTimer()
{
if(!timers.contains(ticktimer))
{
long num = (getTime()-getStarttime())/getDelta();
long time = (num+1)*getDelta()+getStarttime();
ticktimer.setNotificationTime(time);
// System.out.println("Ticktimer at: "+time+" "+getTime());
}
}
/**
* Remove a tick timer.
* @param timer The timer.
*/
public void removeTickTimer(ITimer timer)
{
synchronized(this)
{
ticktimers.remove(timer);
if(ticktimers.size()==0)
removeTimer(ticktimer);
}
notifyListeners(new ChangeEvent(this, EVENT_TYPE_TIMER_REMOVED));
}
/**
* Add a change listener.
* @param listener The change listener.
*/
public void addChangeListener(IChangeListener listener)
{
listeners.add(listener);
}
/**
* Remove a change listener.
* @param listener The change listener.
*/
public void removeChangeListener(IChangeListener listener)
{
listeners.remove(listener);
}
/**
* Notify the listeners.
*/
protected void notifyListeners(ChangeEvent ce)
{
// System.out.println(""+this.getClass()+" "+ce);
IChangeListener[] cls = (IChangeListener[])listeners.toArray(new IChangeListener[0]);
for(int i=0; i