thoerup/traininfoservice/StatisticsListener.java

package dk.thoerup.traininfoservice;

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

import javax.servlet.ServletContext;
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.ServletContext;
8	import javax.servlet.ServletContextEvent;
9	import javax.servlet.ServletContextListener;
10	import javax.servlet.annotation.WebListener;
11
12	@WebListener
13	public class StatisticsListener implements ServletContextListener {
14
15	Logger log = Logger.getLogger(StatisticsListener.class.getName());
16
17	Timer timer = null;
18	int update_interval;
19
20	public void contextInitialized(ServletContextEvent sce) {
21
22	TraininfoSettings settings = SettingsListener.loadSettings(sce.getServletContext());
23
24	update_interval = settings.getStatsInterval();
25
26	if (! sce.getServletContext().getRealPath("/").startsWith("/home/app/") ) {
27	//if path not starts with /home/app then it is not running on a production server and we only collects stats on prod servers
28	log.info("This is not a prod. server, dont start Statistics saver");
29	return;
30	}
31
32
33
34	if ( update_interval > 0 ) {
35	log.info("Statistics saver started with update_interval=" + update_interval);
36	timer = new Timer();
37
38	TimerTask statsUpdate = new TimerTask() {
39	@Override
40	public void run() {
41	Statistics.getInstance().saveStats();
42	}
43	};
44
45	timer.schedule(statsUpdate, 0, update_interval);
46	} else {
47	log.info("Statistics saver disabled (update_interval == 0) ");
48	}
49	}
50
51
52	public void contextDestroyed(ServletContextEvent sce) {
53	log.info("StatisticsListener::contextDestroyed");
54	if ( timer != null ) {
55	timer.cancel();
56	Statistics.getInstance().saveStats();
57	}
58	}
59
60	}