thoerup/traininfoservice/StatisticsListener.java

package dk.thoerup.traininfoservice;

import java.util.Timer;
import java.util.TimerTask;
import java.util.logging.Logger;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;

@WebListener
public class StatisticsListener implements ServletContextListener {
        
        Logger log = Logger.getLogger(StatisticsListener.class.getName());

        Timer timer = null;
        int update_interval;

    public void contextInitialized(ServletContextEvent sce) {
        
        TraininfoSettings settings = SettingsListener.loadSettings(sce.getServletContext());
        
        update_interval = settings.getStatsInterval();                  
        
        if (! sce.getServletContext().getRealPath("/").startsWith("/home/app/")  ) {
                //if path not starts with /home/app then it is not running on a production server and we only collects stats on prod servers
                log.info("This is not a prod. server, dont start Statistics saver");
                return;
        }
        
        
        if ( update_interval > 0 ) {
                log.info("Statistics saver started with update_interval=" + update_interval);
                timer =  new Timer();
                
                TimerTask statsUpdate = new TimerTask() {
                                @Override
                                public void run() {
                                        Statistics.getInstance().saveStats();
                                }
                };
                
                timer.schedule(statsUpdate, 0, update_interval);
        } else {
                log.info("Statistics saver disabled (update_interval == 0) ");
        }
    }


    public void contextDestroyed(ServletContextEvent sce) {
        log.info("StatisticsListener::contextDestroyed");
        if ( timer != null ) {
                timer.cancel();
                Statistics.getInstance().saveStats();
        }
    }

}
1	torben	811	package dk.thoerup.traininfoservice;
2
3			import java.util.Timer;
4			import java.util.TimerTask;
5	torben	816	import java.util.logging.Logger;
6	torben	811
7			import javax.servlet.ServletContextEvent;
8			import javax.servlet.ServletContextListener;
9	torben	959	import javax.servlet.annotation.WebListener;
10	torben	811
11	torben	959	@WebListener
12	torben	811	public class StatisticsListener implements ServletContextListener {
13	torben	816
14			Logger log = Logger.getLogger(StatisticsListener.class.getName());
15	torben	811
16			Timer timer = null;
17			int update_interval;
18
19			public void contextInitialized(ServletContextEvent sce) {
20
21	torben	1316	TraininfoSettings settings = SettingsListener.loadSettings(sce.getServletContext());
22	torben	816
23	torben	1316	update_interval = settings.getStatsInterval();
24	torben	816
25	torben	1022	if (! sce.getServletContext().getRealPath("/").startsWith("/home/app/") ) {
26			//if path not starts with /home/app then it is not running on a production server and we only collects stats on prod servers
27	torben	1023	log.info("This is not a prod. server, dont start Statistics saver");
28	torben	1022	return;
29			}
30
31	torben	1023
32
33	torben	811	if ( update_interval > 0 ) {
34	torben	1023	log.info("Statistics saver started with update_interval=" + update_interval);
35	torben	811	timer = new Timer();
36
37			TimerTask statsUpdate = new TimerTask() {
38			@Override
39			public void run() {
40			Statistics.getInstance().saveStats();
41			}
42			};
43
44			timer.schedule(statsUpdate, 0, update_interval);
45	torben	1023	} else {
46			log.info("Statistics saver disabled (update_interval == 0) ");
47	torben	811	}
48			}
49
50
51			public void contextDestroyed(ServletContextEvent sce) {
52	torben	816	log.info("StatisticsListener::contextDestroyed");
53	torben	1030	if ( timer != null ) {
54	torben	811	timer.cancel();
55	torben	814	Statistics.getInstance().saveStats();
56	torben	811	}
57			}
58
59			}