WonesysAlarmRequester.java

package org.opennaas.extensions.roadm.wonesys.protocols.alarms;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.TimerTask;

import com.wonesys.emsModule.alarms.Alarm;
import com.wonesys.emsModule.alarms.AlarmsControler;

/**
 * Allows periodically request of alarms
 * 
 * @author isart
 * 
 */
public class WonesysAlarmRequester extends TimerTask {

	/**
	 * EMSModule alarms controller
	 */
	AlarmsControler	acontroller			= null;

	/**
	 * Date of reception of last alarm
	 */
	long			lastReceptionDate	= 0;

	public WonesysAlarmRequester(AlarmsControler acontroller) {
		this.acontroller = acontroller;

	}

	public void run() {
		Collection<Alarm> alarms = requestAlarmsSync();
		notifyAlarmsToListeners(alarms);
	}

	private Collection<Alarm> requestAlarmsSync() {

		Collection<Alarm> alarms = acontroller.getAlarmsList();
		return alarms;
	}

	private void notifyAlarmsToListeners(Collection<Alarm> alarms) {

		if (alarms == null)
			return;

		Iterator<Alarm> it = alarms.iterator();
		long lastReceptionDate_tmp = lastReceptionDate;
		Collection<Alarm> newAlarms = new ArrayList<Alarm>();
		// filter alarms by Date
		while (it.hasNext()) {
			Alarm alarm = it.next();
			long receptionDate = alarm.getDataRecepcio();
			if (receptionDate > lastReceptionDate) {
				if (receptionDate > lastReceptionDate_tmp) {
					lastReceptionDate_tmp = receptionDate;
				}
				newAlarms.add(alarm);
			}
		}
		lastReceptionDate = lastReceptionDate_tmp;

		for (Alarm alarm : newAlarms) {
			// notify event
			// there's no need of using same EventManager for publishing and for handling
			new WonesysEventManager().publishEvent(createAlarmEvent(alarm));
		}
	}

	private WonesysAlarmEvent createAlarmEvent(Alarm alarm) {
		return new WonesysAlarmEvent(alarm);
	}

}