de.avanux.livetracker.Tracker.java Source code

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Here is the source code for de.avanux.livetracker.Tracker.java

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/* Copyright (C) 2009  Axel Mller <axel.mueller@avanux.de> 
 * 
 * This file is part of LiveTracker.
 * 
 * LiveTracker is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * LiveTracker is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with LiveTracker.  If not, see <http://www.gnu.org/licenses/>.
 */
package de.avanux.livetracker;

import org.joda.time.DateTime;
import org.joda.time.Duration;

public class Tracker {

    private final static int ADDITIONAL_REFRESH_SECONDS = 5;

    private final static int EXPIRATION_SECONDS = 5;

    private String trackerID;

    private DateTime lastSeen;

    //    private long refreshSeconds;

    public Tracker(String trackerID) {
        this.trackerID = trackerID;
        this.lastSeen = new DateTime();
    }

    public String getTrackerID() {
        return trackerID;
    }

    public DateTime getLastSeen() {
        return lastSeen;
    }

    public void setLastSeen(DateTime lastSeen) {
        //        if(this.lastSeen != null) {
        //            Duration duration = new Duration(this.lastSeen, lastSeen);
        //            this.refreshSeconds = duration.getStandardSeconds();
        //        }
        this.lastSeen = lastSeen;
    }

    public boolean isExpired() {
        Duration age = new Duration(this.lastSeen, new DateTime());
        if (age.getStandardSeconds() > (EXPIRATION_SECONDS + ADDITIONAL_REFRESH_SECONDS)) {
            return true;
        } else {
            return false;
        }
    }

}