package jadex.commons.service.clock;
import jadex.commons.ChangeEvent;
/**
* An event-driven simulation clock represents a discrete
* clock that is based on a event-list.
*/
public class SimulationEventClock extends AbstractClock implements ISimulationClock
{
//-------- constructors --------
/**
* Create a new clock.
* @param name The name.
* @param starttime The start time.
* @param delta The tick size.
*/
public SimulationEventClock(String name, long starttime, long delta)
{
super(name, starttime, delta);
}
/**
* Create a new clock.
* @param oldclock The old clock.
*/
public SimulationEventClock(IClock oldclock)
{
this(null, 0, DEFAULT_DELTA);
copyFromClock(oldclock);
}
//-------- methods --------
/**
* Advance one event.
* @return True, if clock could be advanced.
*/
public boolean advanceEvent()
{
boolean advanced = false;
Timer t = null;
Timer dorem = null;
synchronized(this)
{
if(STATE_RUNNING.equals(state) && timers.size()>0)
{
advanced = true;
t = (Timer)timers.first();
long tmptime = t.getNotificationTime();
if(tmptime>currenttime)
currenttime = tmptime;
//System.out.println("time event notificaton: "+t);
dorem = t;
// removeTimer(t);
// t.getTimedObject().timeEventOccurred();
//System.out.println("timers remaining: "+timers.size());
}
}
if(dorem!=null)
removeTimer(dorem);
// Must not be done while holding lock to avoid deadlocks.
if(t!=null)
t.getTimedObject().timeEventOccurred(currenttime);
notifyListeners(new ChangeEvent(this, EVENT_TYPE_NEXT_TIMEPOINT));
return advanced;
}
/**
* Get the clock type.
* @return The clock type.
*/
public String getType()
{
return IClock.TYPE_EVENT_DRIVEN;
}
}