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	package dk.thoerup.traininfoservice;
2
3	import java.util.Timer;
4	import java.util.TimerTask;
5	import java.util.logging.Logger;
6
7	import javax.servlet.ServletContextEvent;
8	import javax.servlet.ServletContextListener;
9	import javax.servlet.annotation.WebListener;
10
11	@WebListener
12	public class StatisticsListener implements ServletContextListener {
13
14	Logger log = Logger.getLogger(StatisticsListener.class.getName());
15
16	Timer timer = null;
17	int update_interval;
18
19	public void contextInitialized(ServletContextEvent sce) {
20
21	TraininfoSettings settings = SettingsListener.loadSettings(sce.getServletContext());
22
23	update_interval = settings.getStatsInterval();
24
25	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	log.info("This is not a prod. server, dont start Statistics saver");
28	return;
29	}
30
31
32
33	if ( update_interval > 0 ) {
34	log.info("Statistics saver started with update_interval=" + update_interval);
35	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	} else {
46	log.info("Statistics saver disabled (update_interval == 0) ");
47	}
48	}
49
50
51	public void contextDestroyed(ServletContextEvent sce) {
52	log.info("StatisticsListener::contextDestroyed");
53	if ( timer != null ) {
54	timer.cancel();
55	Statistics.getInstance().saveStats();
56	}
57	}
58
59	}